STATE LAWS
LAWS THAT GOVERN ADUs IN CALIFORNIA
Government Code Section 65852.150
- Among other things, allows ADUs in zones that allow single-family and multifamily uses provides additional rental housing and is an essential component in addressing California housing needs.
Effective January 1, 2021
- Laws that further reduced barriers, streamlined the approval process, and expanded capacity to accommodate the development of ADUs and JADUs.
AB 345: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202120220AB345
AB 3182: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB3182
AB 68: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB68
AB 881: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB881
SB 13: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200SB13
AB 587: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=201920200AB587
AB 670: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB670
AB 671: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB671
Effective January 1, 2022
SB 9: https://legiscan.com/CA/text/SB9/2021
- SB 9 allows homeowners to create up to four homes on an existing parcel, in effect, eliminating single-family-only zoning. Crucially, the law allows the owner to “split” their lot, which makes it easier to sell or finance additional homes on a single parcel.
Effective January 1, 2023
- Laws that made changes to the statewide regulatory standards that apply to ADUs including height allowances for two-story ADUs and clarification of building permit issuance processes.
SB 897: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202120220SB897
AB 2221: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202120220AB2221
AB 916: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202120220AB916
AB 157: https://leginfo.legislature.ca.gov/faces/billStatusClient.xhtml?bill_id=202120220AB157
AB 561: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=202120220AB561