California is the most ADU-friendly state in the nation, with sweeping legislation since 2017 that has removed most local barriers to ADU construction.
Rules by State
/ California
California ADU Rules
California is the most ADU-friendly state in the nation, with sweeping legislation since 2017 that has removed most local barriers to ADU construction.
ADU Friendliness Score
85
★ Favorable
Setbacks & Lot Coverage
Rear Setback
2 feet
Side Setback
11 feet
Owner Occupancy & Rental Rules
Owner Occupancy Required?
No
suspended through 2025. Likely extended.
Recent Legislative Changes
Recent Changes
AB 976 eliminated owner-occupancy requirement through 2025
AB Test