STATE LICENSE
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DLI states plainly that no state license is required for mechanical contractors. What the state does require is a bond: under Minn. Stat. § 326B.197, contractors performing gas, heating, ventilation, cooling, air conditioning, fuel burning, or refrigeration work give a $25,000 bond to the state for the benefit of people harmed by violations of the State Mechanical Code. The filing costs $100 and lasts two years, and the state bond replaces bonds to political subdivisions.
The real licensing happens in cities. Minneapolis requires a city gas fitter license (with the $25,000 state bond) and competency cards for masters and journeymen in gas fitting, refrigeration, warm air/ventilation, and steam and hot water work; St. Paul runs its own certificates of competency. Wiring to HVAC units remains licensed electrical work, and technicians handling refrigerants need EPA Section 608 certification.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
The state sets only a bond. DLI says mechanical contractors must also comply with local licensing: Minneapolis licenses gas fitters (requiring the $25,000 state bond and a Minneapolis competency card) and requires competency cards for mechanical-trade masters and journeymen; St. Paul issues its own certificates of competency and accepts Minneapolis master cards for some reciprocal licenses.
The local offices section below names the exact permit desk for every Minnesota 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.
Contractors who have given a bond under § 326B.197 are exempt from Minnesota's separate construction contractor registration (§ 326B.701).
The § 326B.197 bond is given in lieu of all other bonds to political subdivisions — but cities may still require their own licenses and competency cards.
Mechanical contractors are exempt from the residential building contractor license (§ 326B.805, subd. 6).
A practical sequence for a new HVAC contractor in Minnesota. 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.
DLI issues orders against contractors doing HVAC work without the required bond filing.
Violating a law under DLI's jurisdiction is a misdemeanor unless another statute provides otherwise.
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 Minnesota cities beyond Minneapolis and St. Paul license mechanical contractors or require competency cards · Minneapolis and St. Paul license and competency-card fees · No 2024–2026 legislation creating a statewide mechanical license was found; absence was not exhaustively confirmed against every session law
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.