Tiny home rules in Washoe County, NV — 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.
A manufactured or modular home built within 6 years of placement may serve as a detached ADU if permanently affixed and converted to real property. A shed or accessory structure cannot be a mobile/manufactured home.
Washoe County has no standalone tiny-home category; a tiny house is treated as an accessory dwelling or manufactured home. Under WCC 110.306.25(e), a manufactured or modular home constructed within six years of placement is permitted as a detached ADU if permanently affixed, its foundation masked, and it is converted to real property under Article 312 (Fabricated Housing) by final inspection. It must meet the same size and zone limits (Sec. 110.306.25(d) — up to 1,500 sq ft). A detached accessory structure (e.g. shed) may not be comprised of a mobile or manufactured home due to federal HUD standards (Sec. 110.306.10(i)). Reno and Sparks set their own tiny-home standards inside city limits.
Unpermitted tiny homes or RVs used as dwellings are code violations under Article 910; long-term RV occupancy is separately restricted under Article 310 temporary-use rules.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Washoe County's tiny homes rules stack up against other locations.
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