City Building Permits
Lewistown, MT - 2026 Building Permit Guide
How to apply for a building permit in Lewistown, Montana. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
All properties within the incorporated City of Lewistown.
- Department
- City of Lewistown Building Department
- Address
- 308 4th Avenue South, Lewistown, MT 59457
- Phone
- (406) 535-1760
Application Process
- Contact Building Department to determine if permit is required
- Obtain Building Permit Application form from city (available at office or by request)
- Prepare construction plans with required information
- Complete application with all necessary documentation
- Submit application and plans to Building Department (in person or by mail)
- Department reviews plans and provides approval or comments
- Address any comments and resubmit if needed
- Pay permit fees
- Receive building permit
- Display permit on construction site
- Schedule and pass required inspections (foundation, framing, mechanical, electrical, plumbing, final)
General Requirements
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.
Required Documents
- 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
- Permit validity
- Typical validity 180 days (standard Montana practice); confirm with Building Department
- Building code
- 2021 edition of the International Building Codes
- 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.
Fees
- Permit fee formula
- 1-2% of building valuation (standard Montana formula)
Fees change. Verify current amounts at the official fee schedule.
Work That Does NOT Require a Permit
Contact the City of Lewistown Building Department to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
- (406) 535-1760 (phone)
- Scheduling deadline
- At least 24 hours notice preferred
- Inspection hours
- Standard business hours
Typical inspection 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.
Additional Resources
- Building code: 2021 edition of the International Building Codes
- City of Lewistown
- Building Inspection
- Forms & Applications
- Plans & Documents
- 2021 Code Adoption Document
- 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 Lewistown Building Department before applying.
Frequently Asked Questions
Lewistown Building Permit FAQ
- Do I need a building permit in Lewistown, MT?
- 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.
- How much does a building permit cost in Lewistown, MT?
- Fees are calculated as: 1-2% of building valuation (standard Montana formula).
- How do I apply for a building permit in Lewistown, MT?
- 1. Contact Building Department to determine if permit is required 2. Obtain Building Permit Application form from city (available at office or by request) 3. Prepare construction plans with required information 4. Complete application with all necessary documentation 5. Submit application and plans to Building Department (in person or by mail) 6. Department reviews plans and provides approval or comments 7. Address any comments and resubmit if needed 8. Pay permit fees 9. Receive building permit 10. Display permit on construction site 11. Schedule and pass required inspections (foundation, framing, mechanical, electrical, plumbing, final)
- What work is exempt from building permits in Lewistown, MT?
- The following work is generally exempt: Farm/ranch buildings (if outside city limits); Owner-occupied single-family dwellings under 5 units; Private garages for owner's own use (non-commercial); Certain minor repairs and maintenance. Note: Confirm exempt work status with Building Department before starting any project.
- How do I schedule a building inspection in Lewistown, MT?
- Inspections can be scheduled via: (406) 535-1760. At least 24 hours notice preferred.
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