Three Forks, MT — 2026 Building Permit Guide

On this page 6

§ 01

Permit authority

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

Street address

206 Main Street, Three Forks, MT 59752

Phone

406-285-3431

Coverage

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.

Website

Department website

Additional resources

City Website ↗

§ 02

When a permit is required

Permit triggers and exempt work for Three Forks

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.

Note: Not confirmed specifically for Three Forks. Zoning Permits are broadly required for any structure including sheds, carports, decks, and porches, suggesting few if any structural exemptions at the zoning level. Contact City Hall for the complete list.

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

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).
Permit validity: Contact 406-285-3431 for expiration details.
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.

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

§ 03

Application process

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

01

Contact City Hall at 406-285-3431 to determine which permits are required (Zoning Permit, Flood Permit, and/or State Building Permit).
02

Obtain a Zoning Permit Application from City Hall.
03

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.
04

Submit the completed Zoning Permit Application with payment to City Hall.
05

For commercial construction: contact the State Building Inspector (State DLI Building Codes Program, 406-841-2056) and obtain a state building permit.
06

Once permits are issued, post on job site and begin work.
07

Schedule required inspections through City Hall and/or the state inspector.
08

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) ↗

§ 04

Fee schedule

Three Forks building permit fees

Fee type

Amount

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 made at City Hall. Accepted payment methods not confirmed; contact 406-285-3431.

§ 05

Required inspections

Scheduling and sequence

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

Contact City Hall regarding remote inspection availability.

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

§ 06

Frequently asked

Common questions about Three Forks permits

01 Do I need a building permit in Three Forks, MT? ▸

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

Building permit fees in Three Forks, MT are set by the local building department and vary by project type and valuation. 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..

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

To apply for a building permit in Three Forks, MT, follow these steps: 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.

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

Building permit processing times in Three Forks, MT typically run Not confirmed. Contact 406-285-3431 for current timelines.. Timelines can vary based on project complexity and current department workload.

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

Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Three Forks, MT 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..

last verified March 2026 source City of Three Forks, City Hall (Zoning and Planning) ↗ entry id permits/montana/gallatin/three-forks

Report a correction

Educational reference. Permit rules and fees change — confirm current requirements directly with City of Three Forks, City Hall (Zoning and Planning) before applying. Jaspector is not legal advice.

City of Three Forks

Other jurisdictions in Gallatin County.