Accessory Structures in Concord, CA (2026)
3 verified accessory structures rules for Concord, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Concord must allow at least one ADU plus one Junior ADU per single-family residential lot under California Government Code §65852.2 (AB 68/881). ADUs up to 800 sq ft cannot be denied. Permits process within 60 days, 4-foot setbacks, no parking near transit, no impact fees under 750 sq ft.
Accessory Structures: Adu Permits
Few RestrictionsShed Rules
Sheds under 120 square feet and 12 feet tall do not require a building permit in Concord under California Residential Code R105.2. Sheds must still comply with zoning setbacks (typically 3 feet from rear/side property lines) and cannot contain plumbing or electrical without permits.
Accessory Structures: Sheds
Few RestrictionsGarage Conversions
Garages in Concord must remain available for vehicle parking under zoning code, and cannot be converted to living space without ADU or habitable-conversion permits. Detached garages follow accessory structure setbacks. Garage conversions to ADUs are streamlined under state law.
Accessory Structures: Garage Rules
Some RestrictionsLooking for Contra Costa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Concord city rules.
Accessory Structures in Contra Costa County →