ADU rules in Tuolumne County, CA β also called accessory dwelling unit regulations or granny flat ordinances β cover setbacks, owner-occupancy, parking, and permit requirements.
Tuolumne County adopted an ADU ordinance (Title 17, Β§17.52.200) per California Government Code Β§65852.2. ADUs up to 800 sq ft are allowed on single-family lots. Detached ADUs have a 16-foot height limit and 4-foot side/rear setbacks. Pre-approved ADU plans are available.
Tuolumne County's ADU ordinance was adopted by the Board of Supervisors in 2020 and is codified at Β§17.52.200. The county follows state standards with a maximum floor area of 800 sq ft (minimum 150 sq ft) on single-family properties. Detached ADUs have a 16-foot height limit (25 feet if attached). Setbacks are 4 feet from rear and side property lines. Parking may not exceed one space per bedroom and is waived within 1/2 mile of transit. No impact fees for units under 750 sq ft. ADUs must be rented for terms longer than 30 days. The Building Division offers pre-approved ADU plans to streamline the permit process.
Cities cannot deny conforming ADU applications. Unpermitted ADU construction: standard building code enforcement.
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See how Tuolumne County's adu rules rules stack up against other locations.
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