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This fact brief was originally published as an experiment to test the concepts behind fact briefs.
Readers should be aware that while there is still a lot of useful information in fact briefs like this one, not all of them reflect Gigafact's current methods and standards for fact briefs. If you come across any that you feel are out of date, don't hesitate to contact us at support@gigafact.org.
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FACT BRIEF

Did California enact new limits on single-family zoning, overriding local controls?

By Lisa Freedland
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YES

On Sept. 16, 2021, California Governor Gavin Newson signed legislation limiting single-family zoning across the state. The law allows many homeowners to “build more than one housing unit on land that was previously designated for only one unit” under local zoning rules.

Housing affordability advocates hope the law will increase California’s notably tight housing supply. White House economists have cited its potential as a model policy response as housing prices continue to increase nationally. Another new state law fosters denser housing development near public transit lines.

One analysis of the single-family zoning bill noted a number of limitations, concluding it could “modestly accelerate” the construction of new housing units—adding a maximum 700,000 units of 2 million needed. 

Opponents are seeking to overturn the new laws with a ballot inititative in the 2022 election.

This fact brief is responsive to conversations such as this one.
Sources
California Legislative Information Senate Bill No. 9, Sept. 16, 2021
State of California Gov. Newsom signs legislation to boost California’s housing supply and fight the housing crisis
White House Alleviating supply constraints in the housing market
Terner Center (UC Berkeley) Will allowing duplexes and lot splits on parcels zoned for single-family create new homes?
San Francisco Chronicle California's new single-family zoning law probably won't produce much new housing in San Francisco
Los Angeles Times What just happened with single-family zoning in California?
Californians for Community Planning A ballot measure to stop Sacramento centralized zoning
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Gigafact
Between 2020 and 2022, under close editorial supervision, Gigafact contracted a group of freelance writers and editors to test the concepts for fact briefs and provide inputs to our software development process. We call this effort Gigafact Foundry. Over the course of these two years, Gigafact Foundry writers published over 1500 fact briefs in response to claims they found online. Their important work forms the basis of Gigafact formats and editorial guidelines, and is available to the public on Gigafact.org. Readers should be aware that while there is still a lot of relevant information to be found, not all fact briefs produced by Gigafact Foundry reflect Gigafact's current methods and standards for fact briefs. If you come across any that you feel are out of date and need to be looked at with fresh eyes, don't hesitate to contact us at support@gigafact.org.
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About fact briefs published on Gigafact
Fact briefs are short, credibly sourced summaries that offer “yes/no” answers in response to claims found online. They rely on publicly available, often primary source data and documents. Fact briefs are created by contributors to Gigafact —a nonprofit project looking to expand participation in fact-checking and protect the democratic process. See all fact briefs here.