SB 9: DUO Developments and Urban Lot Splits

What is Senate Bill (SB) 9?

On January 1, 2022, Senate Bill 9 (the California Housing Opportunity and More Efficiency (HOME) Act) went into effect. The bill allows a housing development containing two residential units on one lot within the R1 (Single-Family Residential) zoning district without discretionary review or a public hearing, subject to certain criteria. SB 9 also allows a lot split to create two lots from one lot (AKA "urban lot split") in the R1 zoning district without discretionary review or a public hearing, subject to certain criteria. The provisions of SB 9 are applied in tandem with the City's existing Accessory Dwelling Unit (ADU/JADU) standards, resulting in the potential for up to four units on an eligible R1-zoned property.

Regulations and Information

On March 22, 2022, the City Council approved the SB 9 code amendments. The Council Staff Report, meeting video and materials are available online.

----------------------

For questions or comments, please contact the Planning Division by phone at (650) 903-6306 or by email.

Feedback