How much does a building permit cost in Three Forks, MT?

The minimum permit fee is After-the-fact permits are a minimum of $100 or 2x the standard fee (whichever is greater), plus hourly rates for planner (beyond 3 hours), attorney (beyond 2 hours), and all engineering fees incurred.. Fees are calculated as: Not confirmed for standard permits. Contact City Hall for the current fee schedule..

How do I apply for a building permit in Three Forks, MT?

1. Contact City Hall at 406-285-3431 to determine which permits are required (Zoning Permit, Flood Permit, and/or State Building Permit). 2. Obtain a Zoning Permit Application from City Hall. 3. If the property is in or near a floodplain (AE flood zone), apply for a Flood Permit well in advance; include a preliminary flood elevation certificate if required. 4. Submit the completed Zoning Permit Application with payment to City Hall. 5. For commercial construction: contact the State Building Inspector (State DLI Building Codes Program, 406-841-2056) and obtain a state building permit. 6. Once permits are issued, post on job site and begin work. 7. Schedule required inspections through City Hall and/or the state inspector. 8. Pass all required inspections and receive final approval.

How long does it take to get a building permit in Three Forks, MT?

Typical processing time is Not confirmed. Contact 406-285-3431 for current timelines..

How do I schedule a building inspection in Three Forks, MT?

Inspections can be scheduled via: 406-285-3431 (City Hall), 406-841-2056 (State Building Inspector for state-permitted commercial work). Contact City Hall or state inspector to schedule..

City Building Permits

Three Forks, MT - 2026 Building Permit Guide

How to apply for a building permit in Three Forks, Montana. Permit authority, application steps, fees, and inspection requirements.

Montana Gallatin County Updated March 2026

Permit Authority

Three Forks issues Zoning Permits for all structures within city limits. Commercial construction also requires a state building permit from the Montana DLI Building Codes Program. Residential building permits may also be handled via state DLI; confirm with City Hall.

Department: City of Three Forks, City Hall (Zoning and Planning)
Address: 206 Main Street, Three Forks, MT 59752
Phone: 406-285-3431
Website: https://www.threeforksmontana.us/zoning-planning

Application Process

Contact City Hall at 406-285-3431 to determine which permits are required (Zoning Permit, Flood Permit, and/or State Building Permit).
Obtain a Zoning Permit Application from City Hall.
If the property is in or near a floodplain (AE flood zone), apply for a Flood Permit well in advance; include a preliminary flood elevation certificate if required.
Submit the completed Zoning Permit Application with payment to City Hall.
For commercial construction: contact the State Building Inspector (State DLI Building Codes Program, 406-841-2056) and obtain a state building permit.
Once permits are issued, post on job site and begin work.
Schedule required inspections through City Hall and/or the state inspector.
Pass all required inspections and receive final approval.

Typical processing time: Not confirmed. Contact 406-285-3431 for current timelines.

Source: City of Three Forks, City Hall (Zoning and Planning)

General Requirements

A Zoning Permit is required before any building or structure is erected, moved, or added to -- including storage sheds, carports, decks, porches, and any type of structure. Commercial construction additionally requires a state building permit.

Required Documents

Completed Zoning Permit Application
Preliminary flood elevation certificate if the property is in an AE flood zone
Additional documents may be required for commercial or state-permitted projects

Permit validity: Contact 406-285-3431 for expiration details.
Building code: Not confirmed for residential in Three Forks (may rely on state DLI codes). Commercial construction is subject to state DLI building codes (2021 IBC with Montana amendments).
Owner-builder: Contact City Hall for owner-builder specific requirements.
Contractor requirements: State Construction Contractor Registration required (Montana DLI). Local requirements: confirm with City Hall.

Fees

Minimum permit fee: After-the-fact permits are a minimum of $100 or 2x the standard fee (whichever is greater), plus hourly rates for planner (beyond 3 hours), attorney (beyond 2 hours), and all engineering fees incurred.
Permit fee formula: Not confirmed for standard permits. Contact City Hall for the current fee schedule.
Payment note: Payment made at City Hall. Accepted payment methods not confirmed; contact 406-285-3431.

Work That Does NOT Require a Permit

Contact the City of Three Forks, City Hall (Zoning and Planning) to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

406-285-3431 (City Hall) (phone)
406-841-2056 (State Building Inspector for state-permitted commercial work) (phone)

Scheduling deadline: Contact City Hall or state inspector to schedule.
Inspection hours: City Hall hours not confirmed. Contact 406-285-3431 for details.
Time windows: Contact City Hall or state inspector for available windows.

Typical inspection sequence: Not confirmed. Contact City Hall or state inspector for the specific inspection sequence.

Contact City Hall regarding remote inspection availability.

Additional Resources

Building code: Not confirmed for residential in Three Forks (may rely on state DLI codes). Commercial construction is subject to state DLI building codes (2021 IBC with Montana amendments).
Verify contractor license: Montana Contractor Registration
Zoning information: View zoning info
Impact Fee Advisory Committee
City Hall
Three Forks Municipal Code
License lookup guide: Montana Contractor License Requirements
Contract template: Montana Homeowner-Contractor Agreement
Montana hub: Montana Contractor License & Permit Hub

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the City of Three Forks, City Hall (Zoning and Planning) before applying.

Frequently Asked Questions

Three Forks Building Permit FAQ

Do I need a building permit in Three Forks, MT?: A Zoning Permit is required before any building or structure is erected, moved, or added to -- including storage sheds, carports, decks, porches, and any type of structure. Commercial construction additionally requires a state building permit.
How much does a building permit cost in Three Forks, MT?: The minimum permit fee is After-the-fact permits are a minimum of $100 or 2x the standard fee (whichever is greater), plus hourly rates for planner (beyond 3 hours), attorney (beyond 2 hours), and all engineering fees incurred.. Fees are calculated as: Not confirmed for standard permits. Contact City Hall for the current fee schedule..
How do I apply for a building permit in Three Forks, MT?: 1. Contact City Hall at 406-285-3431 to determine which permits are required (Zoning Permit, Flood Permit, and/or State Building Permit). 2. Obtain a Zoning Permit Application from City Hall. 3. If the property is in or near a floodplain (AE flood zone), apply for a Flood Permit well in advance; include a preliminary flood elevation certificate if required. 4. Submit the completed Zoning Permit Application with payment to City Hall. 5. For commercial construction: contact the State Building Inspector (State DLI Building Codes Program, 406-841-2056) and obtain a state building permit. 6. Once permits are issued, post on job site and begin work. 7. Schedule required inspections through City Hall and/or the state inspector. 8. Pass all required inspections and receive final approval.
How long does it take to get a building permit in Three Forks, MT?: Typical processing time is Not confirmed. Contact 406-285-3431 for current timelines..
How do I schedule a building inspection in Three Forks, MT?: Inspections can be scheduled via: 406-285-3431 (City Hall), 406-841-2056 (State Building Inspector for state-permitted commercial work). Contact City Hall or state inspector to schedule..

Need help with your project?

Navigating permits in Three Forks can be complicated.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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