Tiny Homes Zoning — State ProfileReviewed 2026-08-23
Can you put a tiny home in Missouri?
Current tiny-home-on-wheels and ADU rules for Missouri, sourced and dated — plus verified local builders.
GENERALLY ALLOWED
Missouri — Generally permissive, rural-heavy, with real named examples (verified 2026-08)
Tiny home on wheelsNo statewide tiny-home law; many rural Missouri counties (Lawrence and St. Clair among them) have no zoning ordinance and no building permit requirement at all outside their cities.
ADU / accessory unitKansas City has adopted IRC Appendix Q, giving foundation-built tiny homes a defined code path. Both Kansas City and St. Louis have developed tiny-home villages specifically for veterans and transitional/supportive housing — real, named precedents worth researching directly. Elsewhere, ADU rules are set city-by-city (Columbia, for example, allows ADUs in R-2 and higher zones, capped at 75% of the primary home or 800 sq ft, whichever is smaller).
Minimum square footageNone at state level; city limits vary
Foundation requirementDepends on county and unit type; Kansas City's Appendix Q adoption gives the clearest foundation-built path in the state
Local notesConfirm whether a parcel sits inside a city's extraterritorial or annexation zone before assuming unincorporated rules apply, and note that St. Louis County's own published guidance states THOWs are not permitted as permanent residences in unincorporated areas outside a designated mobile-home park.
!Zoning is set by your specific city or county, not the state as a whole. Use this as a starting point, then confirm with the local building or planning department before you buy land or start a build. Not legal advice.
Last reviewed 2026-08-23