HVAC Contractor

License Information

Per Wis. Admin. Code § SPS 305.70, no person, entity or business may engage or offer to engage in installing or servicing heating, ventilating or air conditioning equipment unless the person, entity or business holds a registration issued by the Department as a registered HVAC Contractor.

A person, entity or business is not required to hold a registration as a registered HVAC Contractor for the following:

  • To service existing heating, ventilating or air conditioning equipment within facilities or properties owned by the person, entity or business. for electrical or plumbing work associated with the installation or servicing of HVAC equipment or systems;
  • To install or service heating, ventilating, air conditioning, or refrigeration equipment within a dwelling owned by the person, entity, or business and in which the person, entity, or business resides or will reside;
  • For electrical or plumbing work associated with the installation or servicing of the HVAC equipment or systems.

Application for License

3121Application for HVAC Contractor Registration
3073​Trades​ Payment Form

Reinstate an HVAC Contractor Registration that has been Expired more than 4 Years

Submit an application, supporting documentation and fee:

  • Application for HVAC Contractor Registration (Form #3121)
  • $200.00 total fee ($15.00 application fee, $160.00 credential fee, and $25.00 late renewal fee)

Renewal Information 


  • FEE (See Renewal Dates and Fees)

Renewal Methods

Department of Safety and Professional Services

Trades Credentialing Unit
PO Box 78780
Milwaukee, WI  53293-0780

If you have questions regarding your renewal, please email DSPSCredTrades@wisconsin.gov.

When mailing your renewal, please allow up to 21 calendar days [per Wis. Admin. Code SPS 305.04 (1)] from the date your payment is processed to receive an update regarding your renewal.

Getting Certified to Work with Lead Based Paint

Training and certification are required for professionals who offer or conduct regulated lead-based paint activities in pre-1978 housing and child-occupied facilities. These activities include:

  • Abatement of Lead Hazards
  • Lead Testing, Inspection, and Risk Assessment
  • Most paint-disturbing renovation work (for example, replacing windows, scraping paint prior to re-painting)
  • Post renovation and post-abatement clearance (including dust wipe sampling to measure lead dust left behind)

By getting certified and working safely, you protect your own and others' health, and show professional responsibility. For more information about certification, visit the Wisconsin Department of Health Services​ website.​