STATE LICENSE
RequiredWisconsin Department of Safety and Profes…
Wis. Stat. § 101.178(2) bars anyone from engaging in the business of installing or servicing heating, ventilating, or air conditioning equipment without registering with DSPS. The HVAC Contractor registration is $160 for a four-year term with no exam and no continuing education; the applicant must be the owner, a partner, or the CEO/chair of the business.
The HVAC Qualifier certification is voluntary under § 101.178(3) and SPS 305.71 — four years of qualifying experience (1,000+ hours a year) or schooling, plus an exam. Its payoff is preemption: a business using a certified qualifier may not be required to hold a local HVAC license, except in municipalities whose approval programs predate November 1, 1993.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
State registration is mandatory everywhere; local HVAC licensing is largely preempted — a municipality may not require local certification from a business using a state-certified HVAC Qualifier, unless its approval requirement predates November 1, 1993 (§ 101.178(3)(c)–(d)). Permits and inspections remain local.
The local offices section below names the exact permit desk for every Wisconsin county on file.
Each row names the issuing authority, cost, timeline, citation, and status behind the requirement — verified against the official source.
Published fees from the issuing authorities, as of October 2026. Local permit fees vary by project and jurisdiction — the basis is stated where a flat number does not exist.
Neither the HVAC Contractor registration nor the Qualifier certification carries continuing education.
Under § 101.178(3)(c) and SPS 305.71(1)(b), a business using a certified qualifier can't be required to get a local HVAC license — unless the locality's program predates Nov. 1, 1993.
Electrical and plumbing work associated with HVAC equipment falls under those trades' licensing, not the HVAC registration.
A practical sequence for a new HVAC contractor in Wisconsin. Actual agency processing times are noted in the ledger above.
Each item names the issuing authority, cycle, and citation.
Statutory consequences with their citations — not estimates, not “commonly cited” guesses.
Engaging in HVAC installation or service without DSPS registration; each installation or service is a separate violation.
A prime contractor who fails to give the owner the statutory lien notice loses the lien remedy.
Inside city limits, the city office listed here issues the permit; the county office serves unincorporated areas. Every office links to its official page.
Every fact in this file was checked against these official sources on October 2026.
Pending verification: Which Wisconsin municipalities still run pre-November 1, 1993 local HVAC approval programs · Whether the City of Milwaukee requires its own contractor license for this trade before issuing permits (city.milwaukee.gov returned 403 to our fetch)
General information, not legal advice. Always confirm requirements, deadlines, and forms with the issuing authority before filing or contracting.
Store licenses, permits, policies, and renewal dates in one place.