Tiny home rules in Boise, 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.
Boise recognizes tiny homes on foundations as ADUs under Idaho Code Section 67-6511A, typically capped at 900 sq ft. Tiny homes on wheels (RVs) are not permitted as permanent dwellings except in licensed RV parks.
Tiny homes built on permanent foundations are regulated as dwellings or ADUs under the Idaho Residential Code and Appendix Q (tiny houses under 400 sq ft). Boise issues building permits and treats them as small single-family homes or ADUs depending on lot configuration. Tiny homes on wheels are classified as park model RVs or travel trailers and may only be occupied permanently inside licensed RV parks or manufactured home parks; they cannot serve as a primary dwelling on a standard residential lot. A THOW may be temporarily occupied by one vehicle on a residential lot for up to 30 days per Idaho zoning norms. Construction must meet IRC ladder/egress rules for sleeping lofts.
Contact your local code enforcement office for specific penalty information.
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See how Boise's tiny homes rules stack up against other locations.
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