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§ 02
When a permit is required
Permit triggers and exempt work for Thompson Falls
New construction, additions, alterations, repairs, renovations, demolition, and other structural changes
Farm and ranch buildings
Mining buildings on mining property
Petroleum refineries and pulp and paper mills (except office and shop buildings)
Residential buildings with less than five dwelling units (except transient use)
Private garages and private storage for owner's own use
Some agricultural and minor structures
- Exempt Farm and ranch buildings
- Exempt Mining buildings on mining property
- Exempt Petroleum refineries and pulp and paper mills (except office and shop buildings)
- Exempt Residential buildings with less than five dwelling units (except transient use)
- Exempt Private garages and private storage for owner's own use
- Exempt Some agricultural and minor structures
Note: Trade permits still required where applicable (electrical, plumbing, mechanical). Per Montana state law which applies within city
Required documents
- Complete construction plans and specifications
- Architectural drawings
- Site plans
- Proof of property ownership
- Building permit application form
- City-specific forms
- Building code
- 2021 International Building Code (IBC 2021) as adopted by the State of Montana and incorporated into Thompson Falls ordinances
§ 03
Application process
Typical processing: Approximately 3 weeks for plan review (standard Montana timeframe)
- 01 Contact City of Thompson Falls City Hall to determine if city or state jurisdiction applies
- 02 Prepare construction plans, architectural drawings, site plans, and required documentation
- 03 Submit application and plans to City Hall (in person or by mail)
- 04 City reviews for compliance with Thompson Falls ordinances and adopted building codes
- 05 Upon approval, pay permit fees and obtain permit
- 06 Proceed with construction per approved plans
- 07 Schedule required inspections with city
- 08 After all inspections pass, obtain certificate of occupancy
Typical processing time: Approximately 3 weeks for plan review (standard Montana timeframe)
§ 04
Required inspections
Scheduling and sequence
How to schedule
- Contact City Hall at (406) 827-3557 (phone)
- Inspection hours
- 9:00 a.m. to 5:00 p.m. Monday-Thursday; 9:00 a.m. to 12:00 p.m. Friday
Typical sequence: Typical sequence includes foundation, framing, electrical, plumbing, mechanical, and final inspections. Final inspection clearance required before occupancy
§ 05
Frequently asked
Common questions about Thompson Falls permits
01 Do I need a building permit in Thompson Falls, MT? ▸
New construction, additions, alterations, repairs, renovations, demolition, and other structural changes
02 How do I apply for a building permit in Thompson Falls, MT? ▸
To apply for a building permit in Thompson Falls, MT, follow these steps: 1. Contact City of Thompson Falls City Hall to determine if city or state jurisdiction applies 2. Prepare construction plans, architectural drawings, site plans, and required documentation 3. Submit application and plans to City Hall (in person or by mail) 4. City reviews for compliance with Thompson Falls ordinances and adopted building codes 5. Upon approval, pay permit fees and obtain permit 6. Proceed with construction per approved plans 7. Schedule required inspections with city 8. After all inspections pass, obtain certificate of occupancy
03 How long does it take to get a building permit in Thompson Falls, MT? ▸
Building permit processing times in Thompson Falls, MT typically run Approximately 3 weeks for plan review (standard Montana timeframe). Timelines can vary based on project complexity and current department workload.
04 What work is exempt from building permits in Thompson Falls, MT? ▸
Not all construction work requires a permit in Thompson Falls, MT. The following work is generally exempt: Farm and ranch buildings; Mining buildings on mining property; Petroleum refineries and pulp and paper mills (except office and shop buildings); Residential buildings with less than five dwelling units (except transient use); Private garages and private storage for owner's own use; Some agricultural and minor structures. Note: Trade permits still required where applicable (electrical, plumbing, mechanical). Per Montana state law which applies within city When in doubt, confirm with the local building department before starting work.
05 How do I schedule a building inspection in Thompson Falls, MT? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in Thompson Falls, MT via: Contact City Hall at (406) 827-3557.
last verified March 2026
source City of Thompson Falls Building Department ↗
entry id permits/montana/sanders/thompson-falls
Educational reference. Permit rules and fees change — confirm current requirements directly with City of Thompson Falls Building Department before applying. Jaspector is not legal advice.