HVAC contractor licensing in Connecticut
Who licenses heating and cooling contractors in Connecticut, what the classes mean, and how to check one before you sign.
Statewide
Who licenses
HVAC contractors
—
Active licenses
in the public registry
2026Q4.2
Data version
updated monthly
Who licenses HVAC contractors
Connecticut Department of Consumer Protection, Occupational and Professional Licensing (Heating, Piping, Cooling and Sheet Metal Work Board) licenses heating and air conditioning contractors across Connecticut. Relevant classes: S-1/S-2 unlimited heating, piping and cooling; S-3/S-4 limited heating; D-1/D-2 unlimited warm air, AC and refrigeration; D-3/D-4 limited.
How to check a contractor
- Find the license number on the quote, the truck or the website.
- Look it up in the official registry and confirm the name, class and expiry match.
- Ask for proof of liability insurance and, where required, a bond.
Sources
- Connecticut Department of Consumer Protection, Occupational and Professional Licensing (Heating, Piping, Cooling and Sheet Metal Work Board) — https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx
Second opinion
Get one fair quote from a licensed local pro
Tell us the job and when suits you. We confirm by phone or text, then pass your request to one licensed contractor who covers your ZIP. Nobody else gets your number.
- We confirm the job before anyone calls you
- One contractor, never a bidding list
- License checked with the state
- Free for homeowners