Bolthole Index county-legal census · checked 2026-08-08
19 of Montana's 56 counties — 34% — require no residential building permit and have no county-wide zoning in their unincorporated areas. That is the 9th-largest count of any state. The strongest of them on the Bolthole Index is Lincoln County (77/100). 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 623 counties nationwide → Montana: no building codes → Montana: no zoning → Full Montana profile →
19 of 56 Montana counties · sorted by Index score
Single-family residences are exempt from the state building permit by law, and Lincoln County has no certified county building code program (only the City of Libby is certified,…
Montana DLI - Certified City, County and Town Programs ↗Broadwater County is not a certified local building-code jurisdiction on the Montana DLI list, so unincorporated areas fall under the State Building Codes Bureau, which does not…
Montana DLI Certified City, County and Town Programs ↗Mineral County has no certified local building code program, so it falls under state jurisdiction where single-family residential construction is not subject to building-permit …
Montana DLI - Certified City, County and Town Programs ↗Glacier County is not on the Montana DLI list of certified local building-code jurisdictions, so it falls under the state Building Codes Bureau, which does not require permits f…
Montana DLI - Certified City, County and Town Building Code Programs ↗CORRECTED 2026-07-08: Pondera County's certified building program covers COMMERCIAL only (MT DLI certified-government list); under MCA 50-60-102 the state code does not apply to…
MT DLI — Certified governments ↗Montana's state Building Codes Program exempts "residential buildings containing less than five dwelling units" and only requires permits within a certified local government pro…
Montana DLI - Building Permits ↗Montana exempts single-family dwellings from state building permits outside certified local jurisdictions, and Teton County has not adopted a local building-code ordinance (its …
Montana DLI Building Codes Program - Building Permit FAQ ↗Montana does not enforce a statewide residential building code in rural counties unless locally adopted; Treasure County maintains only a Growth Policy (advisory under MT law) a…
Treasure County, MT - Planning ↗Toole County has no local building-code enforcement program; under Montana's framework rural counties do not require residential building permits unless a local code is adopted,…
Toole County - Environmental Health and Sanitarian ↗No county building permit program is offered; the Planning Board handles only subdivision plats and certificates of survey, consistent with Montana having no statewide residenti…
Powder River County Planning Board ↗Most of Dawson County is unzoned and a Zoning Compliance Permit is only needed for construction within the two citizen-driven zoned districts (Highland Park, Forest Park); singl…
Dawson County Planning - Zoning ↗The County Planner page states "Building and electrical permits are not required through Rosebud County, but may be required by the State of Montana."
Rosebud County - County Planner ↗Montana has no statewide residential building code enforcement in rural counties unless locally adopted, and Carter County's official site lists no building/inspection departmen…
Carter County, MT official website (Departments) ↗"Valley County does not issue countywide building permits." A state building permit is required only for non-exempt buildings, and "residential buildings containing less than fi…
Valley County Planning - Permits (PDF) ↗Montana does not enforce a statewide residential building code in rural counties unless locally adopted; Sheridan County's only land-use instrument is a Growth Policy that the c…
Sheridan County, MT - Planning ↗Montana does not enforce a residential building code in unincorporated rural counties unless locally adopted; Fallon County has no county building-permit department (Planning ha…
Fallon County MT - Planning Department ↗Montana enforces no statewide residential building code in rural unincorporated areas unless locally adopted; McCone County's site lists a Land Planning department but no buildi…
McCone County (official site) ↗Prairie County has no local building department or code-enforcement program; Montana does not require residential building permits in unincorporated rural counties that have not…
Montana Department of Labor & Industry - Building Codes Program ↗Montana exempts single-family residential buildings (fewer than five dwelling units) from the state building permit in areas outside certified jurisdictions, and Petroleum Count…
Montana Building Codes Bureau - State Building Permit ↗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.
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.
