Bolthole Index county-legal census · checked 2026-08-08
39 of Montana's 56 counties — 70% — do not require a residential building permit in their unincorporated areas. That is the 7th-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 736 counties nationwide → Montana: no zoning → Montana: no codes, no zoning → Full Montana profile →
39 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 ↗Under Montana law, single-family/residential buildings of fewer than five dwelling units in unincorporated areas are exempt from the state building permit; Lewis and Clark Count…
Montana DLI Building Codes - Is a State Building Permit Needed? ↗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 ↗Meagher County has no certified local building program (falls under State Building Codes Bureau), and Montana exempts single-family residences from state building permits outsid…
Montana DLI Building Codes Program - Building Permit FAQ ↗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 ↗Beaverhead County is not on Montana's certified local building-code list, so unincorporated single-family/duplex construction falls to the State Building Codes Bureau, which doe…
Montana DLI Certified City, County and Town Programs ↗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 ↗Unincorporated Park County is not a certified building-code jurisdiction (only the City of Livingston is certified), and Montana exempts residential buildings of fewer than five…
Montana DLI Building Codes Bureau - Certified Government Programs ↗Fergus County has no certified county building-code program (only the City of Lewistown is certified); all other areas fall under the State Building Codes Bureau, and Montana la…
Montana DLI Certified City, County and Town Programs ↗Under Montana law no building permit is required for a single-family residence unless a local jurisdiction adopts one; Ravalli County's Planning Department issues zoning/land-us…
Montana DLI Building Codes - Building Permit FAQ ↗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 ↗Flathead County has no building department and does not regulate building codes; building permits are administered by the Montana Department of Labor & Industry, not the county.
Flathead County - Building Information ↗Under Montana law a building permit is not required for a single-family residence unless a local jurisdiction adopts one; unincorporated Carbon County has no county building-cod…
Montana DLI Building Codes - Building Permit FAQ ↗Musselshell County (and Roundup) is not among Montana's certified local building-code jurisdictions, so it falls under the State Building Codes Bureau, which does not enforce a …
Montana DLI Building Codes Program - Certified Government Programs ↗Montana exempts single-family residences from the state building permit unless a local government requires one by ordinance; no certified local building-code program was found f…
Montana DLI Building Codes Program - Building Permit FAQ ↗Wheatland County's official department listing includes no building department; Montana does not enforce a residential building code in rural unincorporated areas unless a count…
Wheatland County, Montana - Departments ↗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 ↗Yellowstone County does not issue building permits outside Billings city limits, and Montana state law exempts residential buildings with fewer than five dwelling units outside …
Montana DLI - Is a State Building Permit Needed? ↗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 ↗Golden Valley County (seat Ryegate) lists no building department or building-permit program on its official site; consistent with Montana, rural counties do not enforce a reside…
Golden Valley County, Montana ↗Montana does not enforce a residential building code in unincorporated rural counties unless locally adopted; Liberty County lists no building-permit department, so no county bu…
Montana DLI Building Codes Bureau - Building Permits ↗Roosevelt County has no building department and is not on the MT DLI certified list, so unincorporated areas fall under the State Building Codes Bureau, which does not enforce r…
MT DLI Certified City, County and Town Programs ↗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) ↗Blaine County is not on the Montana DLI list of certified local building code jurisdictions; such areas fall under the State Building Codes Bureau, which does not enforce buildi…
Montana DLI Certified City, County and Town Programs ↗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 does not require a state building permit for a single-family residence unless the site is within a local government program that requires one by ordinance, and no local …
Montana Dept. of Labor & Industry, Building Codes Permit FAQ ↗Montana has no statewide residential building code enforcement in rural counties unless adopted; Daniels County Planning administers subdivision and zoning only, with no local b…
Daniels County Planning ↗Phillips County and Malta are not on Montana's list of certified local building-code jurisdictions, and the state exempts residential buildings with fewer than five dwelling uni…
Montana DLI - Certified City, County and Town Building Code Programs ↗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 ↗Montana's state building code exempts residential buildings with fewer than five dwelling units, and this remote county (pop. ~1,200, seat Jordan) has no certified local buildin…
Montana DLI - Building Codes and Permits ↗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.
