Shed permit rules in Twain Harte, CA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Twain Harte is an unincorporated CDP in Tuolumne County, so the Tuolumne County Ordinance Code (Title 17 Zoning) governs sheds. Tuolumne County adopts the 2022 California Residential Code; CRC R105.2 generally exempts one-story detached sheds 120 sq ft or less from a building permit, but zoning setbacks still apply.
Sheds in Twain Harte fall under unincorporated Tuolumne County jurisdiction. Title 17 of the Tuolumne County Ordinance Code regulates accessory structures including height, setbacks, and lot coverage by zone district; specific limits vary by the parcel's R district and should be confirmed with the Community Development Department. Tuolumne County has adopted the 2022 California Residential Code, and CRC Section R105.2 generally exempts a one-story detached accessory storage shed 120 square feet or less from a building permit. Even when a permit is exempt, zoning setbacks under Title 17 still apply, and any electrical, plumbing, or mechanical work needs a permit. Twain Harte sits within a CAL FIRE State Responsibility Area and a High Fire Hazard Severity Zone, so wildfire-related construction standards (CRC Chapter 7A) apply to qualifying structures. Confirm exact setbacks and FHSZ status with Tuolumne County Building Division at 209-533-5633.
A shed that ignores Title 17 setbacks or height limits, or work that triggers a permit but proceeds without one, can be cited by Tuolumne County Code Compliance and may require correction or removal under Title 17 enforcement.
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