Tiny home rules in Mountain View, 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.
Tiny homes on foundations are regulated as ADUs in Mountain View. Movable tiny houses on wheels may be allowed as ADUs if they meet state movable tiny house standards.
Mountain View follows California HCD guidance and Government Code 65852.2. A tiny home on a permanent foundation is treated as an ADU or JADU and must comply with ADU rules including minimum efficiency unit size of 150 square feet, setbacks, and Title 24 energy standards. A Movable Tiny House, defined by HCD Information Bulletin 2020-01, may be permitted as an ADU if it is built to ANSI A119.5 or NFPA 1192 standards, has vehicle registration with the DMV, and meets utility hookup, anchoring, and setback requirements in the city ADU ordinance. A recreational vehicle or travel trailer parked in a yard is not a dwelling unit and cannot be occupied as a residence under Mountain View code. Any tiny home used as a dwelling must have permanent water, sewer, and electrical connections.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Santa Clara County.
See how other cities in Santa Clara County handle tiny homes.
See how Mountain View's tiny homes rules stack up against other locations.
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