Tiny Homes in Montana

Montana has become one of the most welcoming states in the country for tiny home and alternative housing, driven by a rare bipartisan coalition that pushed through sweeping zoning reform in 2023 and again in 2025. The state adopted IRC Appendix Q statewide in 2019 — one of the earliest in the nation — and the “Montana Miracle” reform package legalized ADUs on every single-family lot, defined tiny dwelling units in statute, and survived a unanimous state Supreme Court challenge.

Where to Place a Tiny Home in Montana

The Bozeman and Missoula areas have the most active tiny home markets in the state. Gallatin County has no minimum square footage requirements and allows tiny homes as primary dwellings and ADUs, provided structures meet building code. Missoula County is similarly accommodating for foundation-built tiny homes.

For THOW placement, long-term options are limited in cities. The Missoula KOA Holiday offers year-round extended-stay sites, and the Bozeman Campground offers long-term winter spots (October through May) at around $1,100 per month. Residence RV Park is a gated community offering full amenities and tiny home campsites.

For the most flexible placement, central and eastern Montana counties with limited zoning oversight allow private land placement with few restrictions. Land prices are significantly lower than western Montana, with rural acreage often available at $1,500–$5,000 per acre.

Montana Tiny Home Builders

Montana has a growing ecosystem of local builders. Woodland Ridge Tiny Home Crafters builds luxury custom tiny homes with over 30 builds completed, ranging from $90,000 to $200,000, and has been involved in local housing shortage initiatives. Tiny Homes Montana LLC, based in Columbia Falls in the Flathead Valley, builds custom THOWs and is developing a small THOW resort community.

Custom Tiny Homes of Montana builds 399 sq ft Park Model RV tiny homes built to RVIA standards, which can be titled and registered as park model RVs through the Montana MVD. Montana Custom Structures builds THOWs in-state. Trailside Structures offers prefab modular cabins and tiny homes working with Amish craftsmen.

Wind River Built, based in Wyoming, has a dedicated Montana resource page and builds THOWs and modular tiny homes with base models starting at $60,000–$80,000. Foothold, a Bozeman-based builder with an environmental focus, offers prefab models from 380 sq ft starting around $125,000.

Key Regulations to Know

Montana has no statewide minimum square footage for residential dwellings. Foundation tiny homes of 400 sq ft or less fall under IRC Appendix Q (adopted December 7, 2019), which requires minimum ceiling heights of 6’8” in living areas and 6’4” in bathrooms, loft areas of at least 35 sq ft with minimum 5-foot dimensions, and compliant egress openings.

HB 246 (2023) created a legal category for tiny dwelling units of 350–750 sq ft on permanent foundations, allowing municipalities to zone specifically for them. SB 528 (2023) mandated ADUs by right on single-family lots statewide starting January 1, 2024. SB 532 (2025) removed the prior 1,000 sq ft size cap and added a 15-day permitting timeline for parcels on public utilities.

THOWs have no permanent residency pathway at the state level. They are registered with the Montana Motor Vehicle Division as travel trailers or RVs. Montana’s registration advantages — no sales tax, no emissions testing, no inspections — make it popular for THOW registration. THOWs 11 years or older qualify for permanent (one-time) registration. For placement as a permanent residence, a THOW must typically be placed on a foundation and meet the local building code for a permanent tiny dwelling.