Quick answer: Electricians, plumbers, gas fitters, sheet metal workers, and refrigeration technicians must hold a state trade license. Anyone supervising permitted structural work on a home needs a Construction Supervisor License (CSL). And most contractors who remodel an existing owner-occupied 1-4 unit home must also carry a Home Improvement Contractor (HIC) registration. Trades like roofing, painting, carpentry, landscaping, handyman work, and cleaning have no separate state trade license, but residential remodeling in those trades still requires HIC registration (and a CSL when the work is structural or needs a building permit).
Massachusetts regulates construction through a mix of state trade licenses, a Construction Supervisor License for structural work, and a separate Home Improvement Contractor registration for residential remodeling.
Which trades need a license in Massachusetts?
| Trade | State license required? | Licensing body |
|---|---|---|
| Plumber | State license required | Plumbing is a state-licensed trade. The Board of State Examiners of Plumbers and Gas Fitters registers apprentices and examines and licenses journeyman and master plumbers. You typically register as an apprentice, work under a licensed plumber, complete required classroom theory plus several years of experience, and pass the journeyman exam; a master plumber license requires additional experience and the master exam. Only a licensed plumber may perform plumbing work. |
| Electrician | State license required | Electrical work is state-licensed by the Board of State Examiners of Electricians. Only a licensed master or journeyman electrician may be hired to perform electrical work at a home or business. The Board issues master (A), journeyman (B), systems contractor (C), and systems technician (D) licenses. |
| HVAC / Sheet Metal & Refrigeration | State license(s) required (component-based) | Massachusetts has no single "HVAC contractor" license; the work is split across separate state licenses. Ductwork and air-exhaust systems must be installed by a licensed sheet metal worker (Board of Examiners of Sheet Metal Workers) - including residential fans and associated ductwork. Refrigeration and air-conditioning cooling systems require a Refrigeration Technician license issued by the Office of Public Safety and Inspections. Any gas piping connections must be made by a licensed gas fitter. |
| General Contractor | No single GC license; CSL + HIC apply | Massachusetts does not issue a general "general contractor" license. Instead, a general contractor building or structurally altering a home usually needs a Construction Supervisor License (CSL) from the Board of Building Regulations and Standards to pull permits and supervise work regulated by the state building code (780 CMR), and a Home Improvement Contractor (HIC) registration to contract residential remodeling on existing owner-occupied 1-4 unit homes. |
| Roofer | HIC required; CSL if structural | There is no separate state "roofer" license. To reroof an existing owner-occupied 1-4 unit home you must register as a Home Improvement Contractor (HIC). Roofing work that requires a building permit or affects structure falls under the Construction Supervisor License requirement - Massachusetts offers an unrestricted CSL and restricted specialty CSLs, including a "roof covering" specialty. |
| Painter | HIC for residential remodeling | Painting is not a separately licensed state trade. A painter doing standalone work generally needs no state trade license, but painting performed as part of home improvement on an existing owner-occupied 1-4 unit residence requires Home Improvement Contractor (HIC) registration. No Construction Supervisor License is needed unless the work involves structural elements or a building permit. |
| Carpenter | HIC required; CSL if structural | Massachusetts has no standalone "carpenter" license. Carpentry as part of residential remodeling on an existing owner-occupied 1-4 unit home requires Home Improvement Contractor (HIC) registration. When carpentry involves structural work regulated by the building code and requiring a permit (framing, additions, structural alterations), a Construction Supervisor License (CSL) is also required. |
| Landscaper | No state license | General landscaping (planting, lawn care, grounds maintenance) has no state trade license in Massachusetts. Some hardscaping or structural exterior improvements tied to home improvement of an existing owner-occupied 1-4 unit residence can fall under Home Improvement Contractor (HIC) registration, and permitted structural work would trigger the Construction Supervisor License. Applying pesticides commercially requires a separate state pesticide license. |
| Handyman | HIC for residential work | "Handyman" is not a licensed trade in Massachusetts, but the type of work controls the rules. Home repair and improvement performed on an existing owner-occupied 1-4 unit home is home improvement contracting and requires Home Improvement Contractor (HIC) registration. Any structural work needing a building permit requires a Construction Supervisor License, and any electrical, plumbing, gas, sheet metal, or refrigeration work must be done by the corresponding licensed tradesperson. |
| Cleaner | No state license | Residential and commercial cleaning services are not a licensed construction trade in Massachusetts and require no state trade license, CSL, or HIC registration. General business registration and, where applicable, local business permits may still apply. |
Trade licenses (electrical, plumbing/gas, sheet metal, refrigeration), the Construction Supervisor License, and Home Improvement Contractor registration are three separate systems - a single project may require more than one.
CSL vs. HIC: the two-part framework for home construction
Massachusetts splits oversight of residential construction into two distinct programs that are easy to confuse. The Construction Supervisor License (CSL), administered by the Board of Building Regulations and Standards under the Office of Public Safety and Inspections, governs the technical, code-compliance side: an individual must hold a CSL to supervise construction, reconstruction, alteration, repair, removal, or demolition of work regulated by the state building code (780 CMR) for one- and two-family dwellings and for buildings containing less than 35,000 cubic feet of enclosed space. The Home Improvement Contractor (HIC) registration, administered by the Office of Consumer Affairs and Business Regulation, is a consumer-protection registration required to contract remodeling work on existing owner-occupied residences of one to four units. Many residential projects need both.
State-licensed trades: electrical, plumbing & gas, sheet metal, refrigeration
Certain trades are licensed directly by state boards and cannot be performed by an unlicensed person. Electricians are licensed by the Board of State Examiners of Electricians - only a licensed master or journeyman electrician may perform electrical work. Plumbers and gas fitters are licensed by the Board of State Examiners of Plumbers and Gas Fitters. For HVAC, sheet metal workers are licensed by the Board of Examiners of Sheet Metal Workers - duct and air-exhaust systems, including residential fans and ductwork, must be installed by a licensed sheet metal worker - and refrigeration technicians are licensed by the Office of Public Safety and Inspections. These trade licenses are separate from, and in addition to, any CSL or HIC requirement.
HIC registration for residential remodeling
Any contractor, subcontractor, partnership, or corporation that solicits, bids on, or performs contracting work on an existing, owner-occupied residential property with one to four units must be registered as a Home Improvement Contractor. Registration is completed online through the MA Contractor Hub, and the program is run by the Office of Consumer Affairs and Business Regulation. Importantly, the law does not cover new construction, buildings with more than four units, or investment, vacation, and secondary properties. Because HIC is about the residential remodeling relationship rather than a specific trade, it applies to general contractors, roofers, carpenters, painters, handymen, and others when they remodel qualifying homes.
Trades with no separate state license
Several common trades have no dedicated Massachusetts state license: roofing, painting, carpentry, general landscaping, handyman work, and cleaning. This does not mean the work is unregulated. For roofing, carpentry, painting, handyman, and similar work on an existing owner-occupied 1-4 unit home, HIC registration is still required, and any work that is structural or requires a building permit triggers the Construction Supervisor License requirement (including restricted specialty CSLs such as roof covering, or window and siding). Cleaning services require no trade license, CSL, or HIC.
Local permits and homeowner rules still apply
State licensing is only part of the picture. Building permits are issued at the municipal level, and you should always confirm requirements with the building official in the city or town where the project is located, since local rules and permit thresholds vary. Massachusetts also provides a homeowner exemption: a homeowner performing work on their own home for which a building permit is required is exempt from the CSL licensing provisions, but if the homeowner hires people for that work, the homeowner must act as the supervisor.
How to get licensed in Massachusetts
- Identify your trade and work type: decide whether you are doing state-licensed trade work (electrical, plumbing/gas, sheet metal, refrigeration), structural building work, or residential remodeling - each has its own requirement.
- If your trade is state-licensed, apply through the correct board: Board of State Examiners of Electricians; Board of State Examiners of Plumbers and Gas Fitters; Board of Examiners of Sheet Metal Workers; or the Office of Public Safety and Inspections for refrigeration.
- If you will supervise permitted structural work on homes, obtain the Construction Supervisor License (CSL) from the Board of Building Regulations and Standards - choosing an unrestricted CSL or the appropriate restricted specialty.
- If you will remodel existing owner-occupied 1-4 unit homes, register as a Home Improvement Contractor (HIC) online through the MA Contractor Hub with the Office of Consumer Affairs and Business Regulation.
- Before each job, confirm building-permit requirements with the local municipal building official and keep all state licenses and registrations current through their renewal cycles.
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Frequently asked questions
Does Massachusetts have a general contractor license?
No. Massachusetts does not issue an all-purpose general contractor license. Instead, contractors typically need a Construction Supervisor License (CSL) to supervise permitted structural work under the state building code and a Home Improvement Contractor (HIC) registration to remodel existing owner-occupied 1-4 unit homes. Many general contractors hold both.
What is the difference between a CSL and an HIC registration?
The Construction Supervisor License (CSL) is a license to supervise construction work regulated by the state building code (780 CMR) - for example, structural work on one- and two-family homes or buildings under 35,000 cubic feet. The Home Improvement Contractor (HIC) registration is a consumer-protection business registration required to contract remodeling on existing owner-occupied residences of one to four units. They are separate programs run by different agencies, and a project can require both.
Do roofers, painters, and carpenters need a license in Massachusetts?
There is no separate state trade license for roofing, painting, or carpentry. However, when this work is performed on an existing owner-occupied 1-4 unit home, the contractor must hold a Home Improvement Contractor (HIC) registration, and work that is structural or requires a building permit also requires a Construction Supervisor License (CSL).
Who can legally do electrical, plumbing, and HVAC work?
Electrical work must be done by an electrician licensed by the Board of State Examiners of Electricians. Plumbing and gas work must be done by a plumber or gas fitter licensed by the Board of State Examiners of Plumbers and Gas Fitters. HVAC is split: ductwork requires a licensed sheet metal worker, refrigeration/cooling systems require a licensed refrigeration technician, and gas connections require a licensed gas fitter.
Sources: Construction Supervisor Licensing (BBRS / OPSI) - Mass.gov, Home Improvement Contractor Registration and Renewal - Mass.gov, Board of State Examiners of Electricians - Mass.gov, Board of State Examiners of Plumbers and Gas Fitters - Mass.gov, Sheet Metal Workers Licensing - Mass.gov, 2025. Licensing rules change — always confirm current requirements with the relevant state board and your local city before you work.