STATE LICENSE
ConditionalMassachusetts Division of Occupational Li…
No Massachusetts statute creates an 'HVAC contractor' license. Instead each part of the job maps to a Division of Occupational Licensure trade: gas piping and appliances need a gas fitter license (M.G.L. c. 142, § 3), wiring needs a licensed electrician (c. 141, § 1A), commercial duct and exhaust systems need a sheet metal license (c. 112, §§ 237–238), and refrigeration work needs a refrigeration technician or contractor license (c. 146, § 84). The statute defines 'refrigeration' as work on systems of ten tons capacity or greater, so the refrigeration license reaches large systems, not typical residential split systems.
Technicians who handle refrigerants also need federal EPA Section 608 certification. OCABR's job chart lists central air conditioning as requiring a building permit and a CSL and directs that the work be done by licensed trades, while HIC registration is not required for it. Master sheet metal licenses cost $175 and sheet metal business licenses $225; a refrigeration technician application is $75.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
All trade licenses are statewide; local building, gas, and wiring inspectors issue permits and inspect. Municipalities that adopt DOER's stretch or specialized energy codes (225 CMR 22.00/23.00) may impose stricter heating and cooling requirements.
The local offices section below names the exact permit desk for every Massachusetts 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.
Chapter 146 defines refrigeration as work on refrigerant systems of ten tons capacity or greater; smaller systems fall outside that license, though EPA 608 and the gas and electrical licenses still apply.
The c. 112, § 237 definition covers commercial duct and air exhaust systems, commercial kitchen hoods, bathroom exhaust, and air balancing — but excludes work done by licensed pipefitters, oil burner technicians, refrigeration technicians, plumbers, or gas fitters.
OCABR's general-guidance chart lists central air conditioning as requiring a CSL and building permit, not HIC registration — confirm with the building official.
A practical sequence for a new HVAC contractor in Massachusetts. 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.
Practicing or holding out as licensed to practice sheet metal work without a license.
Engaging in work defined in c. 146, § 81 without a license.
Working as a gas fitter without a license.
Inside city limits, the city office listed here issues the permit; the county office serves unincorporated areas. Every office links to its official page.
| County · City | Permit office | Portal |
|---|---|---|
| Hampden County Springfield (consolidated gov.) | City of Springfield Department of Code Enforcement — Building Division ↗ | Springfield Building Permit Lookups (OpenGov) ↗ |
| Suffolk County Boston (consolidated gov.) | City of Boston Inspectional Services Department (ISD) ↗ | ISD Online Permits and Licenses ↗ |
Every fact in this file was checked against these official sources on October 2026.
Pending verification: Whether residential HVAC ductwork requires a sheet metal license — the § 237 definition names commercial duct systems, but the restricted license scope references residential dwellings · Oil burner technician licensing for oil-fired heating equipment (not researched) · Refrigeration contractor license fee (an older form lists $150; current page not retrieved) · OCABR's HIC/CSL/permit job chart is labeled 'general guidance only'; the building official decides whether a specific job needs a permit or CSL
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.