HVAC Contractor Permit Requirements in Hilo, HI

Complete permit and license guide for starting a hvac contractor in Hilo, Hawaii County, Hawaii.

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 Hawaii

2 stops

  1. Hawaii Department of Taxation — General Excise Tax License

    Hawaii does not have a traditional sales tax but requires all businesses to pay a General Excise Tax (GET) on gross income from business activities. The GET rate is 4% (4.5% in Honolulu). All businesses must register for a GET license with the Hawaii Department of Taxation.

    Official government source

    $20 (one-time registration fee)2–4 weeks (by mail) or immediate (in-person)

  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 Hilo / Hawaii County

3 stops

  1. Hawaii Contractors License Board — HVAC Contractor License (C-52)

    HVAC contractors in Hawaii must hold a C-52 Air Conditioning, Ventilating, and Heating Contractor License from the Hawaii Contractors License Board. EPA Section 608 certification required for refrigerants.

    Official government source

    $250–$400 (initial)4–8 weeks

  2. County of Hawaii Finance Department — Business License

    Hilo (Hawaii County) requires a County business registration and applicable permits. Contact the County Finance Department for business license requirements. 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. Hawaii County / Hilo 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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