Accessory Structures in Twain Harte, CA (2026)
3 verified accessory structures rules for Twain Harte, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Twain Harte is unincorporated, so Tuolumne County Ordinance Code Chapter 17.36 governs accessory dwelling units, layered on California's statewide ADU preemption (Gov. Code §65852.2 and §65852.22). Single-family parcels may have one ADU plus a Junior ADU when owner-occupied. Detached ADUs may reach 16 feet in height; attached units may reach 25 feet. Side and rear setbacks are 4 feet, and ADUs under 750 sq ft are exempt from impact fees.
ADU Rules in Twain Harte (Tuolumne County)
Some RestrictionsShed Rules
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.
Twain Harte Shed Rules
Some RestrictionsGarage Conversions
Twain Harte is unincorporated Tuolumne County. A garage converted to habitable space requires a Tuolumne County building permit and Title 17 zoning compliance. Conversion to an Accessory Dwelling Unit follows California Government Code 65852.2: parking replacement is not required and the existing footprint is exempt from setback requirements.
Twain Harte Garage Conversion Rules
Some RestrictionsLooking for Tuolumne County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Twain Harte city rules.
Accessory Structures in Tuolumne County →