AB 956
Double Detached ADUs
AB 956 will increase the housing potential of single-family lots by empowering homeowners to build up to two detached ADUs (accessory dwelling units) on their properties.
Currently, a single-family homeowner is limited to building only one detached ADU – that is, an ADU that doesn’t share any walls with the primary home – even if they have ample space for a second ADU on their property. This restriction is inconsistent with other ADU policies that allow homeowners to have two ADUs if one of the units is “attached,” or built in the garage, basement, or another part of the existing home.
AB 956 removes this restriction while maintaining safety rules. It allows homeowners to construct up to two detached ADUs on their property when the physical space is available.
Updates
AB 956 passed out of the Assembly in May 2025. It passed the Senate Housing Committee on June 10, 2026, and will receive further consideration in the State Senate.
Authors
- Sharon Quirk-Silva (AD 65)
Sponsor
- California YIMBY