California bill AB 3173, introduced in February, would require some cities and counties to permit microunits in areas zoned for multifamily residences. The city or county must have a population of 400,000 or more to qualify for this requirement. Because of the way zoning laws operate, the bill would not apply on city land in a city with a population under 400,000 even if the county has a population over 400,000. The bill also establishes size and affordability requirements for the microunits.
Using 2019 population estimates for cities and the 2010 Census data for counties, the bill would apply in 8 cities and 21 counties. Eligible cities are Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, and Oakland. It’s possible that Bakersfield, with an estimated population of 384,145 last year, has now passed the 400,000 mark. Eligible counties are Los Angeles County, San Diego County, Orange County, Riverside County, San Bernardino County, Santa Clara County, Alameda County, Sacramento County, Contra Costa County, Fresno County, Kern County, San Francisco County, Ventura County, San Mateo County, San Joaquin County, Stanislaus County, Sonoma County, Tulare County, Solano County, Santa Barbara County, and Monterey County. It’s very likely that Placer County, with a population of 398,329 at the 2010 census, has now surpassed the requirement.