City · California
ADU rules in Fairfield
2 sources
These are the primary sources for accessory dwelling unit regulations in Fairfield: the city's own zoning code, planning department pages, and permit guides. Start here before talking to anyone: the rules below are what your permit reviewer will apply.
ADU regulations
- fairfield.ca.govOfficial sourceVerified July 2026https://www.fairfield.ca.gov/government/city-departments/community-development/planning-division/zoning-development-standards/accessory-dwelling-units-adus
- codepublishing.comOfficial sourceReviewed July 2026Municipal Code §25.20.4.11https://www.codepublishing.com/CA/Fairfield/#!/Fairfield25/Fairfield2504.html#25.20.4.11Browse the full code library and look up §25.20.4.11
California statewide law also applies
California sets baseline ADU rights at the state level. Where local rules are stricter than state law allows, state law usually wins, so both are worth reading.
See California statewide rulesSpotted something outdated?
Zoning codes change. If a link is dead or Fairfield has updated its ordinance, report it and we'll verify against the official source.
Report a correctionReady to build?
Planning an ADU in Fairfield?
Tell us about your project and we'll match you with vetted local designers and builders as we bring them online. No cost, no obligation.