Accessory Structures in Fullerton, CA (2026)
5 verified accessory structures rules for Fullerton, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Fullerton permits ADUs and Junior ADUs (JADUs) in compliance with California Government Code Sections 65852.2 and 65852.22. One ADU and one JADU are allowed on any single-family lot. ADUs up to 800 square feet with a 4-foot rear and side setback are approved ministerially without discretionary review. No owner-occupancy requirement applies to ADUs (JADUs require owner occupancy). No parking is required if within half a mile of transit.
Fullerton ADU (Accessory Dwelling Unit) Rules
Few RestrictionsShed Rules
Fullerton regulates accessory structures through residential development standards in FMC Title 15. Small sheds under 120 square feet may be exempt from building permits but must comply with zoning setbacks. Larger structures require permits.
Fullerton Shed & Accessory Structure Rules
Some RestrictionsGarage Conversions
Fullerton permits garage conversions to ADUs under FMC Section 15.17.100. Conversions of legally established garages are exempt from setback requirements. No replacement parking is required for the primary dwelling when converting a garage.
Fullerton Garage Conversion Regulations
Some RestrictionsCarport Rules
Fullerton Municipal Code section 15.17.050 treats carports and patio covers as accessory structures. Non-enclosed covers attached or freestanding from a residence must sit at least 5 feet from any rear property line and 3 feet from any side line abutting a residential lot. A Building and Safety permit is required.
Carport Rules in Fullerton, CA
Some RestrictionsTiny Homes
Fullerton allows tiny houses only as a permanent ADU on a foundation under FMC 15.17.100, consistent with California Government Code 65852.2 and California Residential Code Appendix AX. Movable tiny houses on wheels (THOWs) registered as recreational vehicles cannot serve as a permanent dwelling on residential lots.
Tiny Home Rules in Fullerton, CA
Heavy RestrictionsLooking for Orange County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Fullerton city rules.
Accessory Structures in Orange County →