San Joaquin County, CA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in San Joaquin County, CA, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Exempt size
- ≤120 sq ft
- Exempt height
- ≤12 feet
- Roof overhang limit
- ≤24 inches
- Electrical/plumbing
- Still needs separate permits
Summary
Detached storage sheds, playhouses and similar accessory structures under 120 square feet and 12 feet tall don't need a building permit in the unincorporated county.
One-story detached accessory structures used as tool and storage sheds, playhouses and similar residential uses, and one-story detached agricultural buildings provided the gross floor area does not exceed 120 square feet (11.15 m 2), the height does not exceed 12 feet (3.69 m), and the maximum roof projection does not exceed 24 inches (610 mm). Exemption from a building permit does not include electrical, plumbing or mechanical installation and does not authorize any work to be done in violation of laws or ordinances including but not limited to planning, zoning and setback requirements.
2. Fences not over 7 feet (1829 mm) high.
3. Oil derricks.
4. Retaining walls that are not over 4 feet (1219 mm) in height measured from the bottom of the footing to the top of the wall, unless supporting a surcharge or impounding Class I, II or IIIA liquids.
5. Water tanks supported directly on grade if the capacity does not exceed 5,000 gallons (18 925 L) and the ratio of height to diameter or width does not exceed 2:1.
6. Sidewalks and driveways not more than 30 inches (762 mm) above adjacent grade, and not over any basement or story below and are not part of an accessible route.
7. Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work.
8. Temporary motion picture, television and theater stage sets and scenery.
9. Prefabricated swimming pools that are accessory to a Group R-3 occupancy that are
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Development Title: Supplement 3 | Code of Ordinances: Supplement 80 Update 2).
Full Breakdown
Section 8-1004, amending CBC Section 105.2 item 1, exempts one-story detached accessory structures used as tool and storage sheds, playhouses and similar residential uses, plus one-story detached agricultural buildings, from a building permit if gross floor area does not exceed 120 square feet, height does not exceed 12 feet, and roof projection does not exceed 24 inches. The exemption never covers electrical, plumbing or mechanical work, or zoning and setback compliance.
Violations & Fines
Building without a required permit can trigger a recorded code violation, an investigation fee equal to the permit fee, and civil penalties up to $2,500 per violation.
Frequently Asked Questions
Can I build a 150-square-foot shed without a permit?
Does the shed exemption cover running power to it?
Sources & Official References
Other rules in San Joaquin County
How San Joaquin County compares: Shed Permit Requirements by City·California rules heatmap·Compare San Joaquin County to another location·View the California accessory structures overview
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