The California Zoning Atlas is an ongoing project to produce zoning maps and analyses for every region and municipality in the state of California. The goals of this project are, firstly, to document with greater precision than before, and raise public awareness of, the extent of single-family-only and other restrictive zoning for each city and region in the state; secondly, to show how that zoning affects life outcomes of the residents of those cities; thirdly, to provide researchers, scholars, advocates and policymakers with freely and publicly accessible data and maps that they can use to study zoning; and fourthly, to motivate zoning and land use reforms at the local and state level. This project grew out of a multi-series study of racial residential segregation in the San Francisco Bay Area initiated several years ago. It later expanded to include the Greater Los Angeles and Sacramento regions. Below and in the navigation menu you'll find those reports along with related studies and analyses of zoning. The final product (to be launched in the Winter of 2023-2024) will be a statewide zoning atlas that will be compatible with and connect to the National Zoning Atlas project.

In the meantime, new reports and regional analyses will be posted here.

Single-Family Zoning in the San Francisco Bay Area

Bay Area Zoning map

Growing out of our series on racial segregation in the San Francisco Bay Area, this report provides an in depth analysis of the relationship between single-family zoning and racial residential segregation. In includes a repository of static zoning maps for every city in the nine-county region, plus an interactive zoning map. Click here to view this report.


Single-Family Zoning in Greater Los Angeles

Los Angeles zoning map

Similar to the Bay Area single-family zoning analysis above, this study of the six-county Greater Los Angeles region includes color-coded municipal maps displaying single-family zoning, other residential zoning, and non-residential zoning every municipality in the region. Check out the Los Angeles report here. We also released a supplemental report focused on the relationship between municipal budgets, revenue, expenditures and zoning in the region. See the supplemental report here.


Single-Family Zoning in the Sacramento Region

Sacramento zoning map

Greater Sacramento was the third region to be studied as part of our Zoning Atlas project, and similarly includes color-coded municipal maps. It also provides an in-depth analysis of the impacts of zoning on the region and suggests cities for zoning reform. See the Sacramento region study here.


Single-Family Zoning in the San Diego Region

In our fourth investigation as part of this series, we look at zoning in the 18 cities that comprise the San Diego region. Unlike the previous three studies, this report only provides a snapshot of the region rather than an in-depth analysis. The zoning makeup of the region was similar to that of the other regions. See the San Diego region study here.


Single-Family Zoning in the Monterey Region

Our fifth report in the series looks at the three-county Monterey region. Like the previous report, this study is brief, providing only a summary of the findings and identifying just two cities for reform. The findings of this study remained consistent with those of the previous report, in terms of the zoning makeup of the region. See the Monterey region study here.


Single-Family Zoning in the Fresno Region

This sixth regional report continues the past zoning research, this time focusing on Fresno county. Fresno county encompasses 15 incorporated municipalities and one unincorporated county area, and is home to about 1 million residents. It finds that single-family-only zoning is strikingly smaller (in proportional terms) of residential zoning in Fresno than in the previous California regions we have analyzed. See the Fresno region study here.