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When a permit is required
Permit triggers and exempt work for Lewistown
New construction of any structure, additions and modifications to existing buildings, significant renovations (roof replacement, structural repairs), decks, patios, porches (if over certain size), garages, guest houses, storage buildings, internal mechanical/electrical/plumbing work over certain scope.
- Exempt Farm/ranch buildings (if outside city limits)
- Exempt Owner-occupied single-family dwellings under 5 units
- Exempt Private garages for owner's own use (non-commercial)
- Exempt Certain minor repairs and maintenance
Note: Confirm exempt work status with Building Department before starting any project.
- Completed Building Permit Application
- Site plan showing property boundaries and building location
- Architectural/structural plans with details
- Electrical, mechanical, plumbing plans (if applicable)
- Project cost estimate
- Property survey or location map
- Building code
- 2021 edition of the International Building Codes
- Permit validity
- Typical validity 180 days (standard Montana practice); confirm with Building Department
- Owner-builder
- Property owner may act as general contractor. All work must meet code requirements and pass inspections.
- Contractor requirements
- Contractors must have valid City of Lewistown business license. State construction contractor registration/ICEC also required.
Application process
Application → plan check → issuance → inspection → final
- 01 Contact Building Department to determine if permit is required
- 02 Obtain Building Permit Application form from city (available at office or by request)
- 03 Prepare construction plans with required information
- 04 Complete application with all necessary documentation
- 05 Submit application and plans to Building Department (in person or by mail)
- 06 Department reviews plans and provides approval or comments
- 07 Address any comments and resubmit if needed
- 08 Pay permit fees
- 09 Receive building permit
- 10 Display permit on construction site
- 11 Schedule and pass required inspections (foundation, framing, mechanical, electrical, plumbing, final)
Fee schedule
Lewistown building permit fees
Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.
Required inspections
Scheduling and sequence
- (406) 535-1760 (phone)
- Scheduling deadline
- At least 24 hours notice preferred
- Inspection hours
- Standard business hours
Typical sequence: Required inspections: foundation, framing, rough-in (mechanical/electrical/plumbing), final. Inspector provides written report for each inspection. Corrections must be completed before proceeding to next phase. Final inspection approval grants Certificate of Occupancy.
Frequently asked
Common questions about Lewistown permits
01 Do I need a building permit in Lewistown, MT? ▸
02 How much does a building permit cost in Lewistown, MT? ▸
03 How do I apply for a building permit in Lewistown, MT? ▸
04 What work is exempt from building permits in Lewistown, MT? ▸
05 How do I schedule a building inspection in Lewistown, MT? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with City of Lewistown Building Department before applying. Jaspector is not legal advice.