Wisconsin HVAC license lookup: how to check and get a license
Wisconsin HVAC license lookup: who issues HVAC contractor licenses (DSPS), how to check one online, the license types, and 1,942 plumbing, heating and air-conditioning contractors by county.
Do HVAC contractors need a license in Wisconsin?
| Who licenses them | Wisconsin Department of Safety and Professional Services (DSPS) |
|---|---|
| License types | HVAC Contractor (registration), HVAC Qualifier (voluntary certification) |
| When a license is required | Any business installing or servicing HVAC equipment must register with DSPS, Wis. Stat. 101.178 |
Wisconsin requires HVAC businesses to hold an HVAC Contractor credential (registration, not a competency license); the HVAC Qualifier exam certification is voluntary under state law. Refrigerant work also requires federal EPA Section 608 certification.
How do you look up an HVAC contractor's license in Wisconsin?
- Ask the HVAC contractor for the license number and the exact business name on the license.
- Open the Wisconsin HVAC license lookup run by DSPS.
- Search by license number first. A name search can return several people or companies with similar names.
- Check that the status is active or current, that the license type covers your job, and that the name matches the company on your contract.
- If something doesn't match, ask the HVAC contractor about it before you sign or pay a deposit, or contact DSPS.
What HVAC licenses does Wisconsin issue?
- HVAC Contractor (registration)
- HVAC Qualifier (voluntary certification)
How do you get a HVAC license in Wisconsin?
Licenses are issued by the Wisconsin Department of Safety and Professional Services (DSPS). Requirements such as experience, exams, insurance and fees change, so read the current rules on the official DSPS source before you apply. Already licensed? List your business on Expert Helper to get matched with customers.
How many HVAC contractors are there in Wisconsin?
The Census Bureau counted 1,942 plumbing, heating and air-conditioning contractors with employees in Wisconsin in 2023. The counties with the most:
| Waukesha County | 178 |
|---|---|
| Milwaukee County | 140 |
| Dane County | 128 |
| Outagamie County | 89 |
| Brown County | 86 |
| Racine County | 67 |
| Winnebago County | 56 |
| Marathon County | 54 |
What do Wisconsin homes mean for heating and cooling work?
The median home in Wisconsin was built in 1975, 32% of households rent and 71% of homes are single-family houses. 65% of homes heat with utility gas and 17% with electricity, and 2% with fuel oil.
How do you choose an HVAC contractor in Wisconsin?
- Check the state or local mechanical or HVAC license, and ask whether the technicians hold EPA 608 certification for refrigerant work.
- For a new system, ask for a load calculation (often called Manual J) rather than a size picked from square footage.
- Ask which rebates and tax credits apply to heat pumps and high-efficiency equipment, and whether the contractor files the paperwork.
- Compare quotes on the same equipment model numbers and efficiency ratings (SEER2, HSPF2, AFUE).
- Ask what the labor warranty covers, separately from the manufacturer's parts warranty.
HVAC Contractors in other states
Sources: Wisconsin licensing agency (linked above); US Census Bureau County Business Patterns 2023 and ACS 2023 5-year estimates.