HVAC Contractor Permit Requirements in Missoula, MT

Complete permit and license guide for starting a hvac contractor in Missoula, Missoula County, Montana.

Verified 2026-08-27 6 stops $400–$1,500 est. 4–10 weeks
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Not legal advice. Requirements may change — always verify with your local government authority before applying. Key agencies and fees on this page were re-checked against official government sources on .

Federal — start here

1 stop

  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC or corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

State of Montana

2 stops

  1. Montana — No Sales Tax

    Montana has no state or local sales tax. Businesses do not need a sales tax permit. However, businesses must register with the Montana Department of Revenue for applicable business taxes (e.g., withholding, corporate income tax if applicable).

    Official government source

    Free (business registration)Immediate (online via TransAction Portal)

  2. EPA Section 608 Certification (for refrigerants)

    Technicians who purchase, recover, or handle refrigerants must hold EPA Section 608 certification. Required by federal law regardless of state.

    Official government source

    $20–$100 (exam)1–2 days

City of Missoula / Missoula County

3 stops

  1. Montana DLI — Construction Contractor Registration (no state HVAC license)

    Montana does not issue a state HVAC or mechanical contractor license. HVAC businesses with employees must hold a Construction Contractor Registration from the Montana Department of Labor & Industry (solo operators may use an Independent Contractor Exemption Certificate); effective January 1, 2026 the registration becomes a DLI construction contractor license under MCA Title 37, chapter 45. Federal EPA Section 608 certification is required for refrigerant handling, and mechanical permits are pulled from the local building department for each project.

    Official government source

    DLI construction contractor registration/license fee (see erd.dli.mt.gov for the current amount); EPA 608 certification exam cost is separate4–8 weeks

  2. City of Missoula — Business License (Community Planning, Development & Innovation)

    Most businesses operating in Missoula must obtain a city business license through the Community Planning, Development & Innovation (CPDI) department, applied for via the city's online Permit and License Portal. State-licensed professionals (e.g., physicians, attorneys, real estate agents, insurance professionals, nail technicians) are exempt. General business licenses expire May 31 each year regardless of issue date and must be renewed annually.

    Official government source

    $60 per full-time-equivalent employee for a commercial location (minimum $240) or $40/FTE home-based (minimum $160); renewal $27/FTE (minimum $108) — CY2026 fee schedule, Resolution 88871–3 weeks

  3. Missoula County / Missoula Mechanical Permit (per project)

    A mechanical permit must be obtained from the local building department for each HVAC installation or major repair. Inspections are required upon completion.

    Official government source

    Permit fees are valuation-based; use the city's Estimate Permit Fees tool (ci.missoula.mt.us/2966) or contact the Building Division1–5 business days

Terminus

Open for business — est. $400–$1,500 · 4–10 weeks

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