California HOME Act

California HOME Act
California State Legislature
Full name	California Housing Opportunity and More Efficiency Act
Introduced	December 7, 2020
Assembly voted	August 26, 2021
Senate voted	August 30, 2021
Signed into law	September 16, 2021
Sponsor(s)	Sens. Toni Atkins, Anna Caballero, Susan Rubio, Scott Wiener, Dave Cortese, Lena Gonzalez, Mike McGuire; Assems. Robert A. Rivas, Buffy Wicks
Governor	Gavin Newsom
Code	Government Code
Section	66452.6, 66411.7, 65852.21
Resolution	SB 9
Website	https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202120220SB9
Status: Current legislation

2021 California Senate Bill 9 (SB 9),^[1] titled the California Housing Opportunity and More Efficiency (HOME) Act, is a 2021 California state law which creates a legal process by which owners of certain single-family homes may either build two 800-square-foot homes or one duplex on their property, to result in a maximum of four housing units on a formerly single-family lot, and prohibits cities and counties from directly interfering with those who wish to build such homes.

The bill was crafted to reduce the cost of housing in California by increasing housing supply and density within California cities and overriding municipal and county zoning laws requiring single-family zoning. The law also expands the capacity for secondary suites (also known in California as Accessory Dwelling Units - ADU's).