As part of our Single-Family Zoning analysis for the San Francisco Bay Area, Greater LA Region, Sacramento Region and San Diego, we identified the distribution of single-family zoning in each city, unincorporated area and broader region. On those pages, we shared our findings regarding the observed relationship between single-family zoning and socio-demographic indicators, including racial demographics, intergenerational mobility and levels of racial residential segregation. We also identified cities in each region that could benefit from zoning reforms allowing equitable development and mitigating harms of single-family-only zoning.
The Zoning Reform Tracker
The Othering & Belonging Institute is proud to launch the Zoning Reform Tracker and share information on municipal zoning reform efforts across the United States.1 The Zoning Reform Tracker is meant to serve as a hub for documenting zoning reform efforts in the country.2 It is our belief that anti-density zoning ordinances play a powerful role not only in propagating race- and class-based exclusion, but in shaping life outcomes for children in communities, and therefore in furthering patterns of negative intergenerational stratification.3 Restrictive zoning is a powerful mechanism for hoarding resources, with great implications for racial residential segregation,4 and the former will not fundamentally change without reforming or overriding zoning regulations at the municipal level.5
In the first version of the Zoning Reform Tracker, we focus specifically on municipal zoning reform efforts. Throughout this project, we use the phrase zoning reform effort or initiative, because some of the events we track are not merely successful adoptions of zoning reforms, but are their ongoing status, as well as their denials, failures, false starts, and informal legislative tablings.
There are two components to the Zoning Reform Tracker: the database, and the webmap. The database is a sortable list of municipalities which have had some character of a zoning reform initiative, and inclusive therein are columns that describe various components of a given reform initiative. The database is then our most detailed collection or representation of zoning reform efforts across the United States. The webmap, on the other hand, is an interactive national map that marks the points of each reform initiative, and allows the user to explore the question of location, in terms of zoning reform initiatives occurring at the municipal level across the United States.
In separate documentation on the navigation menu on the right-hand side of this page, we have subpages that explain the variables used in our tracker, including one which specifically establishes an overview of the variables, as well as others which focus on the zoning reform mechanism, phase, and type. The latter three are the most important classes of how we group zoning reform efforts, and they constitute the triad of typologies which are important for our organization and representation of reform.
We created this tracker because, to the best of knowledge, there is no other single repository tracking such reform.6 The tracker attempts to be comprehensive, and so we will periodically add reform efforts as we become aware of them. Please fill out this Google Form if you feel we are missing something or our information is inaccurate.7 As we update these tracking tools with new data or information, we’ll reflect those changes in our database and webmap, as well as in the supportive documentation.8
Comprehensively, we believe that this is an important tracker that can not only inform the public, but can also provide support for advocacy efforts across the United States.9
Interactive Webmap
Click here to expand the webmap for full-screen viewing. For more information on the webmap fields, look towards the supportive documents at the right hand side of this page. And for an extensive look at the data represented herein, look towards the database below, which has additional fields not represented in the webmap above.
Sortable Database
The sortable database below presents all of the fields that we record in our tracker; please note that you can scroll to the right to see several other columns that aren’t initially visible. Furthermore, you can click and select any of the filter tabs below to narrow your search: either by the name of a jurisdiction or by the subclass of one of our typologies. You can also combine a jurisdiction filter and a typology filter to get more specific results. To reset the results just go back to 'Any' for each filter, or refresh the page.
| Municipality Name | State Name | State Short | Reform Mechanism | Reform Phase | Reform Type | Legislative Number/Policy Name | Time Status | Primary Source | Secondary Source | Description |
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Municipality Name | State Name | State Short | Reform Mechanism | Reform Phase | Reform Type | Legislative Number/Policy Name | Time Status | Primary Source | Secondary Source | Description |
|---|---|---|---|---|---|---|---|---|---|---|
| Albemarle | North Carolina | NC | Municipal Ordinance | Approved | Other Reform | Ordinance No. 21-02 | Adopted on 1/19/2021 | View Source | View Source | View Description The City Council of Albemarle adopted an ordinance that removed mandatory parking minimums from the zoning code. These changes to the parking standards run across nearly all commercial, industrial and residential uses, with a few exceptions. The city still requires 1-parking spot for ADU development. |
| Albuquerque | New Mexico | NM | Municipal Ordinance | Approved | ADU Reform, Other Reform | Council Bill No. O-22-54 | Adopted on 6/21/2023 | View Source | View Source | View Description The City Council of Albuquerque adopted a zoning reform which made two central changes. First, it made detached ADUs an allowable use across single-family zoned districts in the municipality (specifically R-1 and R-A). Second, it streamlined the conversion of non-residential uses to multi-family residential uses in mixed use and a business/commercial district. |
| Alexandria | Virginia | VA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 21-0620 | Approved on 1/23/2021 | View Source | View Source | View Description The City Council of Alexandria approved an ADU reform which made three central changes. First, it permitted attached or detached ADUs city-wide in residentially zoned areas (single-family, two-family or townhouse districts). Second, it removed minimum parking requirements for ADU construction or conversion. And third, while requiring owner-occupancy of the principal dwelling, it legalized short-term renting of the ADU, so long as the owner resides in the principal dwelling. (The last sentence is not a statement of support for the latter end of the policy, but merely a description of the elements of the ordinance.) |
| Alexandria | Virginia | VA | Intensive Zoning Code Effort | Approved | Plex Reform, TOD Reform | Zoning for Housing/Housing for All | Approved on 11/28/2023 | View Source | View Source | View Description Zoning for Housing aims to expand housing production and affordable housing through zoning reform, and improve equitable housing access, while Housing for All is a programme that explores the impact of past discriminatory housing policies and laws on people of color and low-income earners today. Major reforms included in Zoning for Housing were abolishing single-family zoning, allowing residential uses in industrial zones, and relaxing parking requirements. However, with regard to the abolition of zoning for single-family homes, a lawsuit was filed in August 2024 by residents seeking a review of the approval, and there is a possibility that it will move to court in the future. Depending on how it is handled in the future, it is possible that the content of the approval for Zoning for Housing will be changed. |
| Anchorage | Alaska | AK | Municipal Ordinance | Approved | Other Reform | AO No. 2022-80(S) | Adopted on 11/22/2022 | View Source | View Source | View Description The City of Anchorage adopted an ordinance which removed mandatory parking minimums from the city. The policy goals of this reform were threefold. First, the city intends to make multi-family housing more affordable to build. Second, the city intends to encourage adaptive reuse of underutilized and vacant properties. Third, the city intends to encourage non-automobile forms of mobility and walkability. |
| Anchorage | Alaska | AK | Municipal Ordinance | Approved | ADU Reform | AO No. 2022-107 | Approved on 1/10/2023 | View Source | View Source | View Description The City of Anchorage adopted an accessory dwelling unit (ADU) reform ordinance, and it made three central changes. The first is that it allowed ADUs to be built on single-family zoned districts across the jurisdiction. The second is that it allowed for ADU development on multi-family and commercially zoned districts, which makes the policy more extensive than many others enacted in the US. The third is that it reduced certain owner occupancy requirements for building or renting an ADU. Lastly, it seems that the city has intentions of making the ADU process public-facing and as accessible as possible, to the segment of the public who could utilize the policy. |
| Anchorage | Alaska | AK | Municipal Ordinance | Approved | Plex Reform | AO 2023-103(S) | Approved on 12/19/2023 | View Source | View Source | View Description The Anchorage City Council approved an amendment to AO 2023-103 (S) to facilitate multi-family housing development. The amendment aligns the regulations for three- and four-unit developments with the same regulations as single-family and duplex in zones where multi-family housing is permitted under the Anchorage 2040 Land Use Plan. The amendment is included in Title 21 – Land Use. |
| Anchorage | Alaska | AK | Municipal Ordinance | Approved | Plex Reform, ADU Reform | Housing Opportunities in the Municipality for Everyone - HOME (AO No. 2023-87) | Approved on 6/25/2024 | View Source | View Source | View Description The City of Anchorage adopted the HOME Initiative, which is an intensive zoning code update that will eliminate single-family zoning in certain parts of their jurisdiction along with other items. There are three important changes here. First, the initiative replaces four low-density districts with the new STFR ('Single and Two Family Residential') zoning district. Second, in addition to this new district, the jurisdiction will continue to allow ADUs on each prior single-family lot that is now redefined under the zoning code update (this is carried over from a prior reform). Third, the zoning code simplifies and reduces 11 other residential districts into other 4 simplified districts: CMR-L, CMR-M, URH and LLR (see source for more information). A caveat and limitation with this measure–and why it was prior marked as potentially constitutive of a denial or rejection of some form–is that this zoning change would exempt some sub-regions of the city, besides the Anchorage Bowl, from the elimination of single-family zoning (in particular: Girdwood and Eagle River). |
| Ann Arbor | Michigan | MI | Municipal Ordinance | Approved | ADU Reform | Amendments to the Accessory Dwelling Unit Requirement | Passed on 6/07/2021 | View Source | View Source | View Description The City Council of Ann Arbor passed an amendment of its zoning code, which reformed the city's ADU provisions. The ordinance made three central updates. The first is that it expanded the total eligible properties wherein one might construct or convert an ADU. The second is that is generally reduced restrictions in the application and approval process. The third is that it reduced the parking minimum, but still requires at least one off-street parking spot for an ADU if the lot isn't within a 1/4 mile of a bus stop. |
| Ann Arbor | Michigan | MI | Intensive Zoning Code Effort | Approved | TOD Reform | Ordinance No. ORD-21-19 | Approved on 7/06/2021 | View Source | View Source | View Description The City of Ann Arbor approved a transit-oriented development (TOD ordinance). First, the ordinance created a new district, the Transit Corridor (TC1) district, in order to facilitate transit oriented development in the jurisdiction. This district is intended to create at least two-story housing close to transit, with the purposes of encouraging infill development, expanding multi-family housing variety and option, and generate walkable and mobile communities. |
| Arlington | Virginia | VA | Intensive Zoning Code Effort | Approved | Plex Reform | Expanding Housing Options | Approved on 3/22/2023 | View Source | View Source | View Description The County of Arlington approved considerable changes to their zoning code, following their Missing Middle Housing Study (MMHS). The reform makes three central changes. The first is that allows townhomes and buildings with 2-4 units to be established on currently single-family zoned land. The second reduces parking requirements for residential development throughout the city. The third is that it allows for the construction of of 5-6 unit multifamily housing in prior single-family zoned areas, but limit this construction to areas near public transit stations or to those with large lots. While the mechanism notes that this was an "Intensive Zoning Code Effort," the county also made brief changes to their General Plan. A caveat with this effort is that there is a cap of 58-permits each year, until 2028. The latter was likely implemented to appease exclusionary homeowner interests, and seem to work against the scope of the changes implemented by the county. |
| Ashland | Oregon | OR | Municipal Ordinance | Approved | ADU Reform | Accessory Residential Unit Ordinance | Approved on 6/19/2021 | View Source | View Source | View Description The Ashland City Council approved an ordinance that exempted ADUs from the planning application process, so long as they meet two conditions. The first condition is that a given ADU is within or attached to a single family primary dwelling unit. The second condition is that a given ADU is under 500sqft. In conclusion, this ordinance is not a more preferable unconditional ministerial process for ADU approval, but rather a simplification of the planning application process if a given ADU development satisfies certain conditions. |
| Atlanta | Georgia | GA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2018-11 (18-O-1023) | Approved on 5/16/2018 | View Source | View Source | View Description The City Council of Atlanta, following a commissioned team that was formed to assess its zoning code, sought to make substantial changes to the Atlanta Zoning Ordinance. This ordinance was a part of the first phase of those changes, which the city defined as "quick fixes" to the code. This ordinance made three central changes, exactly. The first is that it increased the maximum allowable height of ADUs, the second is that it increased the maximum allowable size of ADUs, and the third is that it clarified accessory uses in residential subdivisions. |
| Atlanta | Georgia | GA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2019-09 (18-0-1581) | Approved on 1/31/2019 | View Source | View Source | View Description The City Council of Atlanta, following a commissioned team that was formed to assess its zoning code, sought to make substantial changes to the Atlanta Zoning Ordinance. This was a part of the second phase of those changes, which the city defined as "medium fixes" to the code. This ordinance did two things, exactly. The first is that it specified the total number of units on a parcel in accommodation of ADUs, and the second is that it removed parking requirements for ADUs. |
| Atlanta | Georgia | GA | Intensive Zoning Code Effort | Early Process | ADU Reform, Plex Reform | Atlanta Zoning 2.0 | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City of Atlanta is engaging in a multi-year zoning code rewrite project. The purpose of this effort will likely be to secure and make more feasible ADU, and Plex development in single-family zoned areas throughout the city; but the exact details of the rewrite remain unspecified, as they are being established in a forward looking process. This zoning code rewrite itself is projected to conclude sometime in the Summer of 2024. |
| Atlanta | Georgia | GA | Municipal Ordinance | Denied/Rejected | ADU Reform | Ordinance No. 21-O-0456 | Rejected on 12/06/2021 | View Source | View Source | View Description The City Council of Atlanta failed to enact an ADU ordinance drafted by Councilmember Farokhi and removed it from consideration. The ordinance would have amended the current language of the zoning code concerning ADUs, and would have made three central changes. First, it would have allowed ADUs to be built or converted throughout a broader scope of the city. Second, it would have increased the maximum allowable size of ADUs. Third, it would have removed the minimum parking requirement. |
| Atlanta | Georgia | GA | Municipal Ordinance | Denied/Rejected | TOD Reform | Ordinance No. 21-O-0454 | Terminated on 12/20/2021 | View Source | View Source | View Description The City Council of Atlanta was considering an ordinance which would have implemented a Transit Oriented Development (TOD) policy throughout the entire city. Since it was pending in committee at the end of the 2021 quadrennial year, and Charter Section 2-407(a) was provided, this ordinance was automatically terminated at the end of the last City Council meeting in December 2021. This ordinance would have worked principally through rezoning transit stops near high traffic stations. Specifically, Low-Density Residential zones within half a mile of high-capacity transit stations would have been upzoned to Multifamily Residential Multi-Use (MR-MU). The outcome was that the ordinance was essentially "referred," meaning filed away, or softly struck down. |
| Auburn | Maine | ME | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 18-04052021 | Adopted on 5/03/2021 | View Source | View Source | View Description The City Council of Auburn Maine adopted an ADU ordinance which made three principal changes. The first is that it expanded permitted ADU types from merely internal or attached ADUs, to detached ADUs. The second is that it removed normal size limits and greatly increased the height limits for established ADUs, so that the accessory unit can ultimately be larger than the principal dwelling. The third is that it specified that these units can be built on both single-family zoned land and also land zoned for duplexes. |
| Auburn | Maine | ME | Municipal Ordinance | Approved | Other Reform | Ordinance No. 19-07182022 | Adopted on 3/21/2022 | View Source | View Source | View Description The City Council of Auburn Maine adopted a form-based code ordinance, which we have characterized as a reform type of Other, in our type classification. This ordinance made two main changes. The first is that it rezoned just over 1,500 acres in the central part of the city to make the land more amenable to mixed-use development. The second is that, instead of implementing many regulations to this district, the city merely set the density standard of this district to 16 dwelling units per acre - which allows for somewhat dense multifamily housing. |
| Austin | Texas | TX | Municipal Ordinance | Approved | Other Reform | Affordability Unlocked Development Bonus Program | Approved on 5/09/2019 | View Source | View Source | View Description The City of Austin approved an ordinance which created an affordable housing density program. This program essentially allow developers to increase density (ie. height, floor-area ratio) and reduce prior administrative restrictions (ie. setbacks, minimum site area, parking and compatibility, etc.), in exchange for them guaranteeing that a certain amount of units be affordable for residents at different income levels. One affordability option is that 50% of the units are affordable to those of 60% the median-family income of the Austin metro area. |
| Austin | Texas | TX | Municipal Ordinance | Approved | Other Reform | Ordinance No. 20231102-028 | Approved on 11/02/2023 | View Source | View Source | View Description The City Council of Austin passed an ordinance to remove minimum parking requirements from the zoning code. This legislation is in line with both the Austin Strategic Mobility Plan and the Austin Strategic Housing Blueprint, which affirms that parking mandates encourage driving, make development more expensive, oversupply parking spots, and reduce the number of housing units created in a given development. |
| Austin | Texas | TX | Municipal Ordinance | Approved | Other Reform | Residential in Commercial Development Program (Ordinance No. 202221201-055) | Effective on 12/12/2022 | View Source | View Description The City Council of Austin put into effect a commercial-to-residential zoning reform that we label as an Other reform. This reform has three major components. First, it []. Second, it []. Third, it []. |
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| Baltimore | Maryland | MD | Municipal Ordinance | Denied/Rejected | Plex Reform | Abundant Housing Act (Ord No. 22-0285) | Rejected on 12/4/2024 | View Source | View Source | View Description The City Council of Baltimore failed to pass an ordinance that sought to lay the way for missing middle housing, particularly through Plex development. Conditional on its adoption, this ordinance would have instituted three changes. First, it would have allowed for low-density multi-family housing, or duplex to fourplex development, on single-family zoned areas. Second, it would have allowed greater density in locations closer to public transportation hubs. Third, it would have removed parking minimums related to residential development. According to the City Council of Baltimore, the final action on the ordinance is dated December 14, 2024, and its status is “Failed - End of Term.” |
| Bastrop | Texas | TX | Intensive Zoning Code Effort | Approved | Other Reform | Bastrop Building Block (B3) Code | Adopted on 11/01/2019 | View Source | View Source | View Description The City of Bastrop adopted an code amendment that removed parking minimums from the zoning code. It is unclear the exact date of adoption of the zoning amendment, but as an extension of the information provided in the referenced document, we have labeled the date as the first of November 2019. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. For more information, see SEC. 6.3.006 PARKING of the B3 Code. |
| Bellingham | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2018-05-009 | Adopted on 3/15/2018 | View Source | View Source | View Description The City Council of Bellingham passed an ADU ordinance which extended the city's prior code. This ordinance made and affirmed three major specifications. First, attached and detached ADUs were permitted on all single-family zoned districts in the city. Second, it specified that ADUs require one additional parking space, unless a waiver is approved through other means. Third, it specified that the application for an ADU must follow a public hearing process, wherein all those residencies within 500ft of a projected construction have an opportunity to attest it. While this ordinance removed some regulatory barriers, the public hearing process may be seen as a crucial limitation of the ordinance. |
| Berkeley | California | CA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 7,751-N.S. | Passed on 1/26/2021 | View Source | View Source | View Description The City of Berkeley passed an ordinance which removed mandatory parking minimums from the zoning code. The purpose and the intentions of the city with this reform were largely based around removing the minimums in order to: A) promote more housing, and B) disincentivize car infrastructure and promote green forms of mobility, in light of the climate crisis. An important context for this reform, besides the broad consensus in planning research showing that parking minimums are not good policy from a housing or climate perspective, is a study by the city found which that over 50% of parking in the city remains nonutilized and vacant. |
| Berkeley | California | CA | General Plan Update | Approved | Plex Reform | Berkeley 2023-2031 Housing Element | Approved on 2/28/2023 | View Source | View Source | View Description The City Council of Berkeley approved their Housing Element, following an initial rejection from the California Department of Housing and Community Development (HCD). The plan itself was initially adopted on January 18, 2023 in the Berkeley City Council, but the update was rejected by HCD because it didn't go far enough in: A) specifying how the city would upzone higher opportunity communities, and B) making technical changes in the permitting process which would make fulfilling the city's building goals more feasible. The new housing element made three central changes. The first is that it allowed property owners to establish plex multifamily units in areas which were before only limited to single-family property. The second is that it removed barriers from the approval process by doing away with public hearing provisions. The third is that it intentionally identified certain streets to upzone, and to specifically focus efforts on for future multifamily development, throughout the city (College, Solano and Shattuck Avenues). It may be expected that these directives will be codified through ordinances hereafter. |
| Boise | Idaho | ID | Intensive Zoning Code Effort | Approved | Plex Reform, ADU Reform, Other Reform | Modern Zoning Code | Approved on 6/15/2023 | View Source | View Source | View Description The City of Boise passed a well-rounded zoning reform, which makes three central changes. First, the zone expands development of the R-1C zone (previously confined to single-family dwellings and duplexes) to accomodate ADUs, duplexes, triplexes and fourplexes. Second, the code sought to prevent speculation and assure affordability by requiring that adding more than 2-units in this prior R-1C district must be joined with such units meeting affordability standards (at 80% of the AMI if the new units are rentals). Third, the code update requires a conditional use permit for multi-family dwellings in mixed use districts that displace vulnerable tenants. |
| Boston | Massachusetts | MA | Municipal Ordinance | Approved | ADU Reform | Text Amendment No. 440 | Passed on 5/08/2019 | View Source | View Source | View Description The City of Boston adopted an ordinance, which codified a prior 18-month long pilot program, that allowed internal ADUs in lots that have 1-3 units. The ordinance itself did not allow for the conversion of an external structure on a single-family lot, nor for the construction of an ADU from scratch. Therefore, due to this ordinance only permitting an ADU so long as it works within the existing dimensions of the primary residence, it might be seen as being limited in comparison to other ordinances, which legalize lot splits and detached ADU construction. |
| Buffalo | New York | NY | Intensive Zoning Code Effort | Approved | Other Reform | Buffalo Green Code | Effective on 4/03/2017 | View Source | View Source | View Description The City Council of Buffalo engaged in a long zoning code rewriting process, which culminated in its Buffalo Green Code; the new code itself is a form-based alternative to strict land-use type restrictions. The code made two large changes. The first is that it allowed for a more varied build environment. The second is that the city removed parking minimums from the code update. While form-based reforms still implicitly depend on exclusionary frameworks of "community character" in order to function, and may therefore be subject to certain limitations, they are generally seen as changes that allow for more flexibility in land use and development, especially when compared with restrictive code-based or Euclidean zoning. |
| Burien | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 724 | Adopted on 12/02/2019 | View Source | View Source | View Description The City of Burien passed an ADU amendment ordinance which made three principal changes to their zoning code. First, it removed the owner occupancy requirement which was earlier a precondition for an ADU approval. Second, it removed the one spot parking minimum for ADUs if the unit is within a 1/4 mile from a transit stop. Third, it allowed 2-ADUs to be permitted on the same lot: one attached and one detached unit. |
| Burlington | Vermont | VT | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 4.06 (ZA #20-03) | Approved on 3/03/2020 | View Source | View Source | View Description The City Council of Burlington amended its zoning code to make ADU construction more viable. This ordinance made three central change. First, it streamlined the application process for ADUs. Second, it removed parking minimums for ADUs. And third, it expanded the maximum size allowed for ADUs, and the capacity for additional lot coverage. |
| Cambridge | Massachusetts | MA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 2022-5 | Passed on 10/24/2022 | View Source | View Source | View Description The City of Cambridge passed an ordinance which removed minimum parking requirements from their zoning code. Specifically, it removed off-street parking requirements that had prior existed as a condition of development. The reasoning for this removal, as much research has shown, is that parking minimums make development more expensive, raise rents, and reduce the total units established for a given project; much research establishes that it is also misuse space, and encourage dependence on automobiles. |
| Cambridge | Massachusetts | MA | Intensive Zoning Code Effort | Approved | Other Reform | 100%-Affordable Housing Zoning Overlay | Adopted on 10/05/2020 | View Source | View Source | View Description The Cambridge City Council approved a 100%-Affordable Housing Zoning Overlay (AHO) designed to allow affordable housing developers to develop affordable housing more quickly, efficiently, and permanently. The overlay was first proposed in 2018 and was discussed and considered through 2019. However, the petition expired on September 30, 2019. Then, the second zoning petition to include the AHO was submitted again in early 2020 and adopted in October 2020. Until this was approved, affordable housing developers faced long and costly permitting issues, often in areas where regulations prevented new affordable development or where they could not compete with market-rate developers who could pay more for land and buildings. The approval of this overlay will allow for the development of higher density, permanent affordable housing than is allowed under existing zoning and has created a review process that will ensure that such housing is approved efficiently. |
| Cambridge | Massachusetts | MA | Municipal Ordinance | Approved | Plex Reform, Other Reform | Ordinance No. 2025-1/Ordinance No. 2025-1 | Approved on 02/10/2025 | View Source | View Source | View Description The Cambridge City Council approved two zoning petitions that allow multifamily housing throughout the city. This eliminates historic exclusive single-family zoning and allows multi-family housing in all neighbourhoods. It also encourages the construction of more housing, particularly income-restricted affordable housing through the city's inclusionary housing program, eliminates requirements that had made it difficult to build multifamily housing, such as minimum lot size, housing unit limits, and maximum floor area, and reduced setback requirements. The Community Development Department indicated that up to 4,800 new units could be created in the proposed zoning. |
| Canandaigua | New York | NY | Municipal Ordinance | Approved | Other Reform | An act to remove minimum off-street parking requirements. | Adopted on 6/05/2020 | View Source | View Source | View Description The City Council of Canandaigua adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance made two changes. First, it removed parking minimums from all uses across the city. Second, it now requires developments which meet certain size requirements to fulfill a parking demand analysis to calculate whether or how much parking is needed for a given development. |
| Carmel | Indiana | IN | Municipal Ordinance | Denied/Rejected | ADU Reform | "Accessory Dwelling Units" Ordinance | Denied on 2/15/2021 | View Source | View Source | View Description The City of Carmel was considering an ordinance which would have made ADUs more numerous and easy to build on single-family zoned land in the city. The ordinance would have accomplished this in two main changes. The first is that it would have reduced the difficulty of the ADU application process by removing the requirement to apply to the Board of Zoning Appeals for approval. The second is that it would have required that 20% of new residential lot development have an ADU. Due to conflict in the council, and dilutions of the original ordinance, the amended ordinance was eventually struck down in the council. The current process for constructing or converting an ADU in the city requires a homeowner interested in this form of development, to apply for approval through the Carmel Board of Zoning Appeals. |
| Chapel Hill | North Carolina | NC | Intensive Zoning Code Effort | Approved | Plex Reform | Land Use Management Ordinance (LUMO) Text Amendment | Approved on 06/21/2023 | View Source | View Source | View Description The Town of Chapel Hill's Council enacted an ordinance amendment to increase the opportunity to provide types of housing in various communities and incorporated it into the Town's zoning ordinance, the Land Use Management Ordinance (LUMO). The changes are intended to address the demand for "missing middle housing" by increasing various types of housing supply, including allowing more multifamily housing to be built in previously single-family zones. |
| Charlotte | North Carolina | NC | General Plan Update | Approved | ADU Reform, Plex Reform | Charlotte Future 2040 Comprehensive Plan | Adopted on 6/21/2021 | View Source | View Source | View Description The City of Charlotte has adopted their Charlotte Future 2040 Comprehensive Plan, which proposed changes to the city's zoning code. The general plan made two major proposals. The first is related to plex development, and proposed allowing duplex to fourplex development on all residential zoned districts across the city. A caveat is that fourplexes would only be permitted in dense areas, and under some affordability conditions. The second proposal was to make ADUs easier to construct around the city's residentially zoned districts. |
| Charlotte | North Carolina | NC | Intensive Zoning Code Effort | Approved | ADU Reform, Plex Reform | Unified Development Ordinance | Adopted on 8/22/2022 | View Source | View Source | View Description The City of Charlotte adopted their Unified Development Ordinance (UDO), which is a consolidation of the Charlotte Future 2040 Comprehensive Plan, as it relates to zoning and development. This ordinance is large and fulfills many of the general plan's proposals, but it made two central changes. The first is that it allowed for duplex, triplex, and (under certain density conditions) fourplex development, on single-family land throughout the city. The second is that is made ADUs easier to construct in residentially zoned districts. An important specification is that though the UDO was adopted in late 2022, it will go into effect on June 1, 2023. |
| Charlottesville | Virginia | VA | General Plan Update | Approved | Plex Reform, Other Reform | Comprehensive Plan | Adopted on 11/15/2021 | View Source | View Source | View Description The City of Charlottesville updated their comprehensive plan, and set the outline for a few prospective changes in the city's zoning code. The three central proposed changes are as follows. First, the plan proposed the development of affordable, healthy and high-opportunity housing. Second, the plan proposed mixed-use and mixed-income development, with an eye towards permitting more diverse housing types by-right. Third, the plan proposed housing development which is geared towards walkability and public transit connection. |
| Charlottesville | Virginia | VA | Intensive Zoning Code Effort | Approved | Plex Reform, Other Reform | Cville Plans Together | Effective on 2/19/2024 | View Source | View Source | View Description The City of Charlottesville, in their Cville Plans Together rewrote their zoning code, focused on implementing prior recommended changes made in the Affordable Housing Plan and Comprehensive Plan. こThis plan involved updating the city's comprehensive plan to include the creation of a focused Affordable Housing Plan, and rewriting the zoning ordinance to implement the Affordable Housing Plan. The Affordable Housing Plan is intended to address the single-family zoning that has accounted for a lot of the land use in the city and historically promoted racial segregation, and to improve exclusive zoning and inadequate housing supply. |
| Chicago | Illinois | IL | Municipal Ordinance | Approved | TOD Reform | Connected Communities Ordinance (Ordinance No. O2022-2000) | Passed on 7/20/2022 | View Source | View Source | View Description The City of Chicago passed the Connected Communities Ordinance, which is a codification of a selection of equity-based improvements from a study made by the city of its preceding TOD policy. The ordinance itself is intended to make three changes. The first is to more equitably site TOD developments, without commensurately creating displacement. The second is to expand the policy's existent financial incentives. The third is to implement different ways of making streets safer for pedestrians, cyclists and transit users, around TOD sites. |
| Chicago | Illinois | IL | Municipal Ordinance | Approved | ADU Reform | Ordinance No. SO2020-2850 | Adopted on 12/16/2020 | View Source | View Source | View Description The City of Chicago adopted an ordinance which permitted ADU construction in 5-pilot areas across the city. According to the ordinance, all R-residential zoned areas, except for the residential single-family zoned areas (RS-1), are permitted to have ADUs. Furthermore, ADUs may be accessory to a primary dwelling unit, or internal to it, or constructed on multifamily zoned districts as well; in the latter case, depending on the density of the lot, the ordinance permits up to 4-interior ADUs. The ordinance also has affordability standards which go into effect after the construction of 2 or more units. |
| Cincinnati | Ohio | OH | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 266-203 | Adopted on 6/26/2023 | View Source | View Source | View Description The City of Cincinnati adopted an ADU Reform. This reform made four central changes. First, it made both attached and detached accessory dwelling units (ADUs) permitted by-right throughout single-family zoned lots in the city. Second, it specified that owner-occupancy is a requirement for the building and renting out of an ADU. Third, it specified that no additional on-site parking is required for an ADU to be established, commensurate with its conversion or construction. And lastly, it specified that the owner of the primary residence can rent the unit out as a short-term rental. |
| Cincinnati | Ohio | OH | Intensive Zoning Code Effort | Approved | Plex Reform, TOD Reform, Other Reform | Connected Communities | Passed on 6/05/2024 | View Source | View Source | View Description The City of Cincinnati has passed Connected Communities, a series of zoning code amendments aimed at improving housing supply, improving transportation corridors, easing parking requirements, and strengthening urban design standards. For example, it allows duplexes, triplexes, and quadplexes in various zoning districts, and it eliminates the minimum lot size requirements for these residential structures. It also includes relaxing or eliminating minimum parking requirements in various areas, and in certain zoning districts, allowing buildings to exceed the maximum height of the underlying zoning district by an additional 12 feet, except in single-family districts. In this way, Connected Communities includes a number of amendments to increase housing density, support transit-oriented development, and relax restrictive zoning rules. |
| Columbus | Ohio | OH | Intensive Zoning Code Effort | Approved | Other Reform | Columbus Zoning Code Update | Enacted on 7/29/2024 | View Source | View Source | View Description The City of Columbus is in an intensive process of rewriting its zoning code, and phase one of the Columbus Zoning Code Update was approved. The city had not changed its zoning code in the last 70 years, and the update modernizes Columbus' zoning code, relaxes parking regulations, enhances walkability, ensures sustainability, and strengthens protection of the historic district. It also encourages transit-oriented development while improving design standards and administrative clarity. This update also recommends the construction of taller buildings to promote increased housing density. While such changes will have a wide-ranging impact, those in need of affordable housing are likely to be affected the most. |
| Corvallis | Oregon | OR | Municipal Ordinance | Approved | Other Reform | Vehicle Parking Ordinance (Ordinance No. 2022-28 ) | Approved on 11/22/2022 | View Source | View Source | View Description The City of Corvallis approved an ordinance that removed parking minimums across the city. This ordinance is a part of the city's work to align its planning governance with the Oregon Climate-Friendly and Equitable Communities Program, which established the goal of reducing Oregon's transportation down to 75% of 1990 levels by 2050. The state is behind and currently on track to reduce its transportation pollutants by 20% by the year 2050. The state views the removal of parking mandates as a means to get about their transportation emissions goals. Given that the state doesn't require the compulsory removal of parking mandates at the city level (but rather encourages it and grants those that remove parking mandates more 'flexibility'), we can view Corvalis' efforts as a distinctive municipal zoning reform that warrants its addition into the tracker. |
| Corvallis | Oregon | OR | Intensive Zoning Code Effort | Approved | ADU Reform, Plex Reform | Land Development Code Amendments (Ordinance No. 2022-12) | Effective on 6/30/2022 | View Source | View Source | View Description The City of Corvallis passed and implemented an intensive zoning code effort, that made three central changes. First, it requires that every residential parcel accommodates at least a duplex. Second, it specifies that many more residential areas have the capacity for more dense Plex capacity: triplexe and fourplexes, along with cottage courts and townhouses. Third, it legalizes accessory dwelling units (ADUs) on attached and detached single dwelling units, but would not allow their use on other more dense residential types and would not allow them on lots that have utilized a middle housing land division (essentially a lot-split characteristic of that seen in California). |
| Culver City | California | CA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 2022-008 | Adopted on 10/24/2022 | View Source | View Source | View Description The City Council of Culver City adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance made three changes. First, it formally removed parking minimums from the zoning code while also specifying that such a removal does not preclude the provision of parking for development. Second, it streamlined administrative processes for alternative parking methods. Third, it shifted bicycle parking requirements throughout the city. The most important change, clearly, and the one most constitutive of zoning reform is the first. |
| Dallas | Texas | TX | General Plan Update | Approved | Plex Reform, Other Reform | ForwardDallas Land Use Update | Adopted on 09/25/2024 | View Source | View Source | View Description The City Council of Dallas approved “ForwardDallas 2.0”, an update to the 2006 Comprehensive Plan (ForwardDallas is a guidance plan, not a zoning document). The ForwardDallas has five main goals. First, it encourages Transit Oriented Development (TOD) by enabling compact, walkable mixed-use communities near transportation hubs for better connectivity. Second, the initiative expands attainable housing options, particularly near job centers and transit areas, to meet the diverse needs of residents. Third, it supports economic revitalization by promoting equitable development in neighborhood centers, commercial corridors, and employment districts. Fourth, it aims to protect communities from environmental hazards while promoting sustainability through conservation and proactive policies. Lastly, it enhances urban design by shaping safe, functional, and vibrant public spaces that reflect the character of diverse communities. |
| Decatur | Georgia | GA | Municipal Ordinance | Approved | Plex Reform | "Missing Middle Housing" Ordinance | Approved on 2/06/2023 | View Source | View Source | View Description The Decatur City Commission, following a recommendation from its Affordable Housing Task Force, approved an ordinance which legalized Plex development on single-family zoned districts. This ordinance made at least two significant changes to the city's prior code. The first is that it allowed duplex and (up to 4-unit) walk-up flats to be built in single-family zoned areas, and the second is that it allowed single-family homes themselves to be converted into these missing middle housing types. |
| Denver | Colorado | CO | General Plan Update | Approved | ADU Reform, TOD Reform | BluePrint Denver | Adopted on 4/22/2019 | View Source | View Source | View Description The City Council of Denver, as a part of their Comprehensive Plan 2040, created the BluePrint Denver document, which is a land use and transportation supplement of the broader general plan. BluePrint Denver created recommendations to allow Plex development in single-family zoned areas in the city, as well as changes which made ADU construction a target for the city, and a more feasible option for creating housing across greater segments of the city. |
| Denver | Colorado | CO | Intensive Zoning Code Effort | Approved | ADU Reform, TOD Reform | Advancing Equity in Rezoning | Enforced on 02/25/2025 | View Source | View Source | View Description The Denver City Council approved the “Advancing Equity in Rezoning” initiative. This initiative aims to make the rezoning process more transparent, equitable, and accessible by improving public engagement and revising review criteria. It seeks to update and restructure rezoning criteria to remove outdated language, simplify the process, and ensure decisions align with citywide goals, informed by community input. Additionally, it enhances public participation by expanding notification requirements to tenants, improving outreach materials, and making rezoning information more accessible online. “BluePrint Denver,” the city's land use and transportation plan, which is a supplement to the Comprehensive Plan 2040, called for enabling at least three central zoning reforms. The first is allowing plex development on single-family lots, the second is expanding where ADUs are permitted across the city, and the third is creating incentive structures for rental housing development in transit-dense areas. |
| Draper | Utah | UT | General Plan Update | Approved | ADU Reform, TOD Reform | Ordinance No. 1561 | Adopted on 9/20/2022 | View Source | View Source | View Description The City Council of Draper has proposed a series of zoning reforms in order to meet affordability needs, and the city's projected growth needs. These proposals span at least three central areas of intention. First, the code should be amended to be more conducive to attached and detached ADU development, by removing regulations and decreasing vagueness in the code. Second, the code should allow more transit oriented development (TOD) in commercial or mixed use areas. Third, there should be incentivizes for TOD and reduced impact fees for moderate income housing construction. An important note is that this general plan update process is related to Utah's HB 462 law, which requires jurisdictions to update their plans to be in line with moderate-income housing construction requirements. Though this local ordinance is influenced by a state-based context, it is still substantial enough in its scope to be listed in our tracker. |
| Durham | North Carolina | NC | Intensive Zoning Code Effort | Approved | ADU Reform, Plex Reform, Other Reform | Expanding Housing Choices (EHC) | Effective on 10/01/2019 | View Source | View Source | View Description The City and County of Durham led a years long effort, which included public input, to amend their Unified Development Ordinance. The outcome was the Expanding Housing Choices (EHC) program, which legalized duplexes, and ADUs on all residential zoning districts (as well as allowed for townhomes and low density multifamily housing). The effort also removed regulatory barriers for ADUs, reduced the minimum lot size to 2,000sqft, and allowed for lot splits. A note is that with the lot split amendment, it's possible to have an ADU and duplex construction on one lot, and an ADU and single family housing construction for the other lot, respectively. |
| East Lampeter Township | Pennsylvania | PA | Municipal Ordinance | Approved | ADU Reform | Ordinance 330 | Approved on 8/21/2017 | View Source | View Source | View Description The East Lampeter Township updated their zoning ordinance to implement an ADU reform. This ordinance made three central changes. The first is that it allowed accessory dwelling units (ADUs) by right in every zoning district where residential housing is allowed. The second is that is specified that interior, attached and detached ADUs are all permitted throughout all residential areas. The third is that it specified that 1 off-street parking spot is required to establish an ADU. It is unclear whether owner-occupancy is required to build or rent an ADU. (One of the sources which we link is the entire zoning code, as the township didn't have an individual ordinance for these changes on file.) |
| El Paso | Texas | TX | Intensive Zoning Code Effort | Early Process | Plex Reform, TOD Reform, Other Reform | Inclusive Neighborhoods | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City of El Paso is considering an intensive zoning code update which may make three central changes. First, it may allow missing middle housing, or housing in the Plex range, likely in low-density residential districts in the city. Second, it may remove minimum parking requirements for new housing. Third, it may institute a transit oriented development (TOD) policy to build more dense housing, with density incentives for affordability, near transit infrastructure. It is unclear how this effort will develop and finalize, but more will be decided as it moves through the public comment and redrafting process. |
| Englewood | Colorado | CO | Intensive Zoning Code Effort | Approved | ADU Reform, Other Reform | CodeNext: Unified Development Code | Approved on 09/25/2023 | View Source | View Source | View Description The City Council of Englewood adopted “CodeNext,” a comprehensive rewrite of the Unified Development Code that regulates zoning and development in the city.This is the first comprehensive review of the city's regulations on new construction and redevelopment in 20 years. There were many changes in zoning and land use specifically regarding ADUs. These include:allowing ADUs to be built in R-1-A and R-1-B zoning for the first time; allowing up to three ADUs to be built in R2B, MUR3A, MUR3B, MUR3C, and R2A’s corner lots, provided that two ADUs are attached to the main residence; the elimination of owner occupancy requirements for ADUs; the elimination of additional parking requirements for ADUs, and an increase in ADU size allowances. In addition to changes to ADUs, the reform also includes a loosening of the definition of a household to four unrelated adults and their dependents, a lowering of the lot size standard to promote the construction of smaller homes with the aim of increasing affordable housing and rental income, and the design of roads for pedestrians and cyclists. |
| Evanston | Illinois | IL | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 86-O-20 | Adopted on 9/29/2020 | View Source | View Source | View Description The City of Evanston adopted an ADU ordinance which made three central changes. The first is that it permitted both attached and detached ADUs in single-family zoned areas throughout the city. The second is that it specified a maximum size of 1,000 sqft for ADUs, which is slightly greater than most other jurisdictions. The third is that it specified that no additional parking space is required for adding an ADU to a lot. |
| Everett | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 3534-17 | Adopted on 2/15/2017 | View Source | View Source | View Description The City of Everett passed an ADU ordinance which made one central change to their zoning code. The principal change was that detached ADUs were permitted on single-family zoned land, whereas before, only attached/interior ADUs were permitted. A limitation with the ordinance is that it does not address the effects of public hearings on ADUs, and it did not seek to further insulate the establishment of ADUs from the public comment process. |
| Everett | Washington | WA | Intensive Zoning Code Effort | Approved | ADU Reform | Ordinance No. 3774-20 (Rethink Zoning) | Adopted on 11/04/2020 | View Source | View Source | View Description The City of Everett passed an ADU ordinance which made at least three central changes to their zoning code. These changes were primarily regulatory. First, the ordinance updated definitions to be more understandable. Second, the ordinance increased the maximum size of ADUs from 800sqft to 1,000sqft. Third, the ordinance expanded the list of zoning districts wherein ADU construction is allowed. |
| Fayetteville | Arkansas | AR | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 6076 | Approved on 8/07/2018 | View Source | View Source | View Description The City Council of Fayetteville adopted an ordinance which moderated prior developmental provisions on Accessory Dwelling Units (ADUs) across the city. There are three main parts to this ordinance, which together constitutes a significant change in the jurisdiction's ADU policy. The first is that two ADUs are permitted per residential lot, one attached and one detached. The second is that the maximum lot size for an ADU is now 1,200 sf (up from the 600 sf of the prior ordinance). The third is that an ADU requires 1 additional off-street parking space for units above 800 sf. |
| Gainesville | Florida | FL | Municipal Ordinance | Approved | Plex Reform | Ordinance No. 211358 | Adopted on 10/17/2022 | View Source | View Source | View Description The City Commision of Gainesville passed two essential ordinances which essentially removed single-family zoning in the jurisdiction. This is the most important ordinance of the two which we include in our tracker, and it did a few things. The first is that it replaced the Residential Single Family districts with a broader Neighborhood Residential (NR) zoning district. The second is that it established that in the NR district, plex development (inclusive of duplexes, triplexes, and in some cases, fourplexes) is permitted. The third is that it established that its provisions aren't subject to a sunset, but will last in permanence, into the future; in line with this, the ordinance amends both the zoning code, as well as the general plan. (The other ordinance which we do not record in our tracker is Ordinance No. 211359.) |
| Gainesville | Florida | FL | Municipal Ordinance | Approved | Other Reform | Ordinance No. 211262 | Adopted on 11/22/2023 | View Source | View Source | View Description The City Commission of Gainesville adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance made three changes. First, it removed parking minimums throughout the entirety of the city and for all land-use types. Second, it established a parking maximum. Third, it requires that any development exceeding 200 parking spaces needs to construct a structured parking facility along with the main development. |
| Gainesville | Florida | FL | Municipal Ordinance | Denied/Rejected | Plex Reform | File No. 2023-162 | Rejected on 4/19/2023 | View Source | View Source | View Description The City Commision of Gainesville, newly seated following the local election, set intentions to reverse the prior ordinances which eliminated single-family zoning in the city. Following the adoption of the ordinances, the city received threats of looming legal challenges from the state of Florida, principally the state's Department of Economic Opportunity. The city also received resistance from local community members. The Commision has formally reversed its prior ordinances with 3-ordinances based around restoring exclusionary zoning, and specifically, with the purpose of removing the formerly instated 'Neighborhood Residential' district from the city's zoning code. Gainesville is likely the most prominent case wherein a jurisdiction instituted a positive zoning reform, and then reversed and/or rejected it eventually, due to political factors. |
| Gastonia | North Carolina | NC | Municipal Ordinance | Approved | Other Reform | Ord. No. 21-737 | Adopted on 5/18/2021 | View Source | View Source | View Description The City Council of Gastonia adopted an ordinance that removed mandatory parking minimums from the zoning code, and replaced them instead with parking maximums. These changes to the parking standards in the zoning code run across all commercial, industrial and residential uses, with the exception of bicycle parking. |
| Gilman | Wisconsin | WI | Municipal Ordinance | Approved | Other Reform | Ordinance No. – | Passed on 1/01/2011 | View Source | View Source | View Description The Village Board of Gilman adopted an ordinance that removed parking minimums from the zoning code. It is unclear what the name or exact date of the ordinance is, but as an extension of the information provided in the zoning code, we have labeled the date as the first of January 2011. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. For more information, see Title XV: Land Use, Chapter 157: Zoning, Section 157.035(d) of the Gilman Code of Ordinances. |
| Gloucester | Massachusetts | MA | Intensive Zoning Code Effort | Denied/Rejected | Plex Reform, ADU Reform | RZ2021-003 | Rejected on 05/17/2022 | View Source | View Source | View Description The Gloucester City Council rejected RZ2021-003, a series of zoning amendments that would have amended regulations related to residential uses and housing construction requirements. The proposal was initially proposed in line with the goals of the Housing Production Plan, a tool that identifies goals related to the city's housing development targets. Early proposals included increasing the number of affordable housing units, amending regulations related to single-family, multi-family, and ADU housing. The final proposals included reducing the minimum lot size in multifamily zones and increasing the maximum building height for single-family, two-family, and multifamily housing. The City Council voted four months after the initial proposed amendments were made, and rejected all of these proposals. |
| Grand Rapids | Michigan | MI | Intensive Zoning Code Effort | Approved | Other Reform | Grand Rapids Zoning Ordinance | Passed on 11/05/2007 | View Source | View Source | View Description The City Council of Grand Rapids passed a form-based code throughout the entirety of the city. The purpose of this early form-based reform was to allow more multi-family construction in lower density residential areas, and provide more flexible uses for property owners and businesses. While form-based reforms still implicitly depend on exclusionary frameworks of "community character" in order to function, and may therefore be subject to certain limitations, they are generally seen as changes that allow for more flexibility in land use and development, especially when compared with restrictive code-based or Euclidean zoning. |
| Grand Rapids | Michigan | MI | Municipal Ordinance | Approved | Plex Reform | Ordinance No. 2019-09 | Adopted on 3/26/2019 | View Source | View Source | View Description The City Council of Grand Rapids passed a set of ordinances which changed its zoning code in three considerable ways. This is one of those ordinances, and it focused principally on Plex development on single-family land. This ordinance instituted two major changes. The first is that it permitted the construction or conversion of duplexes on corner lots in single-family zoned areas. The second is that it reduced the square footage requirements for these corner lot duplexes. |
| Grand Rapids | Michigan | MI | Municipal Ordinance | Approved | TOD Reform, Other Reform | Ordinance No. 2019-10 | Adopted on 3/26/2019 | View Source | View Source | View Description The City Council of Grand Rapids passed a set of ordinances which changed its zoning code in three considerable ways. This is one of those ordinances, and it focused principally on inclusionary zoning and incentivizing rental housing construction near transit. The ordinance established three major sets of bonuses for certain rental housing construction. The first are configured to increase affordable housing construction. The second are configured to increase rental housing construction near transit lines. And the third are configured to increase mixed-income housing. |
| Grand Rapids | Michigan | MI | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2019-11 | Passed on 3/26/2019 | View Source | View Source | View Description The City Council of Grand Rapids passed a set of ordinances which changed its zoning code in three considerable ways. This is one of those ordinances, and it focused principally on ADU development on single-family land. This particular ordinance has a major limitation, in that it instituted a provision for a public hearing process, which is a process wherein neighbors within 300ft of a prospective ADU development are notified, and can delay the project through public hearings. This provision is likely to reduce the effectiveness of the ordinance, and limit the extent to which ADUs may be realized in the city. Though this is the case, even with the current public hearing provision, the ADU application process is easier than it was earlier in the city, wherein there was a special land use application process required for ADUs. |
| Greenfield | Massachusetts | MA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. FY 17-024 | Adopted on 8/17/2016 | View Source | View Source | View Description The City Council of Greenfield adopted an ADU ordinance which allowed both attached and detached ADUs in single-family land across the city. The major limitation of this ordinance was that it required a special permit in order for an ADU to be established in any given lot. The special permit process, as opposed to a ministerial review process, is not enclosed from community input - so by its nature, this first ordinance opened up a space in the approval process for community obstruction, which had the outcome of reducing the effectiveness of this measure. |
| Greenfield | Massachusetts | MA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. FY 21-026 | Adopted on 11/18/2020 | View Source | View Source | View Description The City Council of Greenfield adopted an ADU ordinance which amended their prior ADU policy. The main change that this ordinance made was that it removed the requirement for securing a special permit for attached and internal ADUs, which the earlier ADU ordinance had instated, and which generally makes establishing ADUs more difficult. A caveat is that a detached ADU still requires a special permit. This ordinance can be summarized in three parts. First, it allows both attached and detached ADUs on single-family zoned land. Second, it requires owner occupancy for establishing and continuing to rent an ADU. And third, it requires 2 off-street parking spots for a new ADU. |
| Hartford | Connecticut | CT | Municipal Ordinance | Approved | Other Reform | Amendment of 11-28-2017 | Adopted on 11/28/2017 | View Source | View Source | View Description The City of Hartford adopted an ordinance which removed mandatory parking minimums from the zoning code. This change occurred following more more piecemeal, yet extensive, policy from the city in the past, which saw the removal of parking minimums in downtown, as well as the removal of parking minimums for retail and service commerce across the entirety of the city. |
| Holladay | Utah | UT | General Plan Update | Approved | ADU Reform, Other Reform | Text Amendment – General Plan, Chapter 5: Moderate Income Housing | Adopted on 9/15/2022 | View Source | View Source | View Description The City Council of Holladay proposed a study or implementation of several items related to housing and zoning. The most salient intentions are as follows. First, the city will allow for higher density and moderate income housing. Second, the city will reduce regulations and fees associated with moderate income housing, and make efforts for infill development in residential areas. Third, the city will study the outcomes of reducing parking minimums in residential areas. And fourth, the city will study the current existing impediments for building or converting attached and detached ADUs. An important note is that this general plan update process is related to Utah's HB 462 law, which requires jurisdictions to update their plans to be in line with moderate-income housing construction requirements. Though this local ordinance is influenced by a state-based context, it is still substantial enough in its scope to be listed in our tracker. |
| Houston | Texas | TX | Municipal Ordinance | Approved | Other Reform | Ordinance No. 2013-343 | Approved on 4/24/2013 | View Source | View Source | View Description The City of Houston adopted a land-use reform which reduced the minimum lot size of single-family zoned parcels throughout a large portion of the city in 2013. This reform is much like the earlier 1999 adopted effort which reduced the minimum lot size from 5,000 sqft to 1,400 sqft within the I-610 loop; the only difference is that the earlier reform confined the minimum lot size reduction to the area of the city within the loop, while the 2013 reform affected single-family parcels in the entirety of the city outside of the highway boundary. While Houston is unique out of many American cities in that it doesn't have formal Euclidean zoning, it nevertheless still has land-use developmental standards which could constrain or allow for multifamily housing development and/or preferential treatment towards certain tenure types. It can be noted that the minimum lot size reform has allowed for more variegated tenure types, and more multifamily housing development, in areas which were, before the reform, predominantly concentrated with single-family dwellings. |
| Hudson | New York | NY | Municipal Ordinance | Approved | Other Reform | Local Law No. 2-2019 | Adopted on 6/18/2019 | View Source | View Source | View Description The Common Council of Hudson adopted an ordinance that removed parking minimums from its zoning code. The current code now establishes no minimum number of parking spots needed for new developments, but now leaves it up to the developer to determine parking demand and allocation, across all land-use types in the entirety of the city. |
| Iowa City | Iowa | IA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 21-4866 | Adopted on 11/05/2021 | View Source | View Source | View Description The Iowa City Council adopted an ordinance which instituted a form-based code for 900 acres of residential land in the South District of the city. The ordinance itself was passed with the intention of creating capacity for mixed-use and missing middle housing such as duplex and fourplexes, in the area. A limitation with this ordinance is that it only permits form-based code in a small area of the city, within the South District in particular, and not throughout the entire jurisdiction. |
| Iowa City | Iowa | IA | Municipal Ordinance | Approved | Plex Reform, ADU Reform | Case No. REZ23-0001 | Passed on 10/17/2023 | View Source | View Source | View Description The Iowa City Council adopted an ordinance which made two central changes. First, it made duplexes an allowed use in prior single-family zoned parcels (specifically RS-5 low-density, and RS-8 medium-density single-family districts). Second, it allowed ADUs in single-family zoned parcels and also instituted a series of adjacent ADU changes: removing minimum parking requirements for ADUs, expanding allowable ADU size, and removing ADU owner-occupancy requirements. |
| Jackson | Tennessee | TN | Municipal Ordinance | Approved | Other Reform | City Zoning Ordinance - Elimination minimum parking requirements | Adopted on 10/05/2021 | View Source | View Source | View Description The City of Jackson adopted an ordinance that removed parking minimums from the zoning code. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. |
| Jacksonville | Florida | FL | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2022-448-E | Approved on 11/9/2022 | View Source | View Source | View Description The City Council of Jacksonville approved an ordinance, called the "Keeping Families Together Act," which allowed detached or attached ADUs on single-family zoned areas. A limitation with the ordinance is that an ADU is not permitted without exception, and may be denied due to a homeowner association rules for a neighborhood. So while this ordinance allows ADUs, its method of permitting doesn't preempt other local restrictions which may reduce its effectiveness. |
| Jersey City | New Jersey | NJ | Municipal Ordinance | Approved | Other Reform | Affordable Housing Overlay (Ord. 22-084) | Passed on 10/13/2022 | View Source | View Source | View Description The City Council of Jersey City passed an ordinance which instituted an Affordable Housing Overlay (AFO) zone throughout the city. This zone carried with it a few general changes. The first is that it allowed multi-unit development in previously solely single-family zoned area. The second is that it instituted an two-tiered inclusionary zoning mandate, which alotts 10-15% affordability with added density bonuses and regulatory reductions for developers, dependent on neighborhood socio-economics. The third is that it required LIHTC development, or rental housing built using the low-income housing tax credit, to build with a 20% affordability standard. It is unclear the extent to which this overlay covers a considerable scope of the jurisdiction. |
| Jersey City | New Jersey | NJ | Municipal Ordinance | Approved | ADU Reform, Plex Reform | Ordinance No. 23-103 | Adopted on 10/25/2023 | View Source | View Source | View Description The Municipal Council of Jersey City has approved a proposed amendment that will affect residential zoning. This amendment includes: the creation of new RH-1 (Residential Housing District (large lots)), RH-2 (Residential Housing District (typical lots)), NC-1 (Neighborhood Commercial District 1), NC-2 (Neighborhood Commercial District 2), and NC-3 ( Neighborhood Commercial District 3) districts; the relaxation of ADU requirements in RH-1, RH-2, R-1 (Neighborhood Housing District) and R-2 (Multi-Unit Attached Housing District (four stories or less)) districts to increase the options for affordable housing; the approval of multifamily housing in R-1 districts, which previously only allowed single-family and duplexes. |
| Kansas City | Missouri | MO | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 220698 | Passed on 9/15/2022 | View Source | View Source | View Description The City Council of Kansas city approved an ADU ordinance. This ordinance made three central changes. The first is that is permitted attached and detached ADUs on all lots with a detached primary dwelling, which are essentially all single-family zoned districts. The second is that it instituted an owner occupancy requirement. The third is that it specified that additional parking isn't required for ADUs. |
| Kenmore | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 20-0510 | Adopted on 9/14/2020 | View Source | View Source | View Description The City of Kenmore passed an ADU ordinance which made four central changes to its zoning code. First, it allowed one ADU on all single-family zoned lots. Second, it specified that no additional parking spot need be added as a requisite for ADU approval. Third, it specified that owner occupancy is only required for the first 6-months following the completion of an ADU. And fourth, it allowed ADU size to vary from 600sqft to 1,500sqft, depending on the lot size wherein it would be established. |
| Kirkland | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. O-4715 | Adopted on 3/17/2020 | View Source | View Source | View Description The City of Kirkland passed an ADU ordinance which made three central changes to its zoning code. First, it allowed 2-ADUs on a single-family zoned lot, of either attached and detached, or two of either kind. Second, it limited the parking requirement, in cases where there are 2-ADUs on a single lot, to 1 spot. Third, it removed the owner occupancy requirement for the ADU approval process. |
| Knoxville | Tennessee | TN | Municipal Ordinance | Approved | Plex Reform | Missing Middle Housing Plans | Approved on 2/06/2024 | View Source | View Source | View Description The City of Knoxville passed the Missing Middle Housing plan that includes new zoning codes specific to Middle Housing, which has multiple dwelling units in a single-family-sized building. In the code, Middle Housing development is permitted in RN-1, RN-2, RN-3, and RN-4 zoning districts located in Traditional Neighborhood Residential (TDR). This code aims to increase the options for housing and enable more flexible land development. |
| Lafayette | Louisiana | LA | Municipal Ordinance | Approved | Other Reform | Lafayette Downtown Code | Amended on 3/01/2015 | View Source | View Source | View Description The Lafayette City Council passed a form-based amendment to their downtown code. The code update implemented a form-based design, which centers the physical form of a place as opposed to a concrete code, to encourage mixed-use development. A limitation with this code update to the Downtown Plan is that the revision itself, clearly, only pertains to the downtown area of the city, and it does not at all alter single-family zoning throughout the entirety of the city. |
| Laramie | Wyoming | WY | Municipal Ordinance | Approved | ADU Reform | Enrolled Ordinance No. 1807 | Approved on 4/19/2022 | View Source | View Source | View Description The City Council of Laramie passed an ADU ordinance which made three central changes. First, it allowed both attached and detached ADU construction in single-family zoned areas. Second, it specified that only one ADU may be established on a given lot. Third, it specified that the maximum square footage of the ADU should be less than 1,200sqft. |
| Lexington | Kentucky | KY | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 102-2021 | Passed on 10/28/2021 | View Source | View Source | View Description The Urban County Council of the Lexington-Fayette Urban County Government, as a codification of their 2018 Comprehensive Plan, passed an ordinance focused on ADU reform in single-family zoned areas. This ordinance specifically allowed for the conversion of detached ADUs such as garages or barns, as well as construction of exterior and internal ADUs that are attached to a primary dwelling. Both types of ADUs are only permitted in single-family zoned areas. An important note is that the ordinance does require a pre-application conference with the planning department, before submitting a building permit application for the ADU. |
| Lexington | Kentucky | KY | Municipal Ordinance | Approved | Other Reform | Ordinance No. 113-2022 | Adopted on 10/27/2022 | View Source | View Source | View Description The Urban County Planning Commission of Lexington-Fayette County adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance made three changes. First, it consolidated all of the disparate locations of the code where parking standards were mentioned. Second, it removed the minimum parking standards for new developmental projects. Third, it increased tree canopy and vehicle use requirements for parking lots. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. |
| Los Angeles | California | CA | Ballot Measure | Approved | TOD Reform | Build Better LA Initiative | Approved on 11/7/2016 | View Source | View Source | View Description In the City of Los Angeles, ACT-LA, a coalition of organizations focused on transit, housing and labor, organized to get Measure JJJ on the 2016 ballot. The measure itself passed in November 2016, and resulted in the amendment of the LA Municipal Code which created the Transit Oriented Communities (TOC) program, which is a part of the larger Build Better LA Initiative. This program itself instituted an incentive system to create more dense construction of rental housing near major transit corridors and stations. An important feature of the program is that it mandated a certain share of affordable housing in each development for residents at different income brackets, which is part and parcel of its inclusionary requirement. Lastly, the program instituted hiring preferences for local labor if the building project meets certain conditions. |
| Louisville | Kentucky | KY | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 092, Series 2021 | Passed on 6/24/2021 | View Source | View Source | View Description The Louisville Metro Council passed an ordinance which allowed both attached and detached ADU construction by-right in the metro, with special standards. A prior version of the code merely allowed ADUs to be established through a conditional-use permitting process, which made it considerably more difficult for them to be established. The ADU ordinance made three central changes. The first is that it allowed ADUs by-right with certain special standards. The second is that it created a provision deterring ADU construction or conversion for an absentee landlord. The third is that it prohibited ADU construction in environmentally constrained areas. |
| Louisville | Kentucky | KY | Intensive Zoning Code Effort | Early Process | Plex Reform, Other Reform | Land Development Code Reform | Ongoing as of 2/28/2025 | View Source | View Source | View Description The Louisville Metro Council is currently in early stages of implementing its Land Development Code (LDC) update, which will codify some of the changes established in their Plan 2040. In this code update, single-family zoning reform is situated as a priority. While it is unclear exactly the extent to which this general plan will considerably change the ubiquity of single family zoning in the jurisdiction, or land-use provisions more generally, the intention established in the planning process appears to be two-fold. First, the zoning code update will focus on missing middle housing, which may be constitutive of Plex reform, whereby the allowed density of single-family zoned areas are increased marginally. Second, the zoning code update will focus on establishing new form-based regions within the jurisdiction. Specified details of these efforts will be confirmed upon the adoption of the code update. |
| Madison | Wisconsin | WI | Municipal Ordinance | Approved | ADU Reform | Ordinance No. ORD-21-00087 | Effective on 12/07/2021 | View Source | View Source | View Description The City Council of Madison passed an ADU ordinance which significantly changed their prior precedent concerning this building type. There are three central changes made by this ordinance. First, it made ADUs a permitted use across all residential districts, instead of merely a "conditional" use. Second, it increased the maximum size of ADUs from 700sqft to 900sqft. Third, it redrafted the code language to make it more clear and specific. |
| Madison | Wisconsin | WI | Municipal Ordinance | Approved | TOD Reform | Ordinance No. ORD-23-00013 | Approved on 1/17/2023 | View Source | View Source | View Description The City of Madison adopted a Transit Oriented Development overlay zoning district that made four central changes. The first is that it allowed for more dwelling units as permitted uses in TOD areas. The second is that it increased the permitted height, now requiring a two-story minimum height, and also increased dwelling unit counts. The third is that it eliminated vehicle parking minimums, and also reduces vehicle parking maximums. The fourth is that it implemented a more stringent building form and site layout regulation for auto-oriented uses. This overlay extends throughout a large swath of the city (about 15% of all land), and is a considerable move by the city to institute a TOD throughout their jurisdiction. |
| Maplewood | New Jersey | NJ | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 3008-20 | Adopted on 10/20/2020 | View Source | View Source | View Description The Township Committee of Maplewood adopted an ADU ordinance which made three central changes. The first is that it permitted ADUs throughout low-density residential zoned areas in the township. The second is that it specified that owner-occupancy is required to establish an ADU. The third is that it established that there is a maximum limit of one ADU per lot. |
| Media | Pennsylvania | PA | Intensive Zoning Code Effort | Approved | Other Reform | Ordinance No. 1161 of 2023 | Enacted on 4/20/2023 | View Source | View Source | View Description The Borough Council of Media enacted an intensive update to their zoning code, wherein they implemented a form-based code throughout the borough's residential districts. This is constituted in the tracker as an 'Other' reform. The desiderata of this reform from the perspective of the Council was to manage development pressure and make planning infrastructure for affordable housing more feasible. |
| Milwaukee | Wisconsin | WI | Intensive Zoning Code Effort | Late Process | Plex Reform, ADU Reform, TOD Reform | Growing MKE | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City of Milwaukee is in the process of an intensive zoning code effort which may update its zoning code in four central ways. First, the effort intends to allow Plex (duplex and triplex) development on prior low-density residential parcels throughout the municipality – and then it may allow fourplex development on prior duplex-limited parcels. Second, the effort intends to allow 'by-right' approval for ADUs on all residential parcels. Third, the effort may also allow more dense multi-family housing in areas close to transit and in commercial corridors, which constitutes a transit oriented development (TOD) reform. Fourth and last, the effort may also remove minimum parking requirements for new housing. |
| Minneapolis | Minnesota | MN | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2014-116 | Approved on 12/08/2014 | View Source | View Source | View Description The City of Minneapolis passed a series of ordinances to permit ADUs throughout the city. Due to the piecemeal nature of these ordinances, and the fact that only comprehensively do they really amount to an ADU reform, we have identified the single most important ordinance out of the series of 7-ordinances present in the broader effort. The ordinance made three central changes. The first is that it allowed ADUs on what was prior single-family zoned land throughout the city. The second is that it specified an owner-occupancy requirement for the construction or conversion of an ADU. The third is that it specified that no additional parking spot need be required for ADUs. |
| Minneapolis | Minnesota | MN | General Plan Update | Approved | ADU Reform, Plex Reform, Other Reform | Minneapolis 2040 Plan | Adopted on 10/25/2019 | View Source | View Source | View Description The City of Minneapolis adopted the Minneapolis 2040 Plan, which prospectively eliminated single-family zoning, and set the grounds for other zoning code changes. It is often seen as emblematic of contemporary zoning reform on a national level. This plan has set the stage to make three major changes in the city. First, up to triplexes would be permitted on prior single-family zoned districts. Second, density limits would be raised for apartment development surrounding transit stops and stations. Third, mandatory parking minimums would be removed from the code. This reform has been subject to serious challenges in court, but as of May 2024, it was irrevocably defended by a piece of legislation from the Minnesota State Legislature, which exempts local comprehensive plans from environmental lawsuits. |
| Minneapolis | Minnesota | MN | Municipal Ordinance | Approved | Plex Reform | Ordinance No. 2019-048 | Approved on 11/13/2019 | View Source | View Source | View Description The City of Minneapolis adopted the Minneapolis 2040 Plan, which prospectively eliminated single-family zoning, and set the grounds for other zoning code changes. This is one of the ordinances which followed up after the plan, to codify it. The ordinance is focused on Plex reform and made two main changes. The first is that it removed single and two-family codes from the zoning code and replaces it with the "Multiple Family District" code. The second is that it allowed for up to triplexes to be built on this expanded residential code, across the city. |
| Minneapolis | Minnesota | MN | Municipal Ordinance | Approved | Other Reform | Ordinance No. 2019-067 | Approved on 12/16/2019 | View Source | View Source | View Description The City of Minneapolis adopted the Minneapolis 2040 Plan, which prospectively eliminated single-family zoning, and set the grounds for other zoning code changes. This is one of the ordinances which followed up after the plan, to codify it. This ordinance focused on inclusionary zoning reform and made one central change: in order for a rental development with over 20-units to be approved, it must make a certain number of their units affordable. |
| Minneapolis | Minnesota | MN | Municipal Ordinance | Approved | Other Reform | Ordinance No. 2021-023 | Approved on 5/17/2021 | View Source | View Source | View Description The City of Minneapolis approved an ordinance to remove parking minimums throughout the city. Removing parking minimums is seen by some as being conducive to creating cities that are less car dependent; it is also seen as a policy lever which reduces wasted space, as well as the costs associated with a development, which may have impacts on the total number of units built, and their associated rental costs. |
| Missoula | Montana | MT | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 3669 | Approved on 10/19/2020 | View Source | View Source | View Description The City Council of Missoula approved an ADU ordinance, which mainly reduced regulations to their zoning code, which had already permitted ADUs in single-family zoned areas. This ordinance made three central changes. The first is that it removed the minimum parking requirement for the establishment of an ADU. The second is that it removed the owner-occupancy requirement for either constructing or renting out an ADU. The third is that it increased the maximum allowable height of ADUs. |
| Nashville | Tennessee | TN | Intensive Zoning Code Effort | Approved | Other Reform | Downtown Code | Adopted on 2/02/2010 | View Source | View Source | View Description The City of Nashville adopted their Downtown Code, which made three central changes. The first is that it implemented a form-based regulation, while removes use-based regulations, in order to expand mixed-use and diverse development types. The second is that it removed parking minimums. While these are two important changes, an important note is that these changes are limited to a very small geography within the entire jurisdiction, and therefore don't apply outside of the downtown area proscribed. |
| New Haven | Connecticut | CT | Municipal Ordinance | Approved | ADU Reform | Amendments to allow Accessory Dwelling Units in RM-1,RM-2,RS-1 and RS-2: and to reduce Minimum Lot size to 4000 SF | Passed on 10/4/2021 | View Source | View Source | View Description The Board of Alders of New Haven approved an ordinance which made it easier for homeowners in single-family areas to build attached ADUs. The ordinance itself is a part of the city's intention to phase in ADUs into single-family zoned areas, and the ordinance may be a stepping stone towards future legislation allowing detached ADU structures. To conclude, as of yet, the municipal code of the city merely allows ADU construction in the form of garages, attics, and basements, or other 'existing' structures, but not building detached ADUs from scratch. |
| New York | New York | NY | Intensive Zoning Code Effort | Approved | ADU Reform, Plex Reform, TOD Reform, Other Reform | City of Yes for Housing Opportunity | Approved on 12/05/2024 | View Source | View Source | View Description The New York City Council approved 'City of Yes for Housing Opportunity' which intends to make a series of zoning changes. There are eight central changes which the effort may include. First, it intends to implement a Universal Affordability Preference (UAP) which allows 20% more housing in medium- and high-density districts if units are income-restricted and affordable at 60% of the Area Median Income (AMI). Second, it permits ADUs in one- and two-family homes in all low-density districts, with restrictions in certain areas to address flooding and neighborhood context. Third, it expands non-residential conversions citywide, advances the eligibility date to 1991, and broadens residential conversion options. Fourth, it relegalizes buildings with two to four stories of housing above ground-floor retail, aligning with zoning, and adding much-needed homes. Fifth, it relegalizes modest, transit-oriented apartment buildings in low-density districts, restoring “missing middle” housing that fits neighborhood scale and character. Sixth, it significantly rolls back parking mandates, eliminating them in key transit zones, reducing them in the Outer Transit Zone, and easing exemptions elsewhere. Seventh, it simplifies adding contextual, height-limited buildings to campuses. Lastly, it lowers and standardizes the dwelling unit factor, enabling more studios, one-bedrooms, and housing with shared kitchens and common spaces. |
| Norwalk | Connecticut | CT | Intensive Zoning Code Effort | Approved | Other Reform | Norwalk Zoning Regulations Update | Effective on 2/19/2024 | View Source | View Source | View Description The Common Council of Norwalk passed and implemented a zoning code update that can primarily be known as a form-based code update (in commercial and multi-family regions). There were plans to make more significant changes to density in single-family zoned areas but this prospective set of reform was removed after communal pushback. It seems that the recommended set of updates largely included increasing the built capacity of certain single-family zoned areas to a two-family ceiling over time, and a recommendation for more parking spots per parcel in such zoned areas. While the passed and implemented intensive zoning code update lacked a substantial change to single-family districts, we may regard the form-based settlement as a minimal advancement in a city that hasn't considered an update of this kind in years. |
| Oakland | California | CA | General Plan Update | Approved | Plex Reform, Other Reform | 2023 - 2031 Adopted Housing Element | Approved on 2/17/2023 | View Source | View Source | View Description The City of Oakland adopted their 2023 - 2031 Housing Element, and it was subsequently approved by CA HCD following an initial request for revision from the department. This general plan update sets the intention and outline for three central changes to the city's zoning, land-use and housing policy. The first is that it identifies ways to work against single-family exclusive zoning through a missing middle housing approach. The second is that it identifies ways to build and maintain more affordable housing units across the city. The third is that it outlines tenant-supportive policy through an anti-displacement and racial justice framework. These intentions will need to be codified through ordinances in the future, and we might expect these codifications to occur within the near future. |
| Oakland | California | CA | Intensive Zoning Code Effort | Late Process | Plex Reform, Other Reform | Oakland 2045 General Plan | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City of Oakland is currently working on refining their 2045 General Plan. This general plan update is slated to make three central changes. The first is that it will implement missing middle housing updates that'll expand the formerly Two-Family district into a Two-to-Four Family district, and allow up to 4-units to be built in more areas across the city. The second is that it will create an affordable housing overlay zone and a housing site overly zone, both of which will expand ministerial approval and height/density incentives for developments that meet certain conditions. The third is that it will approach industrial rezoning through an environmental justice perspective, to reduce impacts on at-risk geographies and communities. According to the city, the public review period for these changes ended in May 2023; though it is unclear when exactly these changes may be adopted and then, further codified, by the city. |
| Parkersburg | West Virginia | WV | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 0-1712 | Passed on 8/23/2022 | View Source | View Source | View Description The City of Parkersburg adopted an ordinance allowing accessory dwelling units (ADUs) on property owners' primary property for all residential and business zoning districts within the City. The ordinance entails three main specifications: the first is that the ADU can be both attached to the main structure and also detached, the second is that the ADU must be smaller than the main structure, and the third is that while no additional off-street spots are required if the ADU requires the removal of an off-street spot then it must be replaced. |
| Pasco | Washington | WA | Municipal Ordinance | Approved | Plex Reform | Ordinance No. 4700A | Approved on 11/27/2023 | View Source | View Source | View Description The City of Pasco approved a zoning reform that implements and goes beyond the Washington state zoning reform HB 1110 (which allows fourplexes and sixplexes on certain single-family zoned lots in municipalities with populations of at least 75,000). The Pasco ordinance has two main features. First, it legalizes middle housing options (such as duplexes and triplexes) on many residential plots in the city. According to a city official, duplexes and townhomes were restricted on more than 85% of residential land in Pasco, and following a series of reforms, including this one, such middle housing types are now allowed on over 80% of residential land in the municipality. Second, the city has paired these use-type shifts with an associated shift in development standards, such as minimum lot sizes, site frontage and width requirements, and other related standards. |
| Philadelphia | Pennsylvania | PA | Municipal Ordinance | Approved | ADU Reform | Bill No. 190612 | Approved on 11/06/2019 | View Source | View Source | View Description The City Council of Philadelphia passed an ADU ordinance which made three central changes. The first allowed ADUs by-right in single-family zoned areas. The second specified that ADUs must be located interior to the principal building, or be made from an existent detached structure. The third is that it specified that the maximum size of the structure is not to exceed 800sqft. The major difference with this ordinance and the previous code, was that the previous code merely included a definition of ADUs, but not specifications concerning the approval process for them. |
| Phoenix | Arizona | AZ | Municipal Ordinance | Approved | ADU Reform | Ordinance No. G-7160 | Adopted on 09/06/2023 | View Source | View Source | View Description The City of Phoenix passed an accessory dwelling unit (ADU) reform which made three principal changes. First, it legalizes detached ADUs throughout all residential parcels in the city. Second, the ordinance prohibits the use of ADUs as short-term rentals. Third, it limits the number of ADUs per lot to 1. |
| Pittsburgh | Pennsylvania | PA | Intensive Zoning Code Effort | Early Process | ADU Reform | File No. 2022-0672 | Ongoing as of 2/28/2025 | View Source | View Source | View Description The Pittsburgh City Council is in an ongoing zoning code rewriting effort. The city passed an earlier resolution which required their Department of City Planning, as well as another agency, to report back on the ADU pilot program and the state of ADUs in the city. The city will now decide whether or not to codify or extend the permissibility of ADU construction beyond the narrow scope of its earlier two year-long ADU pilot overlay zone. As of now, the code is not very conducive to ADUs, and the specifities of the city's updates to the code, if they do in fact decide to update it, are unclear. It is important to note that although the 'Policy Name' field marks the concluded resolution, and that there has in fact been no complete codification of zoning change, and what was approved was merely a study and report back. |
| Portland | Oregon | OR | Intensive Zoning Code Effort | Approved | Plex Reform | Residential Infill Project 1 (RIP1) | Adopted on 8/12/2020 | View Source | View Source | View Description The City Council of Portland adopted Part 1 of their Residential Infill Project, which might primarily be seen as a missing middle housing measure. This zoning code rewrite lasted a few years and the city collected around 15,000 comments from the community throughout its first part. This reform made three central changes. First, it allowed for more housing types in single-family zoned areas (including duplexes, triplexes and fourplexes), while also limiting their size. Second, it created a Housing Opportunity Overlay Zone which modified the base zone regulations and allowances for lots within range of certain centers, corridors and transit routes. Third, it included a "deep affordability bonus" which allowed for a 6-unit residence to be built on a certain lot, if half of the units were made affordable to households earning 60% of the area median income (AMI). |
| Portland | Oregon | OR | Intensive Zoning Code Effort | Approved | ADU Reform, Plex Reform | Residential Infill Project 2 (RIP2) | Adopted on 6/01/2022 | View Source | View Source | View Description The City Council of Portland updated their Residential Infill Project, which had originally expanded missing middle housing options across most residential zones in the city, while also removing minimum parking requirements in many instances. Part 2 of the Residential Infill Project (RIP2) made at least three central changes. The first is that it allowed duplexes on all single-family zoned areas. The second is that it allowed up to fourplexes on an expanded segment of residentially zoned areas. The third is that it expanded attached houses and cottage clusters throughout an expanded segment of residentially zoned areas. |
| Princeton | New Jersey | NJ | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2020-16 | Adopted on 6/29/2020 | View Source | View Source | View Description The Princeton City Council adopted an ADU ordinance which made three central changes. The first is that it permitted ADUs throughout single-family zoned areas in the town. The second is that it specified that owner-occupancy is not required to establish an ADU. The third is that it allowed older and informal dwellings to be siloed into the ordinance, without necessarily needing to meet all of its regulatory standards. |
| Raleigh | North Carolina | NC | Municipal Ordinance | Approved | ADU Reform | Ordinance No. TC-16-19 | Adopted on 7/07/2020 | View Source | View Source | View Description The City and County of Raleigh led a string of zoning reforms in recent years, which have targeted missing middle housing; this is one of those ordinances. In this particular ordinance, which has been titled "Accessory Dwelling Units," the city made ADUs easier to construct through two changes. The first was removing a prior existing ADU overlay district (ADUOD), and the second was allowing ADUs on lots with existent attached or detached houses. |
| Raleigh | North Carolina | NC | Municipal Ordinance | Approved | Plex Reform | Ordinance No. TC-5-20 | Adopted on 6/06/2021 | View Source | View Source | View Description The City and County of Raleigh led a string of zoning reforms in recent years, which have targeted missing middle housing; this is one of those ordinances. This particular ordinance, which has been titled "Missing Middle Housing," made duplexes, townhouses and small apartment buildings easier to construct across the city and county. This intention was principally carried out in the ordinance through the expansion of the possible zoning districts wherein building missing middle housing types are permitted. |
| Raleigh | North Carolina | NC | Municipal Ordinance | Approved | Plex Reform, TOD Reform, Other Reform | Ordinance No. TC-20-21 | Adopted on 5/10/2022 | View Source | View Source | View Description The City and County of Raleigh led a string of zoning reforms in recent years, which have targeted missing middle housing; this is one of those ordinances. This particular ordinance, which has been titled "Missing Middle Housing 2.0," makes duplexes, townhouses and small apartment buildings easier to construct across the city and county. It follows up on the foundation of the former "Missing Middle Housing" ordinance in three main ways. The first is that it further expanded the possible zoning districts wherein building missing middle housing are permitted, the second is that it reduced the minimum lot size on residential districts, and the third is that it encouraged Transit Oriented Development (TOD) by slightly changing building standards in places defined as Frequent Transit Areas. |
| Raleigh | North Carolina | NC | Municipal Ordinance | Approved | Other Reform | Ordinance No. TC-11-21 | Adopted on 3/15/2022 | View Source | View Source | View Description The City of Raleigh adopted an ordinance that removed parking minimums from the zoning code and replaced them with parking maximums in certain contexts. An important note is that developers are conditionally allowed to exceed the maximums. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. |
| Rapid City | South Dakota | SD | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 6363 | Passed on 12/02/2019 | View Source | View Source | View Description The City of Rapid Falls passed an ADU ordinance which made three central changes. The first is that it allowed attached and detached ADU construction in single-family zoned area, as well as other zones, throughout the city. The second is that it implemented an owner occupancy requirement. The third is that it required parking for the associated ADU. |
| Reno | Nevada | NV | Municipal Ordinance | Early Process | ADU Reform | Granny Flat Ordinance' | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City Council of Reno is in the early stages of considering a change to their zoning code which would allow more ADUs across residential land in the municipality. The Council has asked for a draft ordinance which may be heard later in 2023, or further into the future. As this effort is in its early stages, it is unclear exactly how this reform will take shape. |
| Richfield | Minnesota | MN | Municipal Ordinance | Approved | Plex Reform, Other Reform | Ordinance Amendment Related to Low Density Residential District... | Adopted on 1/23/2023 | View Source | View Source | View Description The City of Richfield adopted an ordinance which amended its zoning code. This ordinance makes two central changes. The first is that it allows duplexes on land parcels prior devoted exclusively to single-family dwellings; it made this change by eliminating the Two Family Residential (MR-1) district and amending the Single Family Residential (R) district to incorporate the duplex use into it. The second change is that it reduces the minimum lot size of low-density parcels, effectively allowing for more housing to be built on what would've been prior empty space adjacent or surrounding a single-family configuration. Concerning the latter reform subset, reforms in developmental standards are often not given as much attention as reforms in land-use, but they are quite important as well. |
| Richmond | Indiana | IN | Intensive Zoning Code Effort | Approved | ADU Reform, Other Reform | Ordinance No. 22-2023 | Approved on 8/21/2023 | View Source | View Source | View Description The City of Richmond approved an intensive zoning code update which made a variety of changes. These changes range from permitting solar panels in residential areas, to increasing multi-family residential density for certain multi-family districts. Most centrally, they made accessory dwelling units (ADUs) a permitted use in single-family residential parcels in the city. |
| Richmond | Virginia | VA | Municipal Ordinance | Approved | ADU Reform, Other Reform | Ordinance No. 2023-101 | Adopted on 4/24/2023 | View Source | View Source | View Description The City of Richmond adopted an ADU and Other reform. This reform make two central changes. First, it allows both internal, attached and detached ADUs in single-family zoned areas. Second, it removes minimum parking standards from the zoning code; specifically, the ordinance strips the minimums for off-street parking as well as loading spaces, which were prior linked to set figures derived from the floor-area, underlying zoning district, or number of units within a development. |
| Roanoke | Virginia | VA | Municipal Ordinance | Approved | Plex Reform | Zoning Amendments | Enacted on 09/16/2024 | View Source | View Source | View Description The Roanoke City Council approved the latest zoning amendment, which aims to increase housing options and address issues of equity in the community. This amendment is similar to the amendment approved in March of the same year along with the city's comprehensive plan, City Plan 2040, but a lawsuit was filed over the approval of the March amendment, and the city conducted the adoption process again in September. This amendment aims to replace the restrictions on single-family zoning that undermine permanent segregation and housing equity and is expected to provide more affordable housing by allowing more multifamily housing than the amendment approved in March of the same year. In addition, the lot size requirements for each residential zone have been relaxed. |
| Rochester | Minnesota | MN | Intensive Zoning Code Effort | Approved | Plex Reform, Other Reform | Rochester Unified Development Code | Adopted on 9/07/2022 | View Source | View Source | View Description The City of Rochester adopted a new development code which made important changes, following more than 20-years of the city not having updated their zoning code. This reform made three central changes. The first is that it reduced the minimum lot size of many residential districts throughout the city. The second is that it allowed for mixed-use housing in prior commercial areas. The third is that it made setbacks and floor-area-ratio (FAR) regulations more amenable to missing middle housing development. |
| Sacramento | California | CA | General Plan Update | Approved | Plex Reform, TOD Reform | 2040 General Plan Update | Adopted on 2/27/2024 | View Source | View Source | View Description The City of Sacramento adopted 2040 General Plan Update. This general plan has provisions for instituting duplexes, fourplexes and other forms of missing middle housing, in all residential zoned land throughout the city. The plan also includes transit-oriented development policies and encourages housing construction near transit to reduce dependence on cars. |
| Saint Paul | Minnesota | MN | Municipal Ordinance | Approved | Plex Reform, Other Reform | Ordinance No. 22-1 (Phase 1 of the 1-4 Unit Housing Study) | Adopted on 1/19/2022 | View Source | View Source | View Description The City of Saint Paul passed an ordinance which updated their zoning code to be more conducive to ADU development, in line with the recommendations from their earlier 1-4 Unit Infill Housing Zoning Study. The city first allowed a narrow scope of the city to have ADUs in 2016, and then expanded ADUs to the entire city in 2018. This ordinance is an extension of those prior ordinances, and the current state of ADUs in the jurisdiction are as follows. First, ADUs are allowed on all single-family zoned districts throughout the city. Second, the owner occupancy requirement is no longer required for establishing an ADU. Third, a maximum of three ADUs can be built on lots containing one to two-family dwelling, so long as the maximum size is under 1,200sqft. |
| Saint Paul | Minnesota | MN | Municipal Ordinance | Approved | Plex Reform, ADU Reform | Ordinance No. 23-43 (Phase 2 of the 1-4 Unit Housing Study) | Adopted on 10/18/2023 | View Source | View Source | View Description The City of Saint Paul passed an ordinance which updated their zoning code and adopted the recommendations put forward in Phase 2 of the 1-4 Unit Housing Study. This zoning reform makes three central changes. First, it allows duplex to sixplex development throughout various residential districts; there are three districts with different maximums (RL-duplex, H1-fourplex, H2-fiveplex). Second, it instates an incentive in the H-1&2 series parcels that allows developers to build 1-2 additional units if those additional units meet certain affordability requirements (up to 80% AMI). Third, the reform allows up to 2-ADUs to be built on a single parcel for every single-family dwelling on such a parcel. While Phase 1 focused on ADUs, this law focused mainly on Plex reform and removing single-family textual predominance from the municipality. |
| Salt Lake City | Utah | UT | Intensive Zoning Code Effort | Approved | ADU Reform | Ordinance No. 17-23 | Adopted on 4/04/2023 | View Source | View Source | View Description The City Council of Salt Lake City adopted an accessory dwelling unit (ADU) ordinance. It appears that the ordinance makes three central changes: 1) it allows ADUs by-right in single-family zoned areas throughout the city, 2) it aligns the code's specifications of internal ADUs with state requirements, and 3) it "clarifies" other ADU regulations. It is unclear what form the clarifications are, and whether the law extends beyond the mandates of Utah state's HB 462, but it appears that the ordinance does represent a particular municipal reform which goes beyond the state mandate. Lastly, the ADU ordinance was passed with the purposes of creating new multi-family housing in low-residential districts, expanding housing choice and affordable housing, and supporting transit-oriented development. |
| Salt Lake City | Utah | UT | Intensive Zoning Code Effort | Approved | Plex Reform, Other Reform | Affordable Housing Incentives | Effective on 4/30/2024 | View Source | View Source | View Description The City Council of Salt Lake City approved the affordable housing incentive, which is linked to zoning reform. This reform is intended to encourage the construction of more affordable housing. In single-family and two-family zoning districts, the construction of small-scale multi-family housing, including two-family homes, triplexes and fourplexes, sideways and rowhomes, is permitted. In addition, the construction of duplexes or two-family homes is permitted in single-family districts where they were not allowed. In multi-family and mixed-use zoning districts, the following changes are included: permission for 1-3 stories extensions in many multi-family housing areas; removal of density requirements in residential multi-family (RMF) districts when affordable housing is provided; reduction of the time taken to approve housing projects; and permission for more diverse housing types in certain commercial areas (permission for row houses and sideways row houses under affordability requirements). |
| San Diego | California | CA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. O-21254 | Passed on 10/30/2020 | View Source | View Source | View Description The City of San Diego passed an ADU amendment which was seen as being one of the most progressive in the state of California. This ordinance made three central changes. First, it permitted attached and detached ADUs on single-family zoned lots. Second, it specified that both owner occupancy and minimum parking were not requirements for the establishment of an ADU. Third, a measure which made this ordinance distinct from many others, is that it instituted an affordable housing bonus program for ADUs. Concerning the bonus program, it allows an additional ADU to be permitted for every ADU that meets the low-income or moderate-income affordability bracket, effectively allowing multiple ADUs to be established on a single lot. |
| San Diego | California | CA | Intensive Zoning Code Effort | Approved | ADU Reform, Other Reform, TOD Reform | Homes for All of Us: Housing Action Package (Ordinance No. O-21439) | Passed on 3/11/2022 | View Source | View Source | View Description The City of San Diego passed their "Homes for All of Us" housing and zoning amendment package. This package is too large to summarize in brief, but we will focus on its three most significant domains. First, it set the stage for a minor future concession to the city's ADU Bonus program, whereby the deed-restriction for very low and low-income affordability was reduced from 15-years to 10-years. Albeit following this concession, the city's ADU ordinance is still likely the least restrictive and most progressive in the state. Second, the ordinance instituted seven new housing incentive programs, including at least one for transit-oriented development. Third, the ordinance specified that a property owner seeking to build an ADU can either go the route of the city's ordinance, or the route of the state law, or SB 9; but not both. |
| San Diego | California | CA | Intensive Zoning Code Effort | Approved | Other Reform | Homes for All of Us: Housing Action Package 2.0 Amendments | Passed on 09/21/2023 | View Source | View Source | View Description The City of San Diego adopted a zoning reform, which, though limited compared to its initial ambitious scope – made three central changes. First, it removes parking minimums from parcels that are within 1/2-mile to transit. Second, it allows for a 0.5 floor-area ratio (FAR) bonus for parcels with a commercial base use which are rezoned to multi-family uses. Third, it includes an incentive for off-site affordable housing development. Additionally, quite notable is that the package instituted a first right to purchase for tenants whose residencies are subject to condominium conversions. A prior version of this housing package included a provision which would have made the municipality the first in the state to implement California's SB 10, which allows single-family parcels near transit to accommodate up to 10-units. Sidestepping single-family zoning, this package made a concession to homeowner interests to focus generally on parking and development incentives. |
| San Francisco | California | CA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 311-18 | Passed on 12/11/2018 | View Source | View Source | View Description The City of San Francisco Board of Supervisors passed an ordinance that removed mandatory parking minimums from the zoning code. The city's reasoning behind the reform is that: A) a planning department study found that parking minimums add $20-50k more to the cost of an apartment, and B) that excessive parking incentivizes driving, leads to traffic and may form infrastructure which isn't suited for pedestrian safety. The jurisdiction joins a growing list of other jurisdictions who have removed parking minimums from a green-climate and housing perspective. |
| San Francisco | California | CA | Municipal Ordinance | Approved | Plex Reform | Ordinance No. 210-22 | Approved on 10/28/2022 | View Source | View Source | View Description The City of San Francisco Board of Supervisors passed an ordinance that allowed single family zoned areas to build fourplexes, and six-units on corner lots. A prior complication with this ordinance was that its earlier text, which removed single-family zoning in the city, may have had the effect of exempting the city from CA state's SB9 lot split and ADU law. Within the current legislative state of the city, a homeowner trying to expand their property can do so through the SB9 ministerial ADU process, or through the process outlined in this municipal ordinance. |
| San José | California | CA | Municipal Ordinance | Approved | ADU Reform | ADU Permit Program | Approved on 12/17/2019 | View Source | View Source | View Description The City of San José passed an ADU ordinance which made three central changes to its zoning code. First, it expanded where ADUs are allowed, now including two-family areas and any lot where a single-family residence is built. Second, it created a provision for allowing junior accessory dwelling units (JADUs) to be established, if they are attached or interior to the principal dwelling. Third, it increased clarity and reduced regulations regarding ADU dimensions, design standards, and parking. |
| San José | California | CA | Municipal Ordinance | Approved | Other Reform | Ordinance No. 30857 | Adopted on 12/06/2022 | View Source | View Source | View Description The City Council of San José adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance made three changes. The first is that it removed parking minimums throughout the entirety of the city. The second is that it implemented a Transportation Demand Management (TDM) requirement for each developmental project, whereby a developer is required to choose a set of measures to reduce vehicle miles travelled and to encourage green alternatives of transport. Third, the removal of parking minimums also coincides with the city affirming an intention of flexibility for land-uses allowed in particular buildings; they have also affirmed their intention of allowing for alternative developments in otherwise unused parking lots. |
| Seattle | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 123378 | Adopted on 8/23/2010 | View Source | View Source | View Description The City Council of Seattle adopted an ADU bill which permitted detached ADUs on single-family zoned areas. The prior ADU ordinance, which was passed in 1994, had allowed internal ADUs, but this ordinance is more significant due to the way in which it extended approval to external ADUs in the forms of converted garages, and fully constructed backyard cottages. This ordinance, while extending beyond the one established at the end of the 20th-Century, was still limited and presented many regulatory barriers that limited the feasibility of establishing ADUs throughout the city. |
| Seattle | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 125854 | Adopted on 7/09/2019 | View Source | View Source | View Description The City Council of Seattle adopted a significant ADU ordinance. This ordinance removed barriers for ADU construction in single-family zoned areas, and made three general changes. First, it allowed up to 2-ADUs on each lot in single-family zoned areas. Second, it reduced minimum lot sizes and increased the allowable height of ADUs. Third, it removed the owner occupancy requirement, as well as the parking minimums that were required earlier for ADU development. It is important to note, though, that attached ADUs were allowed in single-family zoned areas in Seattle in 1994, and that detached ADUs were allowed throughout the city in 2010, after a well functioning pilot program. This reform might be seen, then, as a means of fine tuning the jurisdiction's prior ordinances. |
| Somerville | Massachusetts | MA | Intensive Zoning Code Effort | Approved | ADU Reform, Other Reform | Ordinance No. 2019-25 | Passed on 12/12/2019 | View Source | View Source | View Description The City Council of Somerville passed an zoning code update, which was brought to the city by means of a "citizen petition." The ordinance fulfilled numerous directives of its Master Plan, but there are three central and important changes which it made. The first is that it increased the affordability requirements to 20% for many new developments in the city, which improved its prior inclusionary zoning policy. The second is that it permitted backyard cottages on most residentially zoned land. The third is that it implemented a form-based code throughout the entirety of the jurisdiction. |
| South Bend | Indiana | IN | Municipal Ordinance | Approved | Other Reform | Article 21-07: Access & Parking | Adopted on 9/17/2021 | View Source | View Source | View Description The Common Council of South Bend adopted an ordinance that removed mandatory parking minimums from the zoning code. The ordinance applies to both commercial and residential developments and follows an earlier city effort, in the year of the city-wide adoption, which saw the city remove parking minimums in the designated downtown of the jurisdiction. |
| South Burlington | Vermont | VT | Municipal Ordinance | Approved | Other Reform | ZA-22-07: Maximum Parking & TDM | Adopted on 1/09/2023 | View Source | View Source | View Description The City Council of South Burlington adopted an ordinance that removed parking minimums from the zoning code and replaced them with parking maximums. The jurisdiction joins a growing list of others who have removed parking minimums from a green-climate, walkability, and housing perspective. |
| South Portland | Maine | ME | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 4-22/23 | Passed on 11/01/2022 | View Source | View Source | View Description The City Council of South Portland passed an ordinance that permitted ADUs on all residential zoned land throughout the city. The ordinance made three changes. The first is that it removed the administrative barrier of a Planning Board public hearing which was prior required to gain approval. The second is that it removed the parking requirements prior associated with ADU construction or conversion. The third is that it specified that owner occupancy is required for establishing an ADU. |
| Spokane | Washington | WA | Municipal Ordinance | Approved | Plex Reform | Building Opportunities and Choices for All (Ordinance No. C36232) | Approved on 7/18/2022 | View Source | View Source | View Description The Building Opportunity and Choices for All pilot program is a one-year interim zoning program that modifies residential zoning to accelerate construction of more housing in neighborhoods, with more variety in the types of housing being provided. During the pilot program, Planning Services staff will be working with stakeholders and the broader community to create permanent code changes that make housing choice more of a reality for Spokane's residents. The pilot program would allow more housing options to be approved and built citywide within the next 12-18 months. Whether or not the city will come to codify this pilot program into a formal place within the zoning code is undetermined, and only the future will reveal the outcomes of this pilot. |
| Tacoma | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 28576 | Passed on 3/19/2019 | View Source | View Source | View Description The City Council of Tacoma passed a significant ADU ordinance. This ordinance made three central changes. First, it legalized detached ADUs on single-family zoned areas, whereas prior only attached ADUs were allowed. Second, it removed the prior established owner occupancy requirement. Third, it removed a previously required specific ADU permit from the approval process. |
| Tacoma | Washington | WA | Intensive Zoning Code Effort | Approved | Plex Reform, Other Reform | Home in Tacoma - Phase 2 | Effective on 02/01/2025 | View Source | View Source | View Description The City Council of Tacoma enacted the “Home in Tacoma Phase 2” ordinance, updating zoning and building regulations to aim at increasing housing density and creating more opportunities for homeownership. It replaces traditional single-family zoning with “low-scale” and “mid-scale” zones, allowing duplexes, triplexes, fourplexes, cottage housing, townhomes, small apartment buildings (in mid-scale areas), and accessory dwelling units (ADUs). By allowing more housing options in previously single-family zones, it aims to expand housing options and increase supply and affordability. It also introduces new zoning, design, and development standards to harmonize existing neighborhoods. |
| Tigard | Oregon | OR | Intensive Zoning Code Effort | Approved | ADU Reform | Code Amendments to the Tigard Development Code | Approved on 11/27/2018 | View Source | View Source | View Description The Tigard City Council approved a series of amendments to the Tigard Development Code, which made constructing missing middle housing easier; particularly ADUs. This ordinance can be summarized with three points. First, it specified that no additional parking is required for establishing an ADU. Second, it allowed 2 ADUs to be constructed on one single family lot, as long as one ADU is detached. Third, it set the maximum size for an ADU at 800sqft or less. |
| Tucson | Arizona | AZ | Intensive Zoning Code Effort | Approved | ADU Reform | Ordinance 11890 | Adopted on 12/07/2021 | View Source | View Source | View Description The City Council of Tucson adopted an ordinance to allow Accessory Dwelling Units (ADUs), or what they also refer to as casitas, in zones that allow residential uses. There are three main parts to this ordinance. The first is that one ADU is permitted per residential lot. The second is that there are height limits for an ADU of either 12ft, or the height of the primary structure. The last is that an ADU requires 1 additional off-street parking, but this can be waived for lots close to transit or cycling infrastructure. An important provision of this ordinance is that it will sunset in late 2026, unless extended by the city. |
| Tucson | Arizona | AZ | Municipal Ordinance | Approved | TOD Reform | Downtown Area Infill Incentive District (IID) (Ordinance No. 10710) | Adopted on 9/09/2009 | View Source | View Source | View Description The City of Tucson adopted their Downtown Area Infill Incentive District (IID) in 2009, and it has been updated somewhat regularly in subsequent years. In its first implementation, the downtown district had two main goals. The first was to facilitate infill development. The second was to establish a transit-oriented development (TOD) program for the downtown area of the city. We include this effort into our tracker because it was an early TOD overlay which has allowed for new housing and economic development in the jurisdiction, over time. |
| Tucson | Arizona | AZ | Municipal Ordinance | Approved | TOD Reform | Downtown Area Infill Incentive District (IID) | Approved on 12/20/2022 | View Source | View Source | View Description The City of Tucson adopted their Downtown Area Infill Incentive District (IID) in 2009, and it has been updated somewhat regularly in subsequent years. This update in 2022 was a major reformulation of the ordinance, which made several central changes. The first is that it allowed for residential development in industrial areas. The second is that it further incentivized affordable housing through its TOD provision. The third is that it extended the spatial coverage of the overlay. The fourth is that it removed the sunset provision of the ordinance, which would have otherwise removed the ordinance from the code if it wasn't extended by the city after a certain date. We include this effort into our tracker because it was an early TOD overlay which has allowed for new housing and economic development in the jurisdiction, over time. |
| Tukwila | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 2581 | Adopted on 7/02/2018 | View Source | View Source | View Description The City of Tukwila adopted an ADU ordinance which made three principal changes to its zoning code. First, it specified that both attached and detached ADUs are allowed on single-family zoned lots, with the condition that no more than one ADU is established per lot. Second, it required owner occupancy of either the ADU or the principal dwelling. Third, it required that there is one parking spot added for an ADU. Due to the owner occupancy requirement, as well as the parking requirement which isn't waived or tied to public transit, some may say that this ADU ordinance may be limited in its capacity to facilitate greater ADU development. |
| Tukwila | Washington | WA | Intensive Zoning Code Effort | Early Process | Plex Reform, TOD Reform, Other Reform | Codification of the Transit-Oriented Development Housing Strategies Plan | Ongoing as of 2/28/2025 | View Source | View Source | View Description The City of Tukwila is in the process of codifying updates to its zoning code, to align with recommendations published in its Transit-Oriented Development Housing Strategies Plan. There are three principal changes which the city is intending to make. First, it wants to create an affordable housing incentive program for developing multi-family units, otherwise known as an inclusionary zoning program. Second, it wants to reduce parking minimums by half, in order to reduce the costs associated with residential development. And third, it wants to make changes in its zoning code to allow for missing middle housing in its single-family zoned areas. |
| Walla Walla | Washington | WA | Municipal Ordinance | Approved | ADU Reform, Plex Reform | Ordinance No. 2018-53 | Adopted on 12/27/2018 | View Source | View Source | View Description The Walla Walla City Council passed a zoning reform ordinance, which made three central changes. First, it consolidated previously restrictive low-density residential districts into a common district called: "Neighborhood Residential" (NR). Second, it allowed construction of dense housing on NR districts, including cottage homes, duplexes, fourplexes, and tiny homes. Third, it made various changes to its ADU code: increasing maximum square footage, removing owner occupancy requirements, and making the application process "ministerial" as opposed to being subject to obstructions caused by public hearing provisions. |
| Washington | District of Columbia | DC | Municipal Ordinance | Approved | ADU Reform | Zoning Regulations Rewrite | Effective on 9/06/2016 | View Source | View Source | View Description The District of Columbia (DC) Council passed a zoning code update which permitted ADUs on many residential zoning districts. A caveat of the ordinance is that in order to rent an ADU unit, the owner needs to apply for and attain a Residential Rental Business License from the Department of Consumer and Regulatory Affairs. A limitation with this ordinance may be that it is administratively burdensome, which has limited the extent to which the ordinance has, in actuality, facilitated ADU construction across the district. |
| Yakima | Washington | WA | Municipal Ordinance | Approved | ADU Reform | Ordinance No. 6-2018 | Approved on 12/18/2018 | View Source | View Source | View Description The Yakima County government passed an ADU ordinance which made three central changes to the zoning code. First, it allowed both attached and detached ADUs on single-family zoned land, with the condition that no more than one ADU is established per lot. Second, it required one additional parking spot with the establishment of an ADU. Third, it required owner occupancy in order for an ADU to be approved. A limitation with this ordinance is that ADUs are subject to a public hearing process, which notifies neighbors close to a development that an application has been submitted. This is likely to reduce the effectiveness of this ordinance, and limit the extent to which ADUs may be realized in the jurisdiction. |
Showing 1 to 162 of 162 entries
Database Last Updated: February 28, 2025
If there are any questions associated with this work, or if you believe that we have missed significant or crucial reform efforts, then let us know through this Google Form, and we may add them to our database and webmap. Other inquiries can be directed to sgambhir@berkeley.edu.
We would like to thank Shiho Suzuki for the most recent update of the database.
- 1The current version of the Zoning Reform Tracker (with the database updated on February 28, 2025) focuses on municipal zoning reform efforts across the United States, and specifically records 162 reform efforts across 109 unique municipal jurisdictions. Concerning the question of timeline: our tracker data covers a span of 17 years, with the earliest zoning reform initiative we track occurring in 2007, and with the latest reform initiatives leading up to 2023. Here are the most important descriptive summary statistics from our tracker, in its current version: A) the predominant reform mechanism across the tracker is the municipal ordinance (n=109); B) the predominant reform phase across the tracker is approved reform (n=148); the predominant reform type represented in the tracker is accessory dwelling unit (ADU) reform (n=81). The top states most represented in our tracker, insofar as we record the number of approved or ongoing municipal reform initiatives within each state, are as follows: Washington (16); California (14); North Carolina (10); Minnesota (9); Massachusetts (7); Texas (7); and Virginia (7). The topmost counties with three or more reforms, insofar as we record the number of approved or ongoing municipal reform initiatives within each county, are as follows: King County, WA (7); Hennepin County, MN (6); Alameda County, CA (4); Anchorage County, AK (4); Kent County, MI (4); Middlesex County, MA (4); Salt Lake County, UT (4); Wake County, NC (4); Cook County, IL (3); Fulton County, GA (3); Pima County, AZ (3); San Diego, CA (3); Travis County, TX (3). These figures do not necessarily represent the quality of the reforms enacted therein, and their effectiveness. They are merely the tabulations derived from a spatial analysis of approved and ongoing reforms from our tracker. Moreover, the sometimes arbitrary nature of entry of particularly substantial and distinct reform efforts may work to remove the series of continual reforms which sometimes characterize reform efforts on the ground. We have sought to balance both particular representation with overrepresentation.
- 2 The design and framework of our tracker was greatly inspired by the National Low-Income Housing Coalition’s (NLIHC) tenant protections database, which has been incisive for tracking legislation, ordinances, court orders and other policy related to tenant protections in the United States, throughout the global pandemic. For more information on this resource, see: National Low Income Housing Coalition, “E.R.A.S.E. Project - Tenant Protections Resource” (Referenced on March 15, 2023), https://nlihc.org/tenant-protections
- 3 See Stephen Menendian, Samir Gambhir, and Chih-Wei Hsu, “Single-Family Zoning in Greater Los Angeles” (Berkeley, CA: Othering & Belonging Institute, March 2, 2022), https://belonging.berkeley.edu/single-family-zoning-greater-los-angeles; and particularly the section entitled “Single-Family Zoning and Economic Mobility (Opportunity),” and the following visualization: “Figure 8. Income by Parents’ Income Percentile By Percentage of Restricted Single Family Zoning.” While this analysis was not a kind of causal methodology, or even a multiple regression, which might be seen and valued in such fields as economics, policy analysis and sociology, this finding is still strongly suggestive of the link between single-family zoning and patterns of negative stratification. Namely, the largest implication of our analysis is that single-family zoning has been used as a racially restrictive governing tactic to limit opportunity for some, and to accumulate it with great returns, for others.
- 4 While OBI believes that zoning reform is an important route for altering, or at least for not preempting alteration, of the structural dispersion of resource and opportunity between communities, we believe that zoning reform should be part of a broader political program for economic justice, environmental justice and housing justice. Other means of tackling the housing crisis nexus should include: the decommodification of housing, the regulation of rents, the national codification of a renters’ right to counsel, the national codification of strong renters’ protections generally, the guarantee of safe and habitable housing for all, the direction of funding streams to facilitate the building of tenant power over political decision-making, and the institutional reconfiguration of eviction court to be more amenable to tenants’ rights and dignity.
- 5 We will list in this note some further references for the transformative housing policy levers mentioned above. For decommodified and social housing, see Karen Chapple, Jackelyn Hwang, Jae Sik Jeon, Iris Zhang, Julia Greenberg, and Bina P. Shrimali, “Housing Market Interventions and Residential Mobility in the San Francisco Bay Area,” Community Development Working Paper (Federal Reserve Bank of San Francisco, March, 2022), https://www.frbsf.org/community-development/publications/working-papers/2022/march/housing-market-interventions-and-residential-mobility-san-francisco-bay-area/ and separately, see Francesca Zepeda, Nicole Montojo and Leo Goldberg, “Community Land Trusts as Stewards of Public Land: A Guide for Local Governments in California” (Berkeley, CA: Othering & Belonging Institute, September 16, 2022), https://belonging.berkeley.edu/community-land-trusts-stewards-public-land; for the regulation of rent and the impacts of rental inflation and wage stagnance, see Homes Guarantee, “Federal Actions to Regulate Rents”, (2022), https://peoplesaction.org/wp-content/uploads/2022/08/Federal-Actions-to-Regulate-Rents_V3a.pdf; for right to counsel, or a codified renters’ right to legal representation in the case of tenancy-associated problems and eviction, see ACLU, NCCRC, “No Eviction Without Representation: Evictions’ Disproportionate Harms & the Promise of Right to Counsel” (American Civil Liberties Union, National Coalition for a Civil Right to Counsel, May 11, 2022), https://www.aclu.org/sites/default/files/field_document/no_eviction_without_representation_research_brief_0.pdf; for tenant protections, generally, see Aimee Inglis, “Tenant Protections Are a Cornerstone to Solving the Housing Crisis” (Shelterforce, February 13, 2017), https://shelterforce.org/2017/02/13/tenant-protections-are-a-cornerstone-to-solving-the-housing-crisis/; for healthy housing, which denotes housing that is habitable, safe, and free from mold, lead, and other environmental contaminants, see U.S. Department of Housing and Urban Development, “Healthy Homes for Healthy Families'' (n.d.), https://www.hud.gov/program_offices/healthy_homes/healthyhomes; for tenant power building, see TakeRoot Justice and RTCNYC, “Organizing is Different Now: How the Right to Counsel Strengthens the Tenant Movement in New York City” (TakeRoot Justice, The Right to Counsel NYC Coalition, March 2022), https://assets.nationbuilder.com/righttocounselnyc/pages/1334/attachments/original/1647562375/Organizing_is_Different_Now_FINAL.pdf?1647562375; for work which demonstrates the central role of juridical processes in eviction, and the import of resisting those processes by transforming the court’s role in instituting displacement, see KC Tenants, “Could We End Evictions?” (Hammer & Hope, No. 1, Winter 2023), https://hammerandhope.org/article/issue-1-article-3
- 6 Our statement concerning the unique nature of this project is certainly true for municipal zoning reform efforts, but the same cannot be said about the tracking of state housing reform efforts across the United States. In regard to this latter research, we would point the reader towards the extensive consolidation of state reforms carried out by the Terner Center, the Urban Institute and the Housing Crisis Research Collaborative. A brief note is that while the policy scope of the Terner Center et al.’s state reforms database is quite broad, and extends beyond zoning (e.g. covering the policy goals of general production, affordable housing, fair housing and smart-growth), the work contained in the Zoning Reform Tracker is both more focused specifically, for better or for worse, on single-family zoning reform and, in its first version, on reform efforts at the municipal level. The argument of the Terner Center et al.’s paper is that state reforms must be enacted to override housing policy stagnance, and the often exclusionary politics which are characteristic of housing policy at the local level (from Beverly Hills to Long Island – examples from California and New York, respectively). While we ultimately and strongly agree with this argument, we also believe that reform efforts that occur at the local or municipal level are often determinative, or at least, in some cases, precedent establishing, for future policy advances which have occurred at the state level. For the report, see Shazia Manji, Truman Braslaw, Chae Kim, Elizabeth Kneebone, Carolina Reid, and Yonah Freemark, “Incentivizing Housing Production: State Laws from Across the Country to Encourage or Require Municipal Action” (Terner Center for Housing Innovation, Urban Institute, Housing Crisis Research Collaborative, February 2023), https://ternercenter.berkeley.edu/wp-content/uploads/2023/02/State-Land-Use-Report-Final-1.pdf
- 7 We intend for the tracker to be a comprehensive hub for documenting zoning reform efforts across the United States, and we believe that it represents a significant contribution to our knowledge of zoning reform – at the same time, we must mention that in its first version there may be gaps in our recording of reform efforts across the United States, due to both the manifold number of municipalities across the country (around 30,000 in total), and also our reliance on media representations of local reforms efforts for our registration of them. An optimal infrastructure might look like creating a system which pulls zoning reform initiatives directly from municipalities’ legislative information systems if they meet our criteria for a zoning reform initiative; in this way we could regularly track both approved, ongoing and denied/rejected reforms in an evenly representative way, without a reliance on media publications, which, as of now, serve as the primary source which we use to point us in the direction of a possible reform effort. Even in the case that this system were to exist, it would likely still be non-representative: it is not the case that all jurisdictions in the country each host a legislative information system, and further have the quality of a system which would be adequate for the detail of our work. To conclude, it is ultimately the difference in digital access to previous ordinances and plan updates across municipalities, as well as the irregular media coverage across municipalities of different populations and sizes, which may affect the comprehensivity and representativeness of our tracker. This problem may be less prevalent at the level of the state, but it surely exists there as well. Because of this, we have decided on a hybrid independent-research-and-crowdsource model for the continual expansion of our tracker. Such a model will rely on both our independent tracking of reform efforts, as well as the local knowledge of users across their own communities (such local users might include general residents, housing policy researchers, and local planning department staff). We hope that with this model, we can cover missed ground and make our work as comprehensive and as representative as possible.
- 8We are planning on pushing updates to the tracker on a periodical basis.
- 9 We fully support and consent that the data in our tracker be used for research by housing policy researchers, research institutions, government agencies, PhD students, and other stakeholders. It is only right that a project that the public contributes to would commensurately allow for the free sharing, research and general use of its contents by the public itself; moreover, we greatly look forward to the research that may arise from the contents of the tracker. Our only condition for using our data is that you cite our project in your research (see the text below for a project citation). If there are any questions or need for more information, then feel free to contact us. Project Citation: Ipso Cantong, Stephen Menendian, and Samir Gambhir, “Zoning Reform Tracker” (Berkeley, CA: Othering & Belonging Institute, 2023), Database Last Updated: [MONTH DD, YYYY], https://belonging.berkeley.edu/zoning-reform-tracker
