Do I Need a Permit to Install Solar Panels in Montana?
Solar panel permit requirements. Permits, inspections, utility interconnection, and available incentives.
Yes — both a building and electrical permit are required.
Two Permits Required
Solar installations require a building permit (for structural mounting on your roof or ground) and an electrical permit (for wiring from panels to inverter to panel). Most solar installers handle the entire permitting process as part of their service.
Roof Access Requirements
Fire code requires 3-foot access pathways on the roof for firefighter access. Panels cannot cover the entire roof — specific setbacks from ridges, valleys, and edges are required. Your installer will design the layout to comply.
Utility Interconnection
Before your system can be energized and connected to the grid, you need an interconnection agreement with your local utility. This is separate from the city permit. Your installer typically handles this, but it can add 2-4 weeks to the timeline.
Incentives (Read This Carefully — They Change Often)
Solar incentives shift frequently and vary by state and utility, so don't rely on older guides. State tax credits and the federal residential Clean Energy Credit (the ITC, Section 25D) have changed eligibility windows in recent years, and some may no longer apply to new installations. Your utility may offer net-billing terms or limited rebates. Because programs change often, confirm exactly what is available the week you sign — and never let an installer's quote assume a credit that no longer exists.
Yes, permits are required but your solar installer handles them. Budget 5-14 days for permit review plus 2-4 weeks for utility interconnection.
Permit fees by city in Montana
Verified from each city’s published fee schedule. Where a city has no separate fee listed for this project, open the city page for the current requirements and amount.
| City | Permit fee | Source |
|---|---|---|
| Anaconda-Deer Lodge | $200Verified | Electrical Permit → |
| Belgrade | $45 up to $500, plus 6% of the balance of the project costVerified | Electrical Permit → |
| Billings | $130.00Verified | Electrical Permit → |
| Bozeman | Determined based on contractor valuation of the project, subject to Building Division approval of the valuation, applied against Table CVerified | Electric Only Permit → |
| Butte-Silver Bow | Set by the State of Montana Building Codes Program, not by Butte-Silver BowVerified | Electrical Permit → |
| Choteau | See city page for the current Residential Building Permit (New Construction / Addition / Alteration) fee | Residential Building Permit (New Construction / Addition / Alteration) → |
| City of Deer Lodge | $200Verified | Electrical Permit → |
| Colstrip | See city page for the current Residential Building Permit (New Construction / Addition / Alteration / Repair / Move) fee | Residential Building Permit (New Construction / Addition / Alteration / Repair / Move) → |
| Columbia Falls | $200.00Verified | Electrical Permit → |
| Conrad | See city page for the current Zoning and Building Permit (New Construction / Addition / Alteration / Repair) fee | Zoning and Building Permit (New Construction / Addition / Alteration / Repair) → |
| Cut Bank | $23.50 (subject to the $100.00 minimum permit fee)Verifiedvia Residential Building Permit (New Construction / Addition / Alteration) | Residential Building Permit (New Construction / Addition / Alteration) → |
| Darby | $45 for the first $500 plus 6.0% of the balance of construction valueVerified | Electrical Permit → |
| East Helena | $200Verified | Electrical Permit (State-Issued) → |
| Forsyth | See city page for the current Residential Building Permit (New Construction / Addition / Alteration) fee | Residential Building Permit (New Construction / Addition / Alteration) → |
| Glasgow | See city page for the current Residential Building Permit (New Construction / Addition / Alteration) fee | Residential Building Permit (New Construction / Addition / Alteration) → |
| Great Falls | $34.39Verified | Electrical Permit → |
| Hamilton | $45 for the first $500 plus 6.0% of the balance of construction costVerified | Electrical Permit → |
| Hardin | See city page for the current Residential Building Permit (New Construction / Addition / Alteration / Re-Roof) fee | Residential Building Permit (New Construction / Addition / Alteration / Re-Roof) → |
| Havre | $200Verified | Residential Electrical Permit → |
| Helena | $35.00Verified | Electrical Permit → |
| Kalispell | $200.00Verified | Electrical Permit → |
| Laurel | $200Verified | Residential Electrical Permit (State-Issued) → |
| Lewistown | See city page for the current Residential Building Permit (New Construction / Additions) fee | Residential Building Permit (New Construction / Additions) → |
| Libby | $24Verifiedvia Residential Building Permit (New Construction / Addition / Alteration / Repair) | Residential Building Permit (New Construction / Addition / Alteration / Repair) → |
| Livingston | $200Verified | Electrical Permit (State-Issued) → |
| Manhattan | See city page for the current Electrical Permit fee | Electrical Permit → |
| Miles City | Set by City of Miles City fee schedule adopted by council resolution under City Code § 5-4; specific dollar-valuation table not independently locatable as a standalone published document as of this reviewVerified | Residential Electrical Permit → |
| Missoula | $361.00Verified | Residential Electrical Permit → |
| Missoula County (Unincorporated) | $378.00Verified | Electrical Permit (ME) → |
| Polson | $220.00Verified | Electrical Permit → |
| Red Lodge | See city page for the current Residential Building Permit (New Construction / Addition / Alteration) fee | Residential Building Permit (New Construction / Addition / Alteration) → |
| Ronan | $35.00 for up to $1,999Verifiedvia Building Permit (New Construction / Addition / Alteration / Repair) | Building Permit (New Construction / Addition / Alteration / Repair) → |
| Shelby | $23.50Verifiedvia Building Permit (New Construction / Addition / Structural Alteration) | Building Permit (New Construction / Addition / Structural Alteration) → |
| Sidney | $200Verified | Electrical Permit → |
| Stevensville | $200.00Verified | Electrical Permit → |
| Townsend | $200Verified | Electrical Permit (State-Issued) → |
| Troy | $24Verifiedvia Residential Building Permit (New Construction / Addition / Alteration / Repair) | Residential Building Permit (New Construction / Addition / Alteration / Repair) → |
| Unincorporated Yellowstone County | $45Verified | Solar Panel Permit → |
| West Yellowstone | See city page for the current Residential Building Permit (New Construction / Addition / Alteration / Repair) fee | Residential Building Permit (New Construction / Addition / Alteration / Repair) → |
| Whitefish | Based on a percentage of the estimated project cost/valuation, consistent with the City's general building-permit valuation-based fee methodology; a deposit is required at time of permit submittalVerified | Electrical Permit (Trade Permit) → |