Vallejo, CA Accessory Structures: Shed & Carport Rules (2026)

02 covers detached accessory buildings and structures including sheds, gazebos, greenhouses, pergolas, garages, guest quarters, and storage shelters that are incidental to a main building on the same or an adjacent lot under common ownership. An accessory building may only be built on a lot that already has a legally permitted main building, though it can go up first and be used for up to one year during construction of that main building if a permit covers the whole project. Accessory buildings may not contain a kitchen or full bath unless approved as an accessory dwelling unit; a sink and toilet are allowed, but not a shower or tub enclosure, and unenclosed outdoor showers are permitted.

For structures up to fourteen feet tall, the building must sit on the rear half of the parcel and stay out of the required side setback, and be positioned at least five feet from the rear parcel line, or three feet if it sits more than fifty feet from the front property line. On a reversed corner lot, the accessory building cannot sit closer to the street-side lot line than the principal structure, and on a through lot it cannot project into the front setback or any required side setback.

202-A separately caps total accessory structure floor area at 1,000 square feet in the Residential Low Density district, and the RR district allows barns and stables to exceed the fourteen-foot height limit with director approval.