Accessory Structures in Santa Monica, CA (2026)
5 verified accessory structures rules for Santa Monica, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Santa Monica regulates ADUs under SMMC §9.31.025. Maximum size is 650 sq ft on lots up to 6,000 sq ft or 800 sq ft on larger lots. No development fees. Ministerial approval process.
Santa Monica ADU (Accessory Dwelling Unit) Rules
Some RestrictionsShed Rules
Santa Monica regulates accessory buildings under SMMC §9.21.020. Sheds and similar structures in residential zones must comply with setback and height requirements. Sheds may not contain a kitchen unless approved as an ADU.
Santa Monica Accessory Building & Shed Rules
Some RestrictionsGarage Conversions
Santa Monica allows garage conversions to ADUs under SMMC §9.31.025. Replaced parking spaces do not need to be provided. Conversions of existing structures are exempt from setback requirements.
Santa Monica Garage Conversion Rules
Some RestrictionsCarport Rules
Carports in Santa Monica are regulated as accessory structures under the zoning ordinance. Building permits are required. In R1 districts, accessory buildings have specific setback and height requirements distinct from the primary dwelling.
Santa Monica Carport Construction Rules
Some RestrictionsTiny Homes
Tiny homes on foundations in Santa Monica are regulated as ADUs under CA Gov Code §65852.2 and the local zoning code. Tiny homes on wheels are not permitted as permanent dwellings. The city must allow ADUs per state law.
Santa Monica Tiny Home & Small Dwelling Rules
Some RestrictionsLooking for Los Angeles County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Santa Monica city rules.
Accessory Structures in Los Angeles County →