Unincorporated Glacier County, Montana does not require a building permit for a single-family home, because the county is not a certified local building-code jurisdiction and Montana's own rule exempts single-family residences outside those certified jurisdictions1. Other non-exempt buildings still need a state building permit from Montana's Building Codes Bureau, since only Cut Bank's city limits run a certified local program23. No countywide zoning ordinance was found for Glacier County4. Septic (drainfield) permits go through the county's Sanitarian, even when a subdivision already has state sanitation approval5.
At a glance
- Building permit, single-family home
- Not required outside Cut Bank city limits1
- Building permit, other non-exempt buildings
- Required from the state Building Codes Bureau, not the county2
- County zoning
- No countywide zoning ordinance found4
- Septic/drainfield permit
- Required through the County Sanitarian, even with a state sanitation approval56
- Septic soils
- Only 6.2% of soils rated free of severe limits for a conventional drain field7
- Well / groundwater permit
- Not required at or below 35 gallons per minute and 10 acre-feet a year8
- Driveway onto a state highway
- Requires an MDT approach permit or right-of-way agreement9
- Floodplain development
- Requires a permit if the parcel is in a designated flood hazard area10
Who to call
Building permits
Montana Building and Commercial Measurements Bureau (State Building Codes Bureau)
State building permits and inspections for non-exempt buildings in Glacier County outside Cut Bank city limits, the county's only certified local building-code jurisdiction
P.O. Box 200517, Helena, MT 59602
Septic permits
Drainfield / onsite wastewater permitting for Glacier County
512 East Main Street, Cut Bank, Montana 59427
Roads & driveways
Glacier County Road Department
County road questions; approaches onto state highways instead need a Montana Department of Transportation permit
512 East Main Street, Cut Bank, Montana 59427
Also useful
Glacier County Clerk & Recorder
Recording, general county administration, and confirming current zoning or ordinance status
512 East Main Street, Cut Bank, Montana 59427
Also useful
Glacier County Office of Emergency Management
Emergency management; a starting point for confirming which office currently serves as Glacier County's floodplain administrator, which this review could not independently confirm
512 East Main Street, Cut Bank, Montana 59427
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Glacier County, Montana?
Unincorporated Glacier County does not require a building permit for a single-family residence, because Montana's building-permit rule exempts single-family homes outside a certified local government's jurisdiction, and only Cut Bank's city limits run a certified building-code program in Glacier County13. The county's own permit records corroborate that no residential building code has been adopted locally outside that certified area11. A state building permit is still required for other non-exempt buildings, including most commercial and multi-family structures, before plumbing, mechanical, or electrical permits can be issued2. Montana's statewide exemptions also cover farm and ranch buildings, private garages, and private storage buildings used by the owner outside a commercial enterprise12.
Who handles building and septic permits in Glacier County?
Glacier County has no local building department; construction outside Cut Bank's certified area is permitted and inspected by Montana's Building and Commercial Measurements Bureau in Helena13. Septic (drainfield) permits go through the Glacier County Sanitarian, whose office is at 512 East Main Street in Cut Bank14. Road questions on county-maintained roads go to the Glacier County Road Department, while general county administration and recording questions go to the Clerk & Recorder1516. This review could not confirm which office currently serves as Glacier County's floodplain administrator; the Office of Emergency Management is a reasonable starting point17.
Does Glacier County have zoning?
No countywide zoning ordinance for Glacier County was found in the county's official department directory or on the county's site4. Montana law lets a board of county commissioners adopt zoning only after it has adopted a growth policy under state law18. No record of Glacier County adopting a growth policy and countywide zoning was found, but that absence is not proof either way, so confirm current status with the Clerk & Recorder before assuming your land is unrestricted16. Rules for RVs, tiny homes, manufactured homes, minimum dwelling size, and setbacks on private land in Glacier County were not confirmed by any official source, so treat the lack of a found rule as unconfirmed, not as permission.
How do septic and well permits work in Glacier County?
A drainfield permit from the local health department is required in Glacier County even when a property already has a state Certificate of Subdivision Approval519. Montana splits sanitation authority between state subdivision review and local drainfield permitting, and Glacier County's Sanitarian is the office that issues the local permit206. Only 6.2% of Glacier County's soils are rated free of severe limitations for a conventional septic drain field, so a site evaluation matters before you assume a standard system will work7. For a well or other groundwater development, Montana does not require a water-right permit at or below 35 gallons per minute and 10 acre-feet a year, but starting January 1, 2026, anyone using that exception must file a Notice of Intent with the state water agency before using the water8.
Can you live in an RV or tiny home on your land in Glacier County?
No Glacier County or Montana source confirms or prohibits long-term RV or tiny-home occupancy on private land in the county; this was researched and not established either way, so ask the Clerk & Recorder before you buy with that plan16. Montana's camping rules for Fish, Wildlife & Parks public-use sites are a separate system: they cap camping at 7 nights in any 30-day period and require campsites to be vacated by early afternoon on departure day, and they say nothing about occupancy on privately owned land21. Do not treat an FWP public-use-area camping limit as an answer to whether you can live in an RV on your own parcel in Glacier County.
Building a home in Glacier County: the steps, in order
- Confirm your parcel's soil conditions before you buy; most of Glacier County's soils are rated severely limited for a standard septic drain field7.
- Apply for a drainfield permit through the Glacier County Sanitarian; a state Certificate of Subdivision Approval does not replace this permit145.
- If you plan a well, confirm whether your use stays at or below 35 gallons per minute and 10 acre-feet a year; if so, file the required Notice of Intent with the state before using the water8.
- If your project is a single-family home outside Cut Bank's city limits, no state or county building permit is required; other non-exempt buildings need a state building permit from the Building and Commercial Measurements Bureau before construction starts113.
- If your driveway connects to a state highway, apply for an MDT approach permit or right-of-way agreement before you build it; county-road approaches instead go through the Road Department915.
- If any part of the parcel is in a designated flood hazard area, get a floodplain development permit from the local floodplain administrator before you build10.
- Confirm zoning and any local ordinance status with the Clerk & Recorder before finalizing plans, since no zoning ordinance was confirmed but none was ruled out either16.
What to check before you buy land in Glacier County
Water and septic: only 6.2% of the county's soils are rated free of severe limitations for a conventional septic drain field, so budget for a site evaluation and possibly an engineered system7. Terrain and cover: 52.4% of the county's land sits at 15% slope or less, 22.9% is wooded, and 24.1% is federal land, which affects both buildable area and neighbors222324. Climate: Glacier County averages just 24.1 inches of precipitation a year, sees severe drought in about 13.7% of years, and averages 39.8°F annually, with only about 0.4 projected days a year at or above 100°F by mid-century25262728. Access: the county sits about 209 miles from the nearest metro area with a population density of 4.5 people per square mile, about as rural as it gets2930. Taxes and insurance: the effective property tax rate is about 0.8%, the median property tax bill is about $1,246 a year, and a typical home insurance premium runs about $1,371 a year313233. Flood risk: check FEMA flood maps for the parcel, since development anywhere in a designated flood hazard area needs a permit10.
Watch-outs
- The single-family building-permit exemption applies only outside Cut Bank's city limits; land annexed into Cut Bank falls under that city's certified program instead3.
- Glacier County's zoning status is unconfirmed, not verified 'no zoning'; confirm with the Clerk & Recorder before assuming your land is unrestricted4.
- Montana's FWP public-use-site camping limits do not answer whether you can live in an RV on your own land in Glacier County; treat that as unconfirmed21.
- Starting January 1, 2026, using the small-well permit exception requires filing a Notice of Intent with the state before using the water, not just staying under the flow and volume caps8.
- Most of Glacier County's soils are poorly suited to a conventional septic drain field; get a site evaluation before you buy or plan a home's location7.
Sources
- Frequently Asked Questions, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- Certified City, County and Town Programs, quoted and re-checked
- Glacier County - Department Directory (2026 county census)
- Engineering Infrastructure & Subdivisions, quoted and re-checked
- Glacier County - Department Directory (Sanitarian) (2026 county census)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Exceptions To Permit Requirements, quoted and re-checked
- Approach Manual for Landowners and Developers, quoted and re-checked
- Stream Permitting (Montana statewide rule), quoted and re-checked
- Montana DLI - Certified City, County and Town Building Code Programs (2026 county census)
- Certified City, County and Town Programs, quoted and re-checked
- Montana Building and Commercial Measurements Bureau (State Building Codes Bureau) (bsd.dli.mt.gov)
- Glacier County Sanitarian (glaciercountymt.gov)
- Glacier County Road Department (glaciercountymt.gov)
- Glacier County Clerk & Recorder (glaciercountymt.gov)
- Glacier County Office of Emergency Management (glaciercountymt.gov)
- 76-2-201. County zoning authorized, MCA (Montana statewide rule), quoted and re-checked
- Engineering Infrastructure & Subdivisions (Montana statewide rule), quoted and re-checked
- Engineering Infrastructure & Subdivisions (Montana statewide rule), quoted and re-checked
- Public Use Rules and Regulations (Montana statewide rule), quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Federal land share: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Average annual temperature: Bolthole Index county data
- Projected mid-century days at or above 100°F: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Population density: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.