Fairfield, CA Accessory Structures: ADU Owner Occupancy (2026)

G requires owner occupancy of a residential property for any property with a junior accessory dwelling unit (JADU), meaning a unit no larger than 500 square feet built entirely within the walls of an existing or proposed single-family home. The property owner may satisfy the requirement by living in the remaining primary residence or by living in the newly created JADU itself; either arrangement complies. The requirement doesn't apply to property owned by a government agency, land trust, or housing organization, an exception that tracks similar carve-outs in state ADU law for affordable-housing providers.

22 and the Fairfield Municipal Code, and a copy must be filed with the Planning Division. Because the restriction runs with the land rather than the individual owner, a buyer of a property with an existing JADU takes on the same owner-occupancy obligation. By contrast, standalone detached ADUs built without a JADU on the same lot carry no owner-occupancy condition under this section, since the requirement in subsection G is triggered specifically by adding a JADU.