Tiny home rules in Folsom, 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 in Folsom are regulated as ADUs or primary dwellings under state ADU law. Tiny Homes On Wheels (THOWs) are generally classified as recreational vehicles and cannot be used as permanent dwellings in residential zones. Movable Tiny Houses meeting ANSI 119.5 may qualify as ADUs under AB 68 amendments.
California treats 'tiny homes' differently based on construction type and mobility. Foundation-built tiny homes (under 400-800 sq ft) in Folsom qualify as ADUs or JADUs under Gov Code §65852.2 and must be permitted ministerially when meeting ADU standards. They must meet Title 24 energy, California Residential Code habitability, and fire/life safety requirements — 'tiny' size doesn't waive code compliance. Tiny Homes On Wheels (THOWs) built on trailers are typically classified as recreational vehicles or park model trailers under CA Health & Safety Code §18010 et seq. RVs cannot be occupied as permanent dwellings on residential lots in Folsom — max 30 days total per year and only with utility hookups prohibited. Mobile homes certified to HUD standards may be placed on permanent foundations in appropriate zones as primary dwellings or ADUs. AB 68 (2019) and subsequent updates created a 'Movable Tiny House' pathway: if certified to ANSI A119.5 RV code and permanently sited on a lot as an ADU with permanent utility connections and anchoring, some jurisdictions allow them — Folsom's ordinance should be checked for specific acceptance. Folsom does not have a designated tiny home village or park community at this time.
THOW used as permanent residence on residential lot: zoning violation, occupancy order potentially issued. Unpermitted foundation-built tiny home: stop work, bring to code as ADU or remove. Health & safety violations (no sewage, no egress): immediate abatement.
Folsom, CA
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Side-by-side rule comparisons with other cities in Sacramento County.
See how other cities in Sacramento County handle tiny homes.
See how Folsom's tiny homes rules stack up against other locations.
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