Butte County, CA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Butte 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
- Permit-exempt size
- Up to 120 sq ft floor area, one-story, detached, no utilities
- Code authority
- Butte County Code section 26-3.1 / CBC section 105.2; setbacks under section 24-156
- Utility caveat
- Any electrical, gas, or plumbing serving the shed requires a permit
- Rear setback (sheds <=15 ft tall)
- 5 feet from rear property line
- Foundation-less small sheds
- No required setbacks from property lines
Summary
One-story detached sheds under 120 sq ft do not require a Butte County building permit, but they must meet zoning setbacks; any electrical, plumbing, or gas utilities serving the shed do require permits.
WORK EXEMPT FROM BUILDING PERMITS. Butte County Code, Section 26-3.1 and California Building Code Section 105.2. Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of current code or any other laws or ordinances of this jurisdiction. Building permits shall not be required for the following: Building: 1. One-story detached accessory structures used as tool and storage sheds, playhouses and similar uses, provided that the floor area does not exceed 120 square feet. Any utilities serving such structure, requires a permit. Structure still needs to meet zoning setbacks. 2. Fences, other than swimming pool barriers, and other than those built of masonry material, not over 7 feet high. Masonry fences not over 6 feet (1829 mm) high. Fences still need to meet zoning requirements. 4. Retaining walls that are not over 4 feet 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 and the ratio of height to diameter or width does not exceed 2:1. 10. Shade cloth structures constructed for nursery or agricultural purposes, not including service systems. 14. Decks in an R-3 occupancy, not exceeding 200 square feet in area, not more than 30 inches above grade at any point, are not attached to a dwelling and do not serve an exit door.
Full Breakdown
2 with local amendments, exempts certain small accessory structures from building permits. Specifically, Form DBP-20 published by the Butte County Department of Development Services lists 'one-story detached accessory structures used as tool and storage sheds, playhouses and similar uses' as exempt from building permits provided the floor area does not exceed 120 square feet. Even though no building permit is needed, the structure must still meet zoning setbacks established by the underlying zone, and any utilities (electrical, gas, plumbing) serving the shed require their own permits.
Sheds larger than 120 sq ft are treated as 'accessory structures' regulated by Section 24-156 of the zoning code and must meet that section's setback rules: side and front-yard setbacks the same as the primary structure, and a five-foot rear setback for structures 15 feet or less in height (matching the primary structure's rear setback if taller). There are no required setbacks for small sheds, playground equipment, well houses, and similar small accessory objects 'not attached to a permanent foundation,' per Section 24-156. Agricultural shade-cloth structures, water tanks under 5,000 gallons, and retaining walls under 4 feet are also exempt from permits.
Violations & Fines
Installing a shed in violation of zoning setbacks, or installing electrical/plumbing/gas service to a shed without permits, can result in code enforcement notices, mandatory removal or relocation of the structure, and permit reinspection fees. Stop-work orders may issue for unpermitted utility installations.
Frequently Asked Questions
Do I need a permit for a backyard shed in unincorporated Butte County?
How close to my property line can I put a shed?
Can I run an extension cord to a shed?
Sources & Official References
Other rules in Butte County
How Butte County compares: Shed Permit Requirements by City·California rules heatmap·Compare Butte County to another location·View the California accessory structures overview
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