HVAC Contractor Permit Requirements in Casper, WY

Complete permit and license guide for starting a hvac contractor in Casper, Natrona County, Wyoming.

Updated 2026-03-15 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. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

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 Wyoming

2 stops

  1. Wyoming Department of Revenue — Sales Tax License

    Required for all businesses selling taxable goods or services in Wyoming. Wyoming charges a 4% state sales tax; counties may add up to 2% and optional resort taxes may apply. Register with the Wyoming Department of Revenue online.

    Official government source

    $60 one-time sales/use tax license fee (W.S. § 39-15-106(a))Immediate (online)

  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 Casper / Natrona County

3 stops

  1. Wyoming HVAC Contractor License

    HVAC contractors in Wyoming must hold applicable mechanical trade licenses. EPA Section 608 certification is required for refrigerant handling. Local permits are required for each installation.

    Official government source

    $100–$200 (initial)4–8 weeks

  2. City of Casper City Clerk — Business License

    Casper requires a Business License for regulated businesses within city limits. Contact the City Clerk for requirements specific to your business type. This license must be renewed annually and displayed at your place of business.

    Official government source

    $50–$500/year depending on business type and gross revenues1–3 weeks

  3. Natrona County / Casper 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

    $50–$300 per project1–5 business days

Terminus

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

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Official Sources

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