HVAC Contractor Permit Requirements in Louisville, KY

Complete permit and license guide for starting a hvac contractor in Louisville, Jefferson County, Kentucky.

Updated 2026-03-15 6 stops $400–$1,500 est. 4–10 weeks to obtain all licenses
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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 Kentucky

2 stops

  1. Kentucky Department of Revenue — Sales and Use Tax Permit

    Required for all businesses selling tangible personal property or certain services in Kentucky. Kentucky charges a flat 6% state sales tax with no local sales taxes (most transactions). Certain services including telecommunications, digital products, and some repair services are also taxable. Register online with the Kentucky Department of Revenue.

    Official government source

    FreeImmediate (online via Kentucky One Stop Business Portal)

  2. EPA Section 608 Certification (for refrigerant handling)

    Federal law requires that any technician who purchases or handles refrigerants must be certified under EPA Section 608. Certification is required for all work on equipment that uses refrigerants (air conditioners, heat pumps, refrigeration systems).

    Official government source

    $20–$100 (exam)1–2 days

City of Louisville / Jefferson County

3 stops

  1. Kentucky Department of Housing, Buildings and Construction — HVAC Contractor License

    HVAC contractors in Kentucky must be licensed through the Kentucky Department of Housing, Buildings and Construction. EPA Section 608 certification is required for refrigerant handling.

    Official government source

    $100–$250 (initial)4–8 weeks

  2. Louisville Metro Revenue Commission — Business License

    Louisville (Louisville Metro / Jefferson County) requires an Occupational License for all businesses. The Revenue Commission processes license applications and collections. 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. Jefferson County / Louisville Mechanical Permit (per project)

    A mechanical permit must be obtained from the local building department for each HVAC installation, replacement, or major repair. A final inspection is required upon completion.

    Official government source

    $75–$500 per project1–5 business days

Terminus

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

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Official Sources

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