Tiny home rules in Tustin, CA — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Tustin has no separate tiny-home ordinance. A permanent tiny house on a foundation is treated as an ADU under City Code Section 9279 (Ordinance No. 1517), with a 220-square-foot minimum and detached ADUs up to 850 or 1,200 square feet. Tiny homes on wheels are recreational vehicles and cannot be used as permanent dwellings.
Tustin does not have a dedicated tiny-home ordinance; the legal path for a tiny dwelling is through the city's Accessory Dwelling Unit rules in Tustin City Code Section 9279, adopted by Ordinance No. 1517 in December 2021 to match California state ADU law. A tiny home built on a permanent foundation and meeting building-code standards can be permitted as a detached ADU, which the city allows from a 220-square-foot minimum up to 850 square feet (studio or one bedroom) or 1,200 square feet (two or more bedrooms), generally at one story and about 16 feet in height with 4-foot rear and interior side setbacks. A movable tiny house on wheels is classified as a recreational vehicle or trailer under California law and is not permitted as a permanent residence; California also recognizes a 'movable tiny house' only when used as a state-law ADU meeting specific standards. As a permanent ADU, a tiny home must connect to utilities, satisfy building and fire codes, and, if located in Old Town's Cultural Resources District, obtain Design Review and a Certificate of Appropriateness. Because no Tustin-specific tiny-home section exists, applicants should rely on the ADU provisions and confirm details with the Tustin Community Development Department at (714) 573-3140.
Living in a tiny house on wheels as a permanent residence, placing an unpermitted tiny structure on a lot, or installing a tiny-home ADU without permits or required Cultural Resources District review can result in code-enforcement citations, removal orders, and abatement of an illegal dwelling.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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