Tiny home rules in Post Falls, ID — 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.
Idaho Code 39-4116 adopts the International Residential Code, including Appendix Q tiny home provisions, as the statewide minimum building standard. Local jurisdictions may not adopt residential code versions or amendments not approved by the Idaho Building Code Board.
Under Idaho Code 39-4116, the Idaho Building Code Board adopts the International Residential Code (IRC) including Appendix Q, defining a tiny home as a dwelling of 400 square feet or less excluding lofts. Idaho was the first state to adopt Appendix Q, establishing universal construction standards covering ceiling heights, loft access, egress windows, and emergency egress for tiny homes built on permanent foundations. Local jurisdictions may not adopt IRC sections or chapters that have not been approved by the state board, ensuring statewide consistency. Tiny homes on wheels are regulated separately as recreational vehicles or park model RVs through DOPL and federal HUD/ANSI standards.
Construction not meeting IRC Appendix Q standards may not receive a certificate of occupancy. Unpermitted tiny dwellings face stop-work orders and removal under code enforcement.
See how Post Falls's tiny homes rules stack up against other locations.
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