SB 9 (2025)
Removing Local Barriers to ADUs
SB 9 (2025) will ensure that local laws regarding the construction of accessory dwelling units (ADUs) are consistent with state law, and provides a pathway to nullify illegal, local barriers to ADUs.
State law requires local governments to submit their local ADU ordinances to the Department of Housing and Community Development (HCD) to ensure they are consistent with state law. If the local ordinance is not consistent with state law, HCD can require local governments to fix any disparities.
Under SB 9 (Arreguin), HCD will be authorized to void any local ADU ordinances that violate state law, and state ADU standards would apply until the local government passes remedial measures.
Updates
| Dec 2, 2024 | Introduced |
| Apr 22, 2025 | Passed Senate Housing Committee |
| May 7, 2025 | Passed Senate Local Government Committee |
| May 28, 2025 | Passed Senate Floor 27-4 |
| June 18, 2025 | Passed Assembly Housing Committee |
| July 16, 2025 | Passed Assembly Local Government Committee |
| Aug 28, 2025 | Passed Assembly Floor |
| Sept 3, 2025 | Passed Senate in a concurrence vote |
| Oct 10, 2025 | Signed Into Law by Gov. Newsom |
Authors
Jesse Arreguín (SD 7)
Sponsors
California YIMBY
Resources
SB 9 (2025) Fact Sheet
A closer look at the bill’s details.