Flathead County, MT - 2026 Building Permit Guide

Permit Authority

Unincorporated Flathead County (outside Kalispell, Whitefish, and Columbia Falls city limits). Building permits for unincorporated areas are administered by the State Department of Labor and Industry, not the county. County Planning and Zoning handles zoning and subdivision review only.

Department

Montana Building Codes Program - Employment Standards Division

Address

301 S. Park Avenue, 4th Floor, Helena, MT 59602

Phone

(406) 841-2056

Email

buildingcodes@mt.gov

Website

https://bsd.dli.mt.gov/building-codes-permits/

Online Permit Portal

Application Process

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

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

General Requirements

Most new construction; alterations; additions and repairs (with exceptions noted below)

Required Documents

• Building plans meeting state code
• Building Permit/Plan Review Application
• Site plan (for certain zoning districts)
• Erosion control plan (when applicable)

Permit validity

Contact Montana Building Codes Bureau for specific validity period

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

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)

Fees

Plan check fee

Included in building permit application fee

Permit fee formula

Specific amounts not publicly available; contact bureau at (406) 841-2056 or buildingcodes@mt.gov for current fee schedule

Payment note

Applicants receive fees and plan review comments via mail or email

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

Contact the Montana Building Codes Program - Employment Standards Division to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

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Scheduling deadline

24 hours notice recommended

Time windows

Inspector must perform inspection within 72 hours of notification

Typical inspection sequence: Foundation, framing, electrical, plumbing, and final inspection typically required at various construction stages as required by codes and permit conditions

Additional Resources

• 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
• Zoning information: View zoning info
• Flathead County Planning and Zoning
• State Building Codes Program
• License lookup guide: Montana Contractor License Requirements
• Contract template: Montana Homeowner-Contractor Agreement
• Montana hub: Montana Contractor License & Permit Hub

Frequently Asked Questions

Flathead County Building Permit FAQ

Do I need a building permit in unincorporated Flathead County, MT?

Most new construction; alterations; additions and repairs (with exceptions noted below)

How much does a building permit cost in unincorporated Flathead County, MT?

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.

How do I apply for a building permit in unincorporated Flathead County, MT?

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

How long does it take to get a building permit in unincorporated Flathead County, MT?

Typical processing time is 3 weeks average for initial plan review; exact timeline depends on plan completeness and inspection availability.

What work is exempt from building permits 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

How do I schedule a building inspection in unincorporated Flathead County, MT?

Inspections can be scheduled via: . 24 hours notice recommended.