Tiny home rules in Hamilton County, IN — 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-home rules come from your Hamilton County city, not the county. Carmel's UDO requires every single-family dwelling to be at least 23 feet wide, and Indiana treats a tiny house on wheels as a recreational vehicle that cannot be lived in.
There is no countywide tiny-home ordinance; dwelling standards are set by each city's Unified Development Ordinance under IC 36-7-4. A site-built tiny house on a permanent foundation is regulated as a single-family dwelling and must meet the Indiana Residential Code and local minimum-size rules. Carmel's UDO (Section 5.04) requires all single-family or duplex dwellings to be built at least 23 feet wide, which effectively bars very narrow tiny houses in most districts. A tiny house on wheels is treated as a recreational vehicle; Carmel's RV standards (Section 5.34) prohibit occupying or using a parked or stored vehicle for habitation, so full-time living in a THOW on a residential lot is not allowed. Confirm eligibility with your city before buying.
Placing a tiny home that is not a permitted use, or living in a tiny house on wheels on a residential lot, is a city code-enforcement matter, addressed through orders to cease occupancy, remove, or legalize. The county does not
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Hamilton County's tiny homes rules stack up against other locations.
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