HVAC Contractor Permit Requirements in Green Bay, WI

Complete permit and license guide for starting a hvac contractor in Green Bay, Brown County, Wisconsin.

Verified 2026-09-03 4 stops $550–$1,800 est. 7–12 weeks to obtain all licenses
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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

2 stops
  1. EPA Section 608 Technician Certification

    Federal law requires all HVAC technicians who purchase or handle refrigerants to be certified under EPA Section 608 of the Clean Air Act. Certification is available in Type I (small appliances), Type II (high-pressure), Type III (low-pressure), and Universal categories. Certification is obtained through an EPA-approved testing organization such as ESCO Institute or NATE.

    Official government source

    $20–$60 (exam fee)1–2 weeks (exam scheduling)

  2. 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 Wisconsin

1 stop
  1. Wisconsin Department of Safety and Professional Services - HVAC Contractor Registration

    A business installing or servicing HVAC equipment in Wisconsin must hold an HVAC Contractor registration from DSPS (Wis. Admin. Code SPS 305.70). The registration is applied for by the business owner, a partner or a corporate officer, and there is no state examination for the Contractor registration itself. A separate HVAC Qualifier credential exists for individuals.

    Official government source

    $160 HVAC Contractor credential fee, renewing every 4 years from the date of issuance ($200 reinstatement fee). The individual HVAC Qualifier credential is $60 on the same 4-year cycle - DSPS Trades Renewal Dates and Fees.Not published by DSPS - initial applications are filed at license.wi.gov.

City of Green Bay / Brown County

1 stop
  1. City of Green Bay - Mechanical (HVAC) Permit

    Green Bay requires a mechanical (HVAC) permit for HVAC installation, issued through the City's Department of Community & Economic Development building inspection function under Municipal Code Sec. 8-478. There is no separate city HVAC contractor registration - HVAC contractors are registered at the state level by Wisconsin DSPS.

    Official government source

    City of Green Bay Fee Schedule, Sec. 8-478. Commercial, educational, institutional and industrial: $0.09 per sq ft for ducted or hydronic systems, $0.05 per sq ft for ductless unit-heater systems, $100.00 per heating unit replacement, $100.00 per air conditioning addition or replacement. One- and two-family residential: $0.05 per sq ft, $75.00 heating unit replacement, $75.00 per air conditioning unit. A commercial HVAC/mechanical systems plan review is $125.00.Not published - confirm current review times with the City of Green Bay Department of Community & Economic Development.

Terminus

Open for business — est. $550–$1,800 · 7–12 weeks to obtain all licenses

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