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Shed permit checklist — Contra Costa County, California
Assembled from Contra Costa County’s own published permit rules. Every line below is quoted from a city document and linked to it. Nothing here is generated, estimated, or inferred from another jurisdiction.
Do you need a permit?
Contra Costa County requires a permit for a shed.
One-story detached accessory structures stay exempt from a building permit up to a floor area of 120 square feet under the county's Construction Work Not Requiring a Building Permit handout; the handout cautions that Planning Division, sanitary district, or Contra Costa County Environmental Health approval may still apply depending on the structure's location, and that electrical, plumbing, and mechanical work takes its own permit.
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Sources
- shed — permit rules ↗verified August 2026
Other permits Contra Costa County publishes rules for
Listed because the city publishes a separate rule for each type — not because this project necessarily triggers one. Whether it does depends on your scope of work.
- Deck permit checklist
- Fence permit checklist
- Water heater permit checklist
- Re-roof permit checklist
- Retaining wall permit checklist
- Electrical work permit checklist
- General building work permit checklist
BuildSpec is a reference, not the authority having jurisdiction. Confirm requirements with Contra Costa County before you build.