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§ 02
When a permit is required
Permit triggers and exempt work for Flathead County
Most new construction; alterations; additions and repairs (with exceptions noted below)
Farm and ranch buildings
Mining buildings on mining property
Petroleum refineries and pulp/paper mills (except office and shop buildings)
Residential buildings containing less than five dwelling units (except when serving transient guests)
Private garages and private storage buildings used for owner's own use (not part of commercial enterprise or business)
Some minor repairs (inquiry to bureau may be required to determine exemption status)
- Exempt Farm and ranch buildings
- Exempt Mining buildings on mining property
- Exempt Petroleum refineries and pulp/paper mills (except office and shop buildings)
- Exempt Residential buildings containing less than five dwelling units (except when serving transient guests)
- Exempt Private garages and private storage buildings used for owner's own use (not part of commercial enterprise or business)
- Exempt Some minor repairs (inquiry to bureau may be required to determine exemption status)
Note: Certain zoning districts (BS, BR-4, HO, I-1H, WV) require site plan review prior to construction start even if building permit exemption applies
Required documents
- Building plans meeting state code
- Building Permit/Plan Review Application
- Site plan (for certain zoning districts)
- Erosion control plan (when applicable)
- Building code
- Montana Building Code 2021 (based on 2021 IBC), adopted statewide June 9, 2022. Includes 2021 IRC, 2021 IECC, 2021 IMC, 2021 IFGC, 2021 UPC, 2020 NEC, 2021 ISPSC, 2021 IWUIC
- Permit validity
- Contact Montana Building Codes Bureau for specific validity period
- Owner-builder
- Allowed; minimal restrictions in Montana
- Contractor requirements
- State contractor registration required for most work. Independent contractors without employees may be exempt from registration but can voluntarily register. Construction contractors with employees must register with Montana Department of Labor and Industry ($70 non-refundable fee)
Source: Montana Building Codes Program - Employment Standards Division ↗
§ 03
Application process
Typical processing: 3 weeks average for initial plan review; exact timeline depends on plan completeness and inspection availability
- 01 Determine if property is in unincorporated Flathead County (outside Kalispell, Whitefish, or Columbia Falls city limits)
- 02 Submit Building Permit/Plan Review Application and construction plans to Montana Building Codes Program
- 03 Plans are reviewed by state building inspector (3 weeks average for review)
- 04 Receive plan review comments via mail or email
- 05 Answer all plan review comments in writing
- 06 Pay applicable fees
- 07 Building permit is issued once all comments addressed and fees paid
- 08 Schedule inspections once permit is issued and work begins
- 09 Obtain final inspection sign-off when work is complete
Typical processing time: 3 weeks average for initial plan review; exact timeline depends on plan completeness and inspection availability
Source: Montana Building Codes Program - Employment Standards Division ↗
§ 04
Fee schedule
Flathead County building permit fees
Fee type
Amount
01
Plan check fee
Included in building permit application fee
02
Permit fee formula
Specific amounts not publicly available; contact bureau at (406) 841-2056 or buildingcodes@mt.gov for current fee schedule
Applicants receive fees and plan review comments via mail or email
§ 05
Required inspections
Scheduling and sequence
How to schedule
- Call state inspector (phone)
- Scheduling deadline
- 24 hours notice recommended
- Time windows
- Inspector must perform inspection within 72 hours of notification
Typical sequence: Foundation, framing, electrical, plumbing, and final inspection typically required at various construction stages as required by codes and permit conditions
Source: Montana Building Codes Program - Employment Standards Division ↗
§ 06
Frequently asked
Common questions about unincorporated Flathead County permits
01 Do I need a building permit in unincorporated Flathead County, MT? ▸
Most new construction; alterations; additions and repairs (with exceptions noted below)
02 How much does a building permit cost in unincorporated Flathead County, MT? ▸
Building permit fees in unincorporated Flathead County, MT are set by the local building department and vary by project type and valuation. Fees are calculated as: Specific amounts not publicly available; contact bureau at (406) 841-2056 or buildingcodes@mt.gov for current fee schedule. Plan check fee: Included in building permit application fee.
03 How do I apply for a building permit in unincorporated Flathead County, MT? ▸
To apply for a building permit in unincorporated Flathead County, MT, follow these steps: 1. Determine if property is in unincorporated Flathead County (outside Kalispell, Whitefish, or Columbia Falls city limits) 2. Submit Building Permit/Plan Review Application and construction plans to Montana Building Codes Program 3. Plans are reviewed by state building inspector (3 weeks average for review) 4. Receive plan review comments via mail or email 5. Answer all plan review comments in writing 6. Pay applicable fees 7. Building permit is issued once all comments addressed and fees paid 8. Schedule inspections once permit is issued and work begins 9. Obtain final inspection sign-off when work is complete
04 How long does it take to get a building permit in unincorporated Flathead County, MT? ▸
Building permit processing times in unincorporated Flathead County, MT typically run 3 weeks average for initial plan review; exact timeline depends on plan completeness and inspection availability. Timelines can vary based on project complexity and current department workload.
05 What work is exempt from building permits in unincorporated Flathead County, MT? ▸
Not all construction work requires a permit in unincorporated Flathead County, MT. The following work is generally exempt: Farm and ranch buildings; Mining buildings on mining property; Petroleum refineries and pulp/paper mills (except office and shop buildings); Residential buildings containing less than five dwelling units (except when serving transient guests); Private garages and private storage buildings used for owner's own use (not part of commercial enterprise or business); Some minor repairs (inquiry to bureau may be required to determine exemption status). Note: Certain zoning districts (BS, BR-4, HO, I-1H, WV) require site plan review prior to construction start even if building permit exemption applies When in doubt, confirm with the local building department before starting work.
06 How do I schedule a building inspection in unincorporated Flathead County, MT? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Flathead County, MT via: Call state inspector. 24 hours notice recommended.
last verified March 2026
source Montana Building Codes Program - Employment Standards Division ↗
entry id permits/montana/flathead/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Montana Building Codes Program - Employment Standards Division before applying. Jaspector is not legal advice.