Bolthole Index county-legal census · checked 2026-10-07
10 of Montana's 56 counties — 18% — allow tiny homes as a dwelling. That is the 12th-largest count of any state. The strongest of them on the Bolthole Index is Pondera County (71/100). Every entry below cites the county’s own official source.
Rules change, and cities inside these counties set their own — treat this as a verified starting point, not legal advice. All 547 counties nationwide → Montana: no building codes → Montana: no zoning → Montana: no codes, no zoning → Montana: owner-builder → Montana: rv living → Montana: no minimum home size → Full Montana profile →
From the Montana guide
Montana RV occupancy has county-level answers in 12 counties: 4 allow it as a county land-use matter and 8 impose conditions; the remaining 44 are unanswered, not automatically allowed or prohibited.4 The allowed group is Fergus County, Musselshell County, Carter County, Petroleum County, with septic, floodplain and other applicable requirements still separate.4 Compare the Montana RV-living county list before choosing a parcel.4
Tiny-home occupancy has answers in 14 counties: 10 allowed as a county land-use matter, 4 limited and 42 unanswered.5 The highest-scoring allowed entries include Judith Basin County, Pondera County, Teton County, Fergus County, Musselshell County.5 The Montana tiny-home list links the county-specific conditions.5 Some limited RV answers concern rental spaces or RV parks, so ask the county planning office specifically about a personal RV on a private parcel.4 DNRC's state-trust-land camping rule applies to recreation on state trust land and does not answer private-land residency.19
From the Montana guide, written from the cited official sources and re-checked by an independent reviewer. This is research, not legal advice: confirm with the office before you buy or build.
10 of 56 Montana counties · sorted by Index score
Unincorporated Pondera County: no county rule sets this, because Pondera County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodplain, subdiv…
2024 Pondera County Growth Policy ↗Unincorporated Judith Basin County: no county rule sets this, because Judith Basin County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodpla…
Multi-Jurisdictional Hazard Mitigation Plan — Annex I: Judith Basin County ↗Tiny-home occupancy as a county land-use matter in unincorporated Teton County, Montana. Teton County's statement addresses county zoning only; floodplain permits, subdivision r…
Planner | Teton County Montana ↗Unincorporated Fergus County: no county rule sets this, because Fergus County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodplain, subdivis…
Central Montana Central Region Hazard Mitigation Plan, Annex F: Fergus County ↗County zoning restrictions on tiny-home occupancy in unincorporated Musselshell County. The county's no-zoning statement does not remove state, municipal, septic, subdivision, f…
About | Musselshell County ↗Unincorporated Treasure County: no county rule sets this, because Treasure County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodplain, subd…
Treasure County Growth Policy 2023 ↗Tiny-home occupancy under county land-use regulation in unincorporated Rosebud County areas outside the airport area-of-influence regulations; Colstrip and Forsyth municipal are…
Rosebud County Growth Policy ↗Tiny-home occupancy in unincorporated Carter County, as a county zoning matter. No county zoning restriction is established by the cited County policy. Airport-airspace obstruct…
Carter County Growth Policy Update (2024) ↗Tiny-home occupancy under county land-use zoning in unincorporated Fallon County. The county statement concerns zoning only; subdivision regulations, growth policy, airport affe…
Commission Minutes – June 27 – July 1, 2022 – Fallon County ↗Unincorporated Petroleum County: no county rule sets this, because Petroleum County's own reviewed answer confirms it has no county-wide zoning ordinance. Septic, floodplain, su…
Central Montana Central Region Hazard Mitigation Plan, Annex K: Petroleum County ↗Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the Montana state page for all 56 counties ranked, or go back to the national list.
Off-grid gear
Building on land in one of these Montana counties? The kit we'd start with:
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General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
