Massachusetts HVAC license: there isn't one. What replaces it (gas fitter, sheet metal, oil burner and refrigeration licenses) and your first 30 days

Published November 3, 2026 · Statutes, regulations and agency pages checked November 3, 2026

• Free. The full 30-day checklist is on this page. The printable version (PDF, Word or Google Docs) comes by email.
• Deepsel is our product: free estimate, invoice and scheduling software for home-service contractors (scheduling, quotes, invoicing, card payments). The section before the FAQ says where it fits and what it won't do for you.
• Not legal advice. Every rule here links to the statute, regulation or agency page I read on November 3, 2026. Your town's building, gas and wiring inspectors have the last word on permits, and a Massachusetts attorney on the rest.

Massachusetts has no HVAC license. Each part of the job has its own license instead: a gas fitter (or plumber) for anything that burns gas, an oil burner technician certificate for oil, a sheet metal license for ductwork, and a refrigeration license, but only for systems of 10 tons or more.¹²³⁴ The wiring goes to a licensed electrician.⁵ So a house-size heat pump or central AC needs no state license on the refrigerant side, only the federal EPA 608 card,⁶ but it still needs a building permit,⁷ and Mass Save's heat pump rebates only go through installers in its network, which asks for a sheet metal, refrigeration, electrical contractor or plumbing license.⁸

If this page reached you by email, it's because your company is on the state's home improvement contractor (HIC) register. Installers of central heating and air-conditioning don't have to register,⁹ so the registration was your choice, or you sell other home improvement work as well. It doesn't license any HVAC work. It does put you under the home improvement law's contract and advertising rules, which I come back to below.

The confusion is old, and it costs owners money. A Massachusetts owner with a universal EPA card and two years in business posted this in r/HVAC: "Google won't let me advertise until I provide them with a hvac license. I told them Mass doesn't offer that. You can get a plumbing or sheet metal license or commercial refrigeration license."¹⁰ He had the law right. This page covers the weeks after your card shows up: which license each part of the job needs, who in the company has to hold it, what to sub out, permits, Mass Save, a table of common jobs, what crossing the line costs, and a 30-day checklist you can print.

Massachusetts HVAC license requirements: one license per trade

Here's the split. The last column matters as soon as you form an LLC or hire your first tech.

Nobody issues an HVAC contractor license, a mechanical license or an HVAC qualifier. The building code's construction supervisor rule even lists "HVAC and refrigeration equipment" among the trades "licensed by agencies of the Commonwealth,"¹⁷ which adds to the confusion. The agencies license the parts. Nobody licenses the whole.

Who holds the license: you, your company, or both

Every license on that list belongs to a person. A company gets its standing through a licensed person, trade by trade, and each board writes its own rules.

Gas fitting

• "All corporations, LLC's, partnerships, or other such entities that have plumbing or gas fitting employees are required to maintain a business license." "Individuals practicing under their own name or a DBA do not require a business license."¹¹
• The applicant has to be a master gas fitter who is a listed officer of the corporation or a listed manager of the LLC, and the filing with the state has to name gas fitting as one of the company's disciplines. In a partnership, every partner must be a master.¹¹
• The business license is issued to that master and is "only transferable with Board approval." If the master leaves, a new master must apply within 15 days, and the company "may not continue to operate after 60 days" without one.¹¹
• For an LLC or corporation, only that master can pull its gas permits.¹⁸

Sheet metal

• "All business entities performing sheet metal work in Massachusetts must be licensed by the Board," with a master as a corporate officer or the LLC's manager, designated as "Responsible Craftsman." The license costs $225 and needs a certificate of liability insurance.¹⁴¹³
• No entity may advertise sheet metal work, bid it, pull permits for it or let employees do it unless the entity and every employee doing the work hold a license.¹⁹
• Change of craftsman: tell the board within 60 days. After that, with no master willing to take it on, "the business must cease sheet metal work operations, bidding, and permitting."¹³
• A master may also work as an individual. Two journeypersons can't go into business as partners.⁴²⁰

Refrigeration, oil and electrical

The refrigeration contractor license is a master's personal license, and refrigeration apprentices must be employed by a Massachusetts refrigeration contractor.¹⁵¹ The oil burner certificate is personal too, and I found no company-level oil license. Electrical work sold by your company needs an A1 electrical business license with a master as licensee of record, so most HVAC companies sub it out.¹⁶

Two things I looked for and didn't find. No board sets an ownership share: the gas and sheet metal rules want the master as an officer, an LLC manager or a partner, and say nothing about a percentage.¹¹¹³ And neither the gas rules nor the sheet metal statute stops one master from standing behind two companies.¹¹¹⁹ That's "none found," not "allowed."

If someone asks you to be their master

If a friend's HVAC company asks you to put your master gas fitter or master sheet metal license behind its business license, know what you're signing. On the sheet metal side the Responsible Craftsman "shall be personally responsible for the activities of the business," including that every person doing its sheet metal work is licensed and every permit is pulled.¹³ On the gas side, "discipline against a licensee of record shall be considered discipline against the business," and the other way round.¹¹ Aiding unlicensed sheet metal work is grounds for discipline in its own right.²¹ A later article covers the rest: what to charge for it and what to put in writing.

What each license covers, and the gray areas

The Massachusetts refrigeration license: only from 10 tons

The statute licenses "refrigeration," defined as work on "any refrigerant containing part of any refrigerant system of a ten ton capacity, or greater."¹ The bureau's regulation defines a refrigeration system as "a combination of interconnected parts forming a closed circuit" and a ton as 12,000 BTU an hour.²² So the line runs per system. A 3-ton split or a 5-ton package unit sits outside it.

The bureau's own application page words it differently: the license "is required for anyone who performs refrigeration work having a capacity over 10 tons in the aggregate."²³ "Aggregate" could be read to add up several small systems in one building. The statute and regulation don't say that, but if you're bidding a building whose rooftop units add up to more than 10 tons, call the bureau at (617) 727-3200 before you sign.

The license takes years, and the road got longer on November 9, 2026. Journeyman applications dated from that day need a 450-hour approved course, EPA 608 Universal and 6,000 hours as a licensed refrigeration apprentice. Hardship waivers for the old routes stop on May 10, 2027.²⁴²⁵ The master (refrigeration contractor) license adds 2,000 hours as a Massachusetts journeyman and 100 hours of education.²⁴

The Massachusetts sheet metal license: ductwork in houses too

The statute defines sheet metal work as "all commercial duct or air exhaust systems."²⁶ Don't read that as a pass for houses. The board's regulation describes the scope as "duct or air exhaust systems" and "ductwork installed during new or remodeling construction," with no "commercial,"²⁰ and its fact sheet says only a licensed master or journeyperson "can perform sheet metal work at your home or business."⁴ The restricted J-2 and M-2 licenses exist for "residential jobs and non-residential jobs which are under three stories and up to and including 10,000 square feet."²⁰ The board counts a new bathroom fan and its duct as sheet metal work too.²⁷

Three details a service company needs:

• Preventive maintenance needs no sheet metal license. Inspection, cleaning and oiling are fine, but "any reinstallation, handling, dismantling, alteration or repair" during the visit is licensed work with a permit.²⁷
• Advertising ductwork without a license is unlicensed practice in itself: "Advertising or representation by unauthorized individuals and entities shall be considered unlicensed practice."²⁰
• A ductless mini-split has no ducts, so the sheet metal license doesn't come into it.

The road: a restricted journeyperson license takes three years as an apprentice and 450 hours of theory, unrestricted takes five years and 750 hours, and a master adds a 40-hour class and an exam.⁴

Gas: the gas fitter answers for the appliance and its vent

Gas fitting covers the piping past the meter, "including the connection therewith and testing of gas fixtures, ranges, refrigerators, stoves, water heaters, house heating boilers, and any other gas using appliances," and "the maintenance in good and safe condition of said systems."² The board reads it wide. Its policy on venting says "the complete installation, alteration, replacement or repair of gas fueled equipment requires that the licensed plumber or gas fitter provide for the proper venting," and the licensee "must be present for the final inspection." Only a licensee, or "an appropriately trained person under the control and supervision" of one, may do that work. For appliances under 400,000 BTU an hour, qualified installers may put in the vent when a supervising licensee holds the gas permit.²⁸

On a service call, adjusting gas appliance controls needs no permit "when said adjustment does not require any changes to the connection to the gas supply or associated piping."¹⁸ Anything that changes the connection or the piping is permit work for a licensee. In an emergency, a licensee may install or turn on a gas appliance before the permit if the work is tested, "the licensee and gas supplier (if applicable) are satisfied," and the inspector is told by the next working day.¹⁸

The license: a journeyman gas fitter needs two years as an apprentice and 150 hours of theory, and a master needs a year as a journeyman and an exam.¹²

Massachusetts oil burner license

The Department of Fire Services certificate "allows the holder to service, install and repair oil burners that burn fuel oil and associated equipment." It costs $75, takes a written exam with no experience requirement, and lasts two years.³ It also lets the holder "connect or disconnect for the purpose of repair or replacement" the burner's devices and controls, work that would otherwise belong to an electrician.²⁹ Every install or alteration needs the fire department's Form 1 permit, and the form reads: "Certificate of Competency required, no other license acceptable, plumbing, electrical, etc."³⁰ In oil country it's the quickest license on this page to get.

The circuit, the disconnect and the thermostat wire

Massachusetts licenses the installing of "wires, conduits, apparatus, devices, fixtures, or other appliances for carrying or using electricity for light, heat, power."⁵ The exceptions cover utilities, elevators, telecom and the like, and none covers HVAC installers,³¹ so the new circuit, the disconnect and the whip to the condenser belong to an electrician, with notice to the inspector of wires.³² Thermostat wire is the gray one. The electricians' board says "There is no generic exception for 'low voltage' wiring" and tells installers to check with the local inspector of wires.¹⁶ Oil burner controls are the one written exception.²⁹

Boilers, hydronic piping and condensate

A gas boiler is gas fitting and an oil boiler is oil burner work. The heating loop itself is a gap. Pipefitting is licensed only for heating systems "having a rating greater than 700,000 British Thermal Units," and it excludes "boilers and plumbing,"¹ while plumbing covers drainage, venting and the water-supply system.² I found no state license for the closed hot-water loop of a house boiler, so ask the local plumbing inspector before you assume it's open. The fill line, a humidifier feed and a condensate line into the house drain all connect to systems the plumbing definition names, so I'd give them to a plumber. A condensate line to a pump or to daylight I'd treat as part of the equipment install.

Federal rules: EPA 608, A2L refrigerants and lead-safe work

EPA 608. Anyone "who could be reasonably expected to violate the integrity of the refrigerant circuit" must pass a certification exam, and an uncertified apprentice may do that work only if "closely and continually supervised by a certified technician."⁶ Supply houses may sell refrigerant only to a certified technician, or to a company that employs one and shows proof.³³³⁴ The cards don't expire.³⁵ In Massachusetts this card is the only credential most house-size AC and heat pump work calls for, so keep a copy of every tech's.

A2L refrigerants (R-454B, R-32). The 10th edition building code adopted the 2021 International Mechanical Code, which "does not facilitate A2L refrigerants." The Board of Building Regulations and Standards advised on November 12, 2024 that installations following ASHRAE 15-2022 and UL/CSA 60335-2-40-2022 are "readily approvable by a reviewing building official."³⁶ Bring the manufacturer's installation instructions to the inspection. On the federal side, EPA's rule of May 26, 2026 lets residential and light commercial AC and heat pump equipment made or imported before January 1, 2025 still be installed.³⁷

Lead-safe work in homes built before 1978. EPA's lead-safe firm certification doesn't apply in Massachusetts; the state runs its own program.³⁸ If a chase, a register opening or a line-set path disturbs "greater than six square feet of painted surface per room" inside, or more than 20 square feet outside, your company needs the Department of Labor Standards' lead-safe renovation contractor license ($375) and a certified supervisor on site.³⁹ Six square feet is a patch about two feet by three.

Apprentices, helpers and who can work alone

• Sheet metal: apprentices get a board license before they start and work under "direct, on-site supervision" of a master or a journeyperson employed by a master, one apprentice per supervisor on site.⁴⁰²⁰ Journeypersons may work alone, the J-2 within its size limits.²⁰
• Gas: apprentices are licensed by the board and work under direct supervision, which the board defines as "on-site and present during the conducted work," by a master or journeyman, in the employ of a master.⁴¹ Pay them on a W-2: the board treats a 1099 as evidence the apprentice is acting as an independent contractor, and the master risks discipline for "aiding and abetting unlicensed practice."¹¹ I found no numeric ratio.
• Oil: an apprentice certificate costs $40 with no exam, and the apprentice works "only under the direct supervision" of a certified technician.³⁴²
• Refrigeration of 10 tons or more: apprentices are licensed with the Office of Public Safety and Inspections, registered with the Division of Apprentice Standards and employed by a refrigeration contractor; a licensed technician can supervise them.¹⁵
• Refrigerant on house systems: anyone who opens the circuit needs a 608 card, or close and continual supervision by someone who has one.⁶
• Helpers: a helper who carries equipment, sets pads and cleans up needs no registration that I found. The sheet metal rules say moving materials to the site isn't licensed work.²⁰

Where your work stops: what to sub out

If your company holds only EPA cards, here's the split on a typical job. Cross off any line whose license you or an employee hold.

• Gas: the gas line, the connection to the appliance, testing and the vent. A licensed gas fitter or plumber pulls the gas permit and attends the final inspection.²⁸¹⁸
• Electrical: the new circuit, the breaker, the disconnect and the whip.⁵
• Ducts: new or altered ductwork, plenums, registers and dampers, on a sheet metal permit.⁴⁴³
• Plumbing: a boiler fill, a humidifier feed, a backflow device, a condensate tie-in to the drain.²
• Oil: the burner, its controls and the fire department permit.³⁰
• Building work: cutting or notching joists, studs or rafters means a construction supervisor has to be in charge of the permit.⁷¹⁷ On an owner-occupied home with one to four units, carpentry, drywall or insulation sold as its own job is home improvement work that needs the HIC registration, which you already hold. The rest of the HIC rules are on my MA HIC license page.

What stays yours with a 608 card alone: the refrigerant side of systems under 10 tons (setting the condenser, running and brazing the line set, the pressure test, evacuation and charge), service and diagnosis on that circuit, setting equipment, filters, cleaning and maintenance, and the building permit for an install that needs no structural cutting.¹⁷²⁷

Massachusetts HVAC permits: who pulls them and who inspects

The state writes the codes, and your city or town issues the permits and inspects.¹⁸⁴⁴ One heat pump job in a house can take four permits.

• Building permit. The residential code makes it unlawful "to install or alter any equipment" it regulates without a permit, and its list of exempt work has no HVAC item.⁴⁴ In January 2026 the Division of Occupational Licensure applied that to ductless mini-splits: "a Ductless mini-split system requires a permit." The same guidance says a construction supervisor license "is not required for the most basic of installations but is required if cutting or notching of building elements is required."⁷ It covers one- and two-family homes, and the building official still decides each case. The application asks for your HIC number on residential contracting and proof of workers' comp.⁴⁴
• Sheet metal permit from the local building inspector, before any sheet metal work is "installed, altered, removed, replaced, or repaired." It's issued only to licensed sheet metal workers who carry liability insurance "including completed operations coverage," or a bond.⁴⁴⁵⁴³
• Gas permit from the local gas inspector, issued only to licensed individuals, and for an LLC or corporation only to its master of record.¹⁸
• Electrical permit, plus notice to the inspector of wires within five days of starting.³²
• Oil: the fire department's Form 1 permit for any oil burner install or alteration.³⁰

Like-for-like change-outs. I found no exemption for swapping an AC, a furnace or a boiler. The state's mini-split reasoning (installing equipment needs a permit) fits a straight swap too, and a gas appliance can't be "replaced" until the gas permit is issued.⁷¹⁸ Some building departments may handle a swap differently, so ask each town once and write the answer down.

Homeowners. A homeowner may pull their own building permit without a construction supervisor license, but if they hire people for the work, "such homeowner shall act as supervisor."¹⁷ Homeowners may do their own sheet metal work in their own owner-occupied one- or two-family home.²⁰ Gas permits go only to licensed people, so there's no homeowner route on the gas side.¹⁸ If a customer offers to pull the permit so you can skip it, the building permit is the one that matters: holding it makes them the supervisor of your crew, and the gas permit they can't hold at all.

Boston and other towns. Boston's Inspectional Services issues gas and sheet metal permits to "licensed contractors only."⁴⁶⁴⁷ I found no city HVAC license in Boston, and I didn't check all 351 cities and towns. Building departments differ most on heat pump permits, so call before your first job in a new town.

Mass Save Heat Pump Installer Network: the license list that decides rebates

For many heat pump customers the rebate makes the sale, and the rebate needs your company in the Mass Save Heat Pump Installer Network (HPIN). The air-source rebate page says equipment "must be installed by a contractor participating in the Mass Save Heat Pump Installer Network," for installs between January 1 and December 31, 2026.⁴⁸

To join, an authorized company representative submits:⁸

• the signed participation agreement and a W-9;
• "Massachusetts HVAC or Electrical Contractor/Plumbing License (Massachusetts Sheet Metal, Refrigeration, Electrical Contractor, or Plumbing License accepted)";
• a certificate of general liability insurance (the page gives no minimum);
• for air-source and VRF installers, EPA 608 certification and a heat pump manufacturer's installation training certificate;
• within the first year, a manufacturer's cold climate sizing and design training, plus the program's own online courses.

Read the license line twice. There is no HVAC license to send, and a gas fitter license or an oil burner certificate isn't on the accepted list as written. A shop with only EPA cards can install a heat pump legally but can't get the customer the rebate. That one line is the best business reason in Massachusetts to earn a sheet metal license, or to bring in a partner who holds one.

Can I take this job? A table for Massachusetts HVAC contractors

The middle column assumes your company holds EPA 608 cards and no state trade license. "Yes with a permit" means you can do it once the permit is pulled. "Sub it out" means a licensed trade does it, unless you or an employee hold that license.

What happens if you cross the line

Unlicensed trade work

• Sheet metal: a fine of $100 to $1,000 for practicing without a license, a fine set by the board for work without a permit, and board discipline.⁵⁰⁴³ On top of that, boards under the Division of Occupational Licensure can assess civil penalties for unlicensed practice of up to $1,000 for a first violation and $2,500 after that.⁵¹
• Gas: a fine of up to $100 under the plumbing and gas statute,⁵² the same civil penalties, and no final inspection without the licensee present.²⁸
• Refrigeration of 10 tons or more: $10 to $100 for a first offense, and $50 to $500 or six months in the house of correction for a later one.⁵³
• Electrical: $1,000 to $1,500 for a first offense, rising to $2,000 to $2,500 or six months for a third or later one.⁵⁴
• Oil: I found no penalty in the certificate statute itself. The practical stop is Form 1, which the fire department signs only for a certificate holder.²⁹³⁰

Skipping permits

Breaking the building code is punishable "by a fine of not more than one thousand dollars or by imprisonment for not more than one year, or both, for each such violation," and "each day during which a violation exists shall constitute a separate offense."⁵⁵ Because you're on the HIC register, there's a second layer: for a registered contractor, "violation of the building laws" is a prohibited act under Chapter 142A, and every violation of that chapter is an unfair or deceptive act under Chapter 93A,⁵⁶ which lets a homeowner sue for damages that can be doubled or tripled, plus attorney's fees.

Workers' comp

"Every employer" must carry workers' compensation.⁵⁷ Without it, the state can serve a stop work order that shuts down "all business operations," with a civil penalty of $100 a day, and the employer faces a fine of up to $1,500 or a year in jail.⁵⁸

The HIC registration you already hold

The exemption works both ways. "Any person exempt from registration and who does not voluntarily register, is not subject to any of the provisions" of the regulation or the statute.⁹ You did register, so on home improvement jobs Chapter 142A applies to you: a written contract above $1,000, and your registration number on "every contract, building permit and advertisement."⁵⁹⁶⁰ Keep it renewed. Working without a current registration on non-exempt home improvement work, a lapsed one included, carries a fine of up to $5,000 or two years in jail.⁶¹

Can you still collect?

I found no Massachusetts statute that voids a contract because the trade work on it was unlicensed. The risk sits in Chapter 93A. In Groleau v. Russo-Gabriele (Superior Court, 2014) an unregistered home improvement contractor got his contract enforced, but the homeowner won her 93A counterclaim and her attorney's fees. That decision cites an earlier one in which a contractor who pulled no permits and "performed both plumbing and electrical work without a license" caused an injury the homeowner could sue over.⁶² Expect to collect, and expect the homeowner's lawyer to bring up every license and permit you didn't have.

Insurance

I found no Massachusetts statute that voids a liability policy for unlicensed work. The checks come earlier: a sheet metal worker or gas fitter applying for a permit signs "under the penalties of perjury" that they carry liability insurance (or hands over a waiver signed by the homeowner), and a sheet metal permit requires "completed operations coverage."⁴¹²⁴⁵ Your own policy's description of operations decides the rest, so read it before you take a job outside your licenses.

Your first 30 days: the Massachusetts HVAC checklist

This is the whole list. The printable version has the same items with blanks for your license, registration, permit, policy and EPA card numbers and your renewal dates: make your own copy in Google Docs, download the Word version (.docx), or download the PDF. Pick a format, enter your email and I'll send the links.

The business

• ☐ Entity. Form the LLC or corporation with the Secretary of the Commonwealth, which every trade business license requires, or as a sole proprietor file a business certificate with the clerk of each town where you have an office if you trade under a name other than your own.⁶³¹¹¹⁴ If a master gas fitter will hold your gas business license, name gas fitting as a discipline in the filing and list the master as an officer or manager.¹¹
• ☐ HIC registration. Keep it if you sell any home improvement work beyond installing heating and air-conditioning. It renews every two years for $100.⁶⁴

Licenses: decide who holds what

• ☐ Gas: a master gas fitter on staff and a gas fitting business license, or a gas fitter you sub to. A master plumber with a plumbing business license covers gas too, since plumbers may do gas fitting.¹¹⁶⁵¹⁸
• ☐ Sheet metal: a master on staff and the $225 sheet metal business license, or a licensed sub.¹⁴
• ☐ Oil: an oil burner certificate ($75) for every tech who touches a burner; $40 apprentice certificates for trainees.³
• ☐ Refrigeration: only if you'll work on systems of 10 tons or more: a refrigeration contractor license ($150 application) and licensed technicians.¹⁵
• ☐ Electrical: an A1 licensed electrical contractor you sub to.¹⁶
• ☐ Look up every license you'll rely on, yours and your subs', on the Division of Occupational Licensure's license check.⁶⁶

Insurance and bond

• ☐ Bond: none of these trades requires one that I found.
• ☐ General liability: no state minimum, but you need a policy for sheet metal and gas permits (sheet metal needs completed operations coverage), the sheet metal business license, Mass Save HPIN and your HIC registration ("adequate contractor insurance").⁴⁵¹⁴⁸⁹ Ask your agent for completed operations coverage either way.
• ☐ Workers' comp before your first employee starts.⁵⁷

EPA 608

• ☐ A copy of every tech's 608 card on file, and the list given to your supply house so the office can buy refrigerant for the techs.³³³⁴

Your numbers on everything

• ☐ Sheet metal: license type and number on every sign, listing, ad and "other business communication." Not required on vehicles.⁶⁷²⁰
• ☐ Gas: designation and license number on every sign, listing and ad.⁶⁵
• ☐ Refrigeration contractor: license number on all commercial vehicles, offers, invoices, installation drawings and stationery.²⁴
• ☐ HIC: registration number on every contract, building permit and ad.⁶⁰
• ☐ Take ductwork and gas work off your website, listings and trucks if nobody in the company holds that license.²⁰⁶⁵

Towns, permits and Mass Save

• ☐ For each town you'll work in: how the building department handles heat pump and AC permits, the gas inspector, the inspector of wires, and the fire department for oil.
• ☐ If you'll sell heat pumps, enroll in Mass Save HPIN: agreement, W-9, a qualifying license, liability certificate, 608 cards and manufacturer training.⁸
• ☐ Homes built before 1978: get the DLS lead-safe license ($375) and a certified supervisor, or keep wall and ceiling cuts under six square feet per room.³⁹

People

• ☐ Apprentices licensed before they start, on W-2, with the supervision their trade requires.⁴⁰¹¹⁴²

Renewals and continuing education

• ☐ Sheet metal: personal licenses every two years, expiring on the 28th of the holder's birth month; the business license every two years from its issue date.⁶⁸¹³
• ☐ Gas fitter: renewal opens February 1 of even-numbered years and closes May 1, with 6 hours of approved continuing education for gas fitters (12 for plumbers).⁶⁹
• ☐ Refrigeration: every two years on the holder's birthday, $50 for a technician and $75 for a contractor, with no extra documents.⁴⁹⁷⁰
• ☐ Oil burner: every two years on the holder's birthday, $50. Fire Services mails the renewal about 60 days ahead and wants it back 30 days before expiry.²⁹³
• ☐ HIC: every two years, $100.⁶⁴
• ☐ EPA 608: no renewal.³⁵

More for new HVAC contractors

• HVAC pricing guide: what to charge for a service call, your labor rate and the first jobs, with a free rate sheet.
• HVAC tune-up checklist: the visit in order, the target readings and what to charge, with a free report card.
• Opening a supply house account: what to bring, cash or credit, and how dealer programs work, with a free checklist.
• Quoting your first system replacement: the price, the scope and what the quote must include, with a free proposal template.
• Starting an HVAC business while still employed: side work, your boss's customers, non-competes and when to go.
• Register every install: maker deadlines, your labor warranty and what a callback costs, with a free close-out sheet.
• Your first slow season: the customer list and the one reminder that fills a calendar, with a free log.

Where Deepsel fits

Deepsel is the field service software I build, and for this topic it handles the paperwork side. Your shop-wide quote terms are copied onto every new quote and your invoice footer onto every invoice, so "MA Sheet Metal M-2 #", "Gas Fitter #" and "HIC #" with your numbers can go in both once and reach every customer after that. Customers approve and sign quotes on screen. Equipment records keep the type, brand, model, serial, year, filter size, tonnage, refrigerant, location and a nameplate photo, so the condenser you set is on file for the next call. It's free up to 30 estimates and 30 invoices a month, with scheduling and dispatch, quotes, invoicing, card payments, and customer and equipment records; Pro is $29 a month with unlimited estimates and invoices (see pricing). Deepsel doesn't know Massachusetts law. It has no permit, license or insurance tracking, and it won't stop you quoting a gas line you can't legally run.

Frequently asked questions

Does Massachusetts require an HVAC license?

No. Massachusetts has no HVAC contractor license and no mechanical license. The work is split by trade: a gas fitter or plumber for gas piping, gas appliances and their vents; an oil burner technician certificate for oil burners; a sheet metal license for ductwork; a refrigeration license only for systems of 10 tons or more; and an electrician for the circuit and disconnect. The refrigerant side of a typical house AC or heat pump needs no state license, only federal EPA 608 certification, plus a building permit.

Can you do HVAC work without a license in Massachusetts?

Some of it. With EPA 608 certification you can work on the refrigerant circuit of systems under 10 tons: setting condensers, running line sets, charging, service and diagnosis, and the building permit for an install that needs no structural cutting. Gas piping and gas appliance connections, oil burners, ductwork, the electrical circuit and refrigeration systems of 10 tons or more each need the matching license, and permits apply either way.

Do I need a license to install a mini-split in Massachusetts?

Not a state trade license for the refrigerant side of a typical house system, but everyone who opens the refrigerant circuit needs EPA 608 certification, and the new circuit and disconnect go to a licensed electrician. The state's January 2026 guidance says a ductless mini-split needs a building permit, and a construction supervisor license only if you cut or notch framing. For the customer to get a Mass Save rebate, your company has to be in the Heat Pump Installer Network, which asks for a sheet metal, refrigeration, electrical contractor or plumbing license.

What is the Massachusetts refrigeration license, and who needs it?

It's the refrigeration technician license from the Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters, and the statute applies it to refrigerant systems of 10 tons or more (120,000 BTU an hour). Most houses fall below that. From November 9, 2026, journeyman applicants need a 450-hour approved course, EPA 608 Universal and 6,000 hours as a licensed apprentice. The master license, also called the refrigeration contractor license, adds 2,000 hours as a journeyman and 100 hours of education, and lets the holder run a business and employ licensed technicians.

Do you need a sheet metal license for ductwork in a house in Massachusetts?

Yes. The statute's definition mentions commercial ducts, but the sheet metal board's regulation covers duct systems and ductwork in new or remodeling construction without that word, and its fact sheet says only licensed sheet metal workers may do the work at your home. Restricted J-2 and M-2 licenses exist for houses and small buildings. Cleaning and inspecting ducts needs no license; repairing or altering them does, on a sheet metal permit.

Can an HVAC technician install a gas furnace in Massachusetts?

Only with a gas fitter or plumber license, or working under the control and supervision of a licensed gas fitter or plumber who holds the gas permit. The plumbers and gas fitters board puts the complete installation of gas fueled equipment, venting included, on that licensee, who must be present at the final inspection. The ductwork connections need a sheet metal license and the wiring an electrician.

Do HVAC contractors need a home improvement contractor registration in Massachusetts?

Not for installing central heating or air-conditioning: the home improvement law exempts those installers. You need the registration if you sell other home improvement work on owner-occupied homes with one to four units, such as carpentry, drywall or insulation as a job of its own. If you register anyway, the home improvement law applies to you in full, including written contracts above $1,000 and your registration number on contracts, permits and ads.

Can a homeowner do their own HVAC work in Massachusetts?

Partly. A homeowner can pull their own building permit without a construction supervisor license, and can do their own sheet metal work in their own owner-occupied one- or two-family home. Gas permits go only to licensed plumbers and gas fitters, so the gas side stays with a licensee. Anyone who opens a refrigerant circuit needs EPA 608 certification, homeowners included.

How do I join the Mass Save Heat Pump Installer Network?

Enroll through Mass Save's heat pump installer page. A company representative submits the signed participation agreement, a W-9, a Massachusetts sheet metal, refrigeration, electrical contractor or plumbing license, a certificate of general liability insurance, and for air-source installers EPA 608 certification plus a manufacturer's heat pump installation training certificate. Within the first year installers add cold climate sizing and design training and the program's online courses. Residential heat pump rebates require an installer in the network.

Which license should a new Massachusetts HVAC company get first?

It depends on the work you want. My read: for heat pumps, a sheet metal license, because it covers ductwork and it's on Mass Save's accepted list. For gas heat, a gas fitter license, because every gas furnace and boiler job needs one. In oil country, the oil burner certificate is the fastest: an exam, $75 and no experience requirement. The refrigeration license matters only if you'll work on systems of 10 tons or more.

How do I look up an HVAC license in Massachusetts?

There's no HVAC license to look up. Use the Division of Occupational Licensure's Check a License page: sheet metal workers and plumbers and gas fitters are in eLIPSE, and refrigeration technicians and pipefitters have their own look-up. Check your subs' licenses there before you put them on a job.

Sources

1. M.G.L. c. 146, section 81, definitions - "Refrigeration", "the installation, repair, replacement, maintenance of any refrigerant containing part of any refrigerant system of a ten ton capacity, or greater"; "Pipefitting", for heating systems "having a rating greater than 700,000 British Thermal Units," "but excluding sheet metal work, refrigeration systems, boilers and plumbing"; "Master refrigeration technician", "a person having a regular place of business"; "Refrigeration apprentice", working "under the supervision of a master refrigeration technician or journeyman refrigeration technician." malegislature.gov, read November 3, 2026.
2. M.G.L. c. 142, section 1 - "Gas fitting", "the installation, alteration, and replacement of a piping system beyond the gas meter outlet or regulator ... including the connection therewith and testing of gas fixtures, ranges, refrigerators, stoves, water heaters, house heating boilers, and any other gas using appliances, and the maintenance in good and safe condition of said systems"; "Plumbing", piping "in connection with any of the following: sanitary drainage, storm drainage facilities, special wastes, the venting system and the public or private water-supply systems." malegislature.gov, read November 3, 2026.
3. Department of Fire Services, "Apply for an Oil Burner Technician or Apprentice Certificate" - "The Oil Burner Technician Certificate allows the holder to service, install and repair oil burners that burn fuel oil and associated equipment"; "The Oil Burner Apprentice Certificate allows the holder to work under the supervision of a licensed Oil Burner Technician"; fees: technician $75, renewal $50, apprentice $40, renewal $20; 18 years old and a written exam (none for apprentices); "Licenses are good for two years"; renewal application mailed 60 days before expiry, due 30 days before. mass.gov, read November 3, 2026.
4. Board of Examiners of Sheet Metal Workers, "Sheet metal worker consumer fact sheet" - "Only a master or journeyperson sheet metal worker examined and licensed by the Board ... with the proper permits issued by the local building inspector, can perform sheet metal work at your home or business"; restricted journeyperson: three years as an apprentice and 450 hours of theory; unrestricted: five years and 750 hours; masters: a 40-hour master class and exam, and may work "either as an individual, a firm, or a corporation"; "The local building inspector must issue a permit before any sheet metal work can be installed, altered, removed, replaced, or repaired. Permits for performing sheet metal work are issued only to licensed sheet metal workers"; license type and number "must be shown on any sign, listing, or advertisement"; "When applying for a permit, a licensed sheet metal worker must sign, under the penalties of perjury, that they carry liability insurance, or that person must present a waiver of insurance signed by you, the homeowner." mass.gov, read November 3, 2026.
5. M.G.L. c. 141, section 1A - "No person, firm or corporation shall enter into, engage in, or work at the business or occupation of installing wires, conduits, apparatus, devices, fixtures, or other appliances for carrying or using electricity for light, heat, power, fire warning or security system purposes, unless such person, firm or corporation shall be licensed by the state examiners of electricians." malegislature.gov, read November 3, 2026.
6. 40 CFR 82.161, "Technician certification" (eCFR, as of October 1, 2026) - from January 1, 2018 it covers "any non-exempt substitute refrigerant"; "(1) Any person who could be reasonably expected to violate the integrity of the refrigerant circuit during the maintenance, service, repair, or disposal of appliances ... must pass a certification exam"; "(2) Apprentices are exempt ... provided the apprentice is closely and continually supervised by a certified technician." ecfr.gov (read through the eCFR API), read November 3, 2026.
7. Division of Occupational Licensure, Office of Public Safety and Inspections, "Minisplit Permitting and Licensing Guidance for 1 & 2 Family Dwellings," based on the 10th edition of 780 CMR (posted January 22, 2026) - "Therefore the 780 CMR states that a Ductless mini-split system requires a permit"; "a construction supervisor's license is not required for the most basic of installations but is required if cutting or notching of building elements is required"; "the Building Official having jurisdiction must make individual determinations." mass.gov, read November 3, 2026.
8. Mass Save, "Heat Pump Installers" (trade partners) - an authorized company representative must submit "A signed Mass Save Heat Pump Installer Participation Agreement," "Business W-9 Form," "Massachusetts HVAC or Electrical Contractor/Plumbing License (Massachusetts Sheet Metal, Refrigeration, Electrical Contractor, or Plumbing License accepted)," "Certificate of Comprehensive General Liability Insurance," and for air source and VRF primary installers "EPA Section 608 Certification and certification of air source heat pump installation training provided by a heat manufacturer"; within the first year, cold climate sizing and design training and the program's learning center courses. masssave.com, read November 3, 2026.
9. 201 CMR 18.00, "Registration and Enforcement of Home Improvement Contractor Program" - 18.01(6): "Any person exempt from registration and who does not voluntarily register, is not subject to any of the provisions of 201 CMR 18.00 or M.G.L. c. 142A"; exempt: "(j) persons who install any or all of the following: 1. central heating; 2. air-conditioning systems; 3. energy-conservation devices"; applicants show "evidence that they maintain adequate contractor insurance." mass.gov; the statute's version, M.G.L. c. 142A, section 14: "persons who install central heating, air-conditioning systems, energy-conservation devices, or provide conservation services conducted by or on behalf of a public utility" malegislature.gov. Both read November 3, 2026.
10. Reddit, r/HVAC (May 22, 2024) - "I have a universal EPA Certification that I got 8 years ago. Been doing service and some install since then. I have started my own business 2 years ago but Google won't let me advertise until I provide them with a hvac license. I told them Mass doesn't offer that." reddit.com.
11. 248 CMR 3.03, "Business and Apprentice Licenses" - "All corporations, LLC's, partnerships, or other such entities that have plumbing or gas fitting employees are required to maintain a business license"; "Individuals practicing under their own name or a DBA do not require a business license"; the applicant for a gas fitting corporation or LLC is a master gas fitter who is a listed officer or manager, gas fitting must be named as a discipline in the filing, all partners must be masters; "Business licenses are only transferable with Board approval" (the older Cornell LII copy still reads "not transferable"); a new application within 15 days of the master's withdrawal, and "The business may not continue to operate after 60 days"; "Any discipline against a licensee of record shall be considered discipline against the business"; apprentices licensed, and payment on an IRS form 1099 "shall be considered sufficient evidence" of an independent contractor, with the master "subject to disciplinary action for aiding and abetting unlicensed practice." No sentence limits a master to one business. mass.gov (posted October 24, 2025); Cornell LII. Both read November 3, 2026.
12. Board of State Examiners of Plumbers and Gas Fitters, "Plumbers and gas fitters consumer fact sheet" - "Any person licensed as a master or journeyman plumber may perform the work of a gas fitter, but a licensed master or journeyman gas fitter may not carry out the work of a plumber"; journeyman gas fitter: two years as an apprentice and 150 hours of theory; master: one year as journeyman and an exam; a master gas fitter "may work either as an individual, a firm, or a corporation"; "When applying for a permit, a licensed plumber or gas fitter must sign, under the penalties of perjury, that s/he carries liability insurance, or that person must present a waiver of insurance signed by you, the homeowner." mass.gov, read November 3, 2026.
13. 271 CMR 7.00, "Business Licensure" - "All entities that have Sheet Metal Worker employees are require[d] to maintain a business license"; a master as corporate officer or LLC manager, the "Responsible Craftsman," who "shall be personally responsible for the activities of the business"; renewal every two years; "Businesses shall notify the Board within 60 days of any change in the Craftsman of Record. After this period, if there is no available Master Sheet Metal Worker willing to become craftsman of record, the business must cease sheet metal work operations, bidding, and permitting." mass.gov, read November 3, 2026.
14. Board of Examiners of Sheet Metal Workers, "Sheet metal business license application" - "all business entities performing sheet metal work in Massachusetts must be licensed by the Board"; "Each corporation must have at least one Master Sheet Metal Worker as a corporate officer"; "Each LLC must designate a Master Sheet Metal Worker as the Manager and Responsible Craftsman"; the business's certificate of liability insurance; $225. mass.gov, read November 3, 2026.
15. Office of Public Safety and Inspections, "Apply for a Refrigeration Contractor License" - "This license allows the holder to have a regular place of business and to employ duly licensed people to perform refrigeration work"; $150 application fee; 100 hours of additional refrigeration training; "A Refrigeration Apprentice must be licensed with the OPSI, must hold a valid registration with the Division of Apprentice Standards, and must be employed by a Massachusetts Refrigeration Contractor"; "A Refrigeration Technician can supervise the work of the Refrigeration Apprentice." mass.gov, read November 3, 2026.
16. Board of State Examiners of Electricians, "Electricians FAQs general topics" - "There is no generic exception for 'low voltage' wiring, as depending on its use it may be subject to licensing requirements. We advise installers to coordinate with their local inspector of wires"; "the company will need to have a business license, with either a Master Licensee of Record (LOR), for an A1 Electrical Business license, or a Systems Contractor Licensee of Record, for a C1 Systems Business license." mass.gov, read November 3, 2026.
17. 780 CMR 110.R5, "Licensing of Construction Supervisors," Massachusetts State Building Code, 10th edition (unofficial copy) - 110.R5.1.3.1 "Individuals supervising persons engaged in construction, reconstruction, alteration, repair, removal or demolition involving any activity regulated by any provision of 780 CMR, shall be licensed"; the homeowner exception, "if a homeowner engages a person(s) for hire to do such work, then such homeowner shall act as supervisor"; 110.R5.1.3.2 item 6, exempt: "the practice of any trade licensed by agencies of the Commonwealth, provided that any such work is within the scope of said license including, but not limited to wiring, plumbing gas fitting, fire protection systems, pipefitting, HVAC and refrigeration equipment." mass.gov, read November 3, 2026.
18. 248 CMR 3.05, "Permits and Inspections" - permit applications go to local inspectors (state inspectors for state buildings); "Until a Permit has been issued by the Inspector, plumbing or gas fitting work shall not be: a. installed; b. altered; c. removed; d. replaced; or e. repaired"; gas permits "shall be issued to properly licensed individuals"; for a corporation or LLC, "only the Master Plumber or the Master Gas Fitter who is a manager of the LLC or the officer of the corporation"; emergency installs when "the licensee and gas supplier (if applicable) are satisfied" and the inspector is told by the next working day; no permit for "Adjustment of gas appliance controls when said adjustment does not require any changes to the connection to the gas supply or associated piping." mass.gov; Cornell LII. Both read November 3, 2026.
19. M.G.L. c. 112, section 239 - a master as officer of a corporation or manager of an LLC, all partners masters; "(b) No corporation, partnership, LLC, LLP or other entity shall engage in business, advertise the provision of sheet metal work, make application for and take out permits for sheet metal work, bid for sheet metal work, permit its employees to perform sheet metal work ... unless the entity and all employees who performing such work hold a license or certificate"; the certificate goes to a master "who shall be responsible for all sheet metal work performed by that entity." No sentence limits a master to one entity. malegislature.gov, read November 3, 2026.
20. 271 CMR 5.02, "Rules Governing Practice" - scope: "duct or air exhaust systems" and "ductwork installed during new or remodeling construction"; no license needed for transport of materials or for "Work performed by homeowners within their own one-two family, owner-occupied building"; apprentices under "direct, on-site supervision"; "The on-site Apprentice-to-supervisor ratio shall be at least 1:1"; J-2 and M-2 licenses cover "residential jobs and non-residential jobs which are under three stories and up to and including 10,000 square feet"; "Two or more Journeypersons shall not associate as partners"; "Advertising or representation by unauthorized individuals and entities shall be considered unlicensed practice"; any ad or business communication "shall indicate the type of license ... and the license number. NOTE: License numbers shall not be required on vehicles." mass.gov; Cornell LII. Both read November 3, 2026.
21. M.G.L. c. 112, section 245(b) - grounds for sheet metal discipline include "(6) aiding or abetting an unlicensed person to practice sheet metal work." malegislature.gov, read November 3, 2026.
22. 528 CMR 2.00, Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters, definitions (Mass. Register #1534, November 8, 2024) - "Refrigeration. The installation, repair, replacement, and/or maintenance of any refrigerant-containing part of any refrigerant system of a ten ton capacity or greater"; "Refrigeration System. A combination of interconnected parts forming a closed circuit"; "Ton of Refrigeration ... 12,000 BTU per hour." mass.gov, read November 3, 2026.
23. Office of Public Safety and Inspections, "Apply for a Refrigeration Technician License" - "This license is required for anyone who performs refrigeration work having a capacity over 10 tons in the aggregate"; $75 application fee; Universal CFC (EPA 608) certification required; phone (617) 727-3200. mass.gov, read November 3, 2026.
24. 528 CMR 11.03, "Refrigeration Technicians/Contractor Licensing" - for journeyman applications dated on or after November 9, 2026, "a formal 450 hour course of study," EPA Section 608 Universal and "6,000 clock hours as a validly licensed Refrigeration Apprentice"; hardship waivers: "no such waivers shall be granted on or after May 10, 2027"; master/contractor: "at least 2,000 hours of work experience as a Massachusetts Journeyman Refrigeration Technician" and "100 hours of Bureau approved education"; the master "must prominently display his or her Master Refrigeration Technician/Refrigeration Contractor's license number on all commercial vehicles, offers, invoices, installation drawings, and on all stationery used in their business." mass.gov; Cornell LII. Both read November 3, 2026.
25. Office of Public Safety and Inspections, "Effective November 9, 2026, new licensing requirements take effect for Journeyman Pipefitters and Refrigeration Technicians" - "a 450-hour course of study approved by the Bureau" and "6,000 clock hours as a validly licensed apprentice," with a hardship waiver policy. mass.gov, read November 3, 2026.
26. M.G.L. c. 112, section 237 - "'Sheet metal work', the manufacturing, fabrication, assembling, handling, erection, installation, dismantling, alteration and repairing of all commercial duct or air exhaust systems, except for refrigeration and combustion units; ... provided, however, that sheet metal work shall not include the work conducted by a licensed pipe fitter, oil burning technician, refrigeration technician, plumber or gasfitter." malegislature.gov, read November 3, 2026.
27. Board of Examiners of Sheet Metal Workers, "Board Policies and Guidelines" - Policy Bulletin: Preventative Maintenance of Sheet Metal Work (effective November 15, 2021): visual inspections, cleaning, or oiling/greasing "does not require a sheet metal license, or a sheet metal permit," but "any reinstallation, handling, dismantling, alteration or repair" is licensed work with a permit; "All residential fans and associated ductwork shall be installed by a licensed sheet metal worker." mass.gov, read November 3, 2026.
28. Board of State Examiners of Plumbers and Gas Fitters, "Venting of Flue Gases" (page updated October 27, 2026) - "permits to perform gas fitting work shall only be issued to licensed plumbers or licensed gas fitters"; "The complete installation, alteration, replacement or repair of gas fueled equipment requires that the licensed plumber or gas fitter provide for the proper venting"; "The licensed plumber or gas fitter must be present for the final inspection"; "only a licensed plumber or gas fitter or an appropriately trained person under the control and supervision of a licensed plumber or gas fitter can perform such work"; venting for gas equipment under 400,000 BTU/hr may be installed by qualified individuals when a supervising licensed plumber or gas fitter "has secured a gas fitting permit." mass.gov, read November 3, 2026.
29. M.G.L. c. 148, section 10D - the oil burner technician certificate runs to the holder's birthday 12 to 24 months after issue and renews without exam; "A person holding a certificate as an oil burner technician may connect or disconnect for the purpose of repair or replacement, any device or control required ... to be a part of an oil burner installation ... notwithstanding any contrary provision of chapter one hundred and forty-one"; licensed electricians may do electrical work on oil burning equipment without the certificate. malegislature.gov, read November 3, 2026.
30. Department of Fire Services, FP-056 Form 1 under 527 CMR 1.00, section 1.12.8.2.1, "Application for Permit, Permit, and Certificate of Completion for the Installation or Alteration of Fuel Oil Burning Equipment and the Storage of Fuel Oil" (rev. 6/23) - "Once signed by the fire department, this is a PERMIT for the storage of fuel oil and use of the oil burning equipment"; "Certificate of Competency required, no other license acceptable, plumbing, electrical, etc." mass.gov, read November 3, 2026.
31. M.G.L. c. 141, section 7 - the exceptions: elevators, utility lines and meters, public signalling and street lighting, telecommunications, cable television and computer systems. None for heating or air-conditioning installers. malegislature.gov, read November 3, 2026.
32. M.G.L. c. 143, section 3L - "No person shall install for hire any electrical wiring or fixtures subject to this section without first or within five days after commencing the work giving notice to the inspector of wires"; failure "shall be punished by a fine not exceeding five hundred dollars." malegislature.gov, read November 3, 2026.
33. 40 CFR 82.154(c), "Sales restriction" (eCFR, as of October 1, 2026) - no sale of refrigerant unless "(i) The buyer has been certified as a Type I, Type II, Type III, or Universal technician" or "(ii) The buyer employs at least one technician who is certified ... and provides proof of such to the seller." ecfr.gov (read through the eCFR API), read November 3, 2026.
34. U.S. EPA, "Questions and Answers about the Refrigerant Sales Restriction" - "any person servicing, installing or disposing of stationary appliances (except the disposal of small appliances) must be a section 608 certified technician"; buyers may show "a copy of the certification card and a list of those authorized to buy refrigerant." epa.gov, read November 3, 2026.
35. U.S. EPA, "Section 608 Technician Certification Requirements" - "Section 608 Technician Certification credentials do not expire." epa.gov, read November 3, 2026.
36. Board of Building Regulations and Standards, "Advisory Regarding Use of A2L Refrigerants," issued November 12, 2024 - the 2021 International Mechanical Code "does not facilitate A2L refrigerants"; 780 CMR adopts ASHRAE 15-2022, ASHRAE 34-2022, UL/CSA 60335-2-40-2022 and 60335-2-89-2021; "the BBRS advises that any such installation consistent with this advisory is readily approvable by a reviewing building official." mass.gov, read November 3, 2026.
37. U.S. EPA, "Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements Promulgated Under the Technology Transitions Provisions of the American Innovation and Manufacturing Act of 2020," 91 FR 31284 (May 26, 2026; effective July 27, 2026) - "This final rule also allows the inventory of residential and light commercial air conditioning and heat pump equipment that was manufactured in the United States or imported into the United States before January 1, 2025, to continue to be installed." federalregister.gov (read through the Federal Register API), read November 3, 2026.
38. U.S. EPA, "Apply For or Update Your Renovation Firm's Lead-Safe Certification" - "EPA certification does not apply in ... Massachusetts ... If you work in one of these areas you must apply directly to that program." epa.gov, read November 3, 2026.
39. Massachusetts Department of Labor Standards: "Lead-Safe Renovation Regulations in Massachusetts: Information for Contractors" (work in pre-1978 housing that disturbs "greater than six square feet of painted surface per room on the interiors of buildings or greater than 20 square feet of painted surface on the exterior"; contractors "must be licensed as 'Lead-Safe Renovation Contractors' by DLS"; a certified renovator-supervisor on site; "civil administrative penalties"); "Apply for a lead-safe renovation or deleading license" (Lead-Safe Renovator Contractor License, $375). information sheet, fees, mass.gov, read November 3, 2026.
40. M.G.L. c. 112, section 241 - an apprentice files for a license "before starting an apprenticeship"; "not more than 1 apprentice may work under the direct supervision of a master or a journeyperson in the employ of the master." malegislature.gov, read November 3, 2026.
41. 248 CMR 3.02, definitions - "Apprentice Gas Fitter. A person not less than 16 years of age who is licensed by the Board and learning and working at the business of gas fitting under the direct supervision of a master gas fitter or journeyman gas fitter while in the employ of a master gas fitter"; "Direct Supervision. Supervision that is on-site and present during the conducted work." mass.gov; Cornell LII. Both read November 3, 2026.
42. Department of Fire Services, form BPV-011, "Application to Examine for Oil Burner Technician" (revised August 2024) - "There are no prerequisites for the apprentice certificate. The only requirement is that the apprentice work only under the direct supervision of a person holding a valid Massachusetts Certificate of Competency as an Oil Burner Technician." mass.gov, read November 3, 2026.
43. M.G.L. c. 112, section 249 - "No person shall install sheet metal work without first obtaining a permit from the local inspector of buildings or other official"; "A person failing to obtain the permit shall be punished by a fine to be determined by the board." malegislature.gov, read November 3, 2026.
44. 780 CMR 51.00, Massachusetts Residential Code, 10th edition, Chapter 1 (unofficial copy dated April 29, 2025) - R105.1: "It shall be unlawful to construct, reconstruct, alter, repair, remove or demolish a building or structure; or to change the use or occupancy of a building or structure; or to install or alter any equipment ... without first filing an application with the building official and obtaining the required permit"; R105.2, work exempt from permit (sheds, fences, retaining walls, finish work, small decks and the like; no heating or cooling item); R105.3 item 8, HIC registration number on the application; R105.3.1 item 5, workers' compensation insurance. mass.gov, read November 3, 2026.
45. M.G.L. c. 112, section 247 - "no licensed journeyperson or master sheet metal worker shall be issued a permit for the performance of sheet metal work ... unless the licensee has a current liability insurance policy, including completed operations coverage, ... or a bond." malegislature.gov, read November 3, 2026.
46. City of Boston, "Gas Permit" - "You need a Gas Permit if you are a contractor working on a project that involves gas or the installation and replacement of gas lines, gas appliances, or gas heaters"; "Licensed contractors only." boston.gov, read November 3, 2026.
47. City of Boston, "Sheet Metal Permit" - "Available to licensed contractors only"; fee "$20, plus $25 per 200 linear or square feet." boston.gov, read November 3, 2026.
48. Mass Save, "Air Source Heat Pumps" (residential rebates) - "Equipment must be installed between January 1, 2026 and December 31, 2026. Equipment must be installed by a contractor participating in the Mass Save Heat Pump Installer Network." masssave.com, read November 3, 2026.
49. M.G.L. c. 146, sections 84 and 85 - "No person shall ... work as a refrigeration technician ... unless that person is lawfully licensed under section 85"; licenses "shall be valid throughout the commonwealth but shall not be assignable or transferable," run to the licensee's birthday 12 to 24 months after issue, renew every two years, and if not renewed "become void, and shall after one year be reinstated only by reexamination." Section 84, Section 85, malegislature.gov, read November 3, 2026.
50. M.G.L. c. 112, section 246 - whoever "not being licensed to practice sheet metal work ... practices or attempts to practice sheet metal work ... shall be punished by a fine of not less than $100 nor more than $1,000." malegislature.gov, read November 3, 2026.
51. M.G.L. c. 112, section 65A - boards under the Division of Occupational Licensure may assess "a civil administrative penalty not to exceed $1,000 for the first violation and a civil administrative penalty not to exceed $2,500 for a second or subsequent violation" on a person who practices without the required license. malegislature.gov, read November 3, 2026.
52. M.G.L. c. 142, section 16 - unlicensed plumbing or gas fitting "shall be punished by a fine not exceeding one hundred dollars." malegislature.gov, read November 3, 2026.
53. M.G.L. c. 146, section 89 - unlicensed refrigeration or pipefitting "shall for the first offense be punished by a fine of not less than ten nor more than one hundred dollars, and for a subsequent offense by a fine of not less than fifty nor more than five hundred dollars or by imprisonment in the house of correction for six months or both." malegislature.gov, read November 3, 2026.
54. M.G.L. c. 141, section 5 - unlicensed electrical work: "for the first offence ... a fine of not less than $1,000 and not more than $1,500, for a second offence by a fine of not less than $1,500 and not more than $2,000 and for each subsequent offence by a fine of not less than $2,000 and not more than $2,500 or by imprisonment in the house of correction for six months, or both." malegislature.gov, read November 3, 2026.
55. M.G.L. c. 143, section 94(a) - "Whoever violates any provision of the state building code ... shall be punished by a fine of not more than one thousand dollars or by imprisonment for not more than one year, or both, for each such violation. Each day during which a violation exists shall constitute a separate offense." malegislature.gov, read November 3, 2026.
56. M.G.L. c. 142A, section 17 - prohibited acts include "(10) violation of the building laws of the commonwealth or of any political subdivision thereof"; "Violations of any of the provisions of this chapter shall constitute an unfair or deceptive act under the provisions of chapter ninety-three A." malegislature.gov; and M.G.L. c. 93A, section 9 (actual damages, "up to three but not less than two times such amount" for a willful or knowing violation, and attorney's fees) malegislature.gov. Read November 3, 2026.
57. M.G.L. c. 152, section 25A - "every employer shall provide for the payment to his employees of the compensation provided for by this chapter," by insurance or approved self-insurance. malegislature.gov, read November 3, 2026.
58. M.G.L. c. 152, section 25C - a stop work order "requiring the cessation of all business operations," lifted on proof of coverage and "a civil penalty ... in the amount of one hundred dollars per day"; and an employer who fails to insure "shall be punished by a fine of not more than one thousand five hundred dollars or by imprisonment for not more than one year, or both." malegislature.gov, read November 3, 2026.
59. M.G.L. c. 142A, section 2 - "Every agreement to perform residential contracting services in an amount in excess of one thousand dollars shall be in writing." malegislature.gov, read November 3, 2026.
60. M.G.L. c. 142A, section 13 - "(c) Every contract, building permit and advertisement shall display the contractor's or subcontractor's certificate of registration number." malegislature.gov, read November 3, 2026.
61. M.G.L. c. 142A, section 19 - a contractor who operates without a registration "and who is not otherwise exempt from the registration requirement," or "who fails to renew his certificate of registration, shall be punished by a fine not exceeding five thousand dollars or imprisonment not exceeding two years, or both." malegislature.gov, read November 3, 2026.
62. Groleau v. Russo-Gabriele, Civil No. 2012-1818 (Mass. Super. Ct. Nov. 26, 2014) - an unregistered home improvement contractor's contract was enforced ("it does not follow that the contract is automatically unenforceable"), but the homeowner won her Chapter 93A counterclaim and her attorney's fees; the court cites Williams v. Perrault, 2011 Mass. App. Div. 180, as "injury where a contractor did not obtain any required permits and performed both plumbing and electrical work without a license." courtlistener.com, read November 3, 2026 for my MA HIC license article.
63. M.G.L. c. 110, section 5 - "Any person conducting business in the commonwealth under any title other than the real name of the person conducting the business ... shall file in the office of the clerk of every city or town where an office of any such person or partnership may be situated a certificate." malegislature.gov, read November 3, 2026.
64. Office of Consumer Affairs and Business Regulation, "Home Improvement Contractor Registration and Renewal" - $150 registration fee plus a Guaranty Fund payment of $100 to $500 by number of employees; "Your HIC registration must be renewed every two years"; "Pay the $100 renewal fee." mass.gov, read November 3, 2026.
65. M.G.L. c. 142, section 3 - license required; a licensed plumber "may carry on the work of a gas fitter"; gas company employees "shall not require a gas fitter's license while performing work for said gas company"; "Any sign, listing or advertisement of a master plumber, a master gas fitter, a journeyman plumber or a journeyman gas fitter shall contain his designation and license number." malegislature.gov, read November 3, 2026.
66. Division of Occupational Licensure, "Check a license" - separate look-ups for plumbers and gas fitters and sheet metal workers (eLIPSE) and for pipefitters, refrigeration technicians and sprinkler fitters. mass.gov, read November 3, 2026.
67. M.G.L. c. 112, section 238 - license required to work as a master, journeyperson or apprentice; "(c) A sign, listing or advertisement of a sheet metal business, master or that of a journeyperson sheet metal worker shall contain his designation and license number." malegislature.gov, read November 3, 2026.
68. 271 CMR 3.02 - "Licensees must renew their licenses every two years"; a license "shall expire on the 28 day of the licensee's birth month." Renewal fees on the board's renewal page: apprentice $40, journeyperson $80, master $100, business $225. 271 CMR 3.00, renewal page, mass.gov, read November 3, 2026.
69. Board of State Examiners of Plumbers and Gas Fitters, "Renew a plumber, gas fitter, or liquified petroleum installer license" - "Licenses are eligible for renewal on February 1st of every even-numbered year. The deadline for application submission is May 1st"; 12 hours of approved continuing education for plumbers, 6 for gas fitters; and 248 CMR 11.04 (continuing education "during every two year license cycle"; none for apprentices). mass.gov; Cornell LII. Both read November 3, 2026.
70. Office of Public Safety and Inspections, "Renew your Pipefitter, Refrigeration Technician, or Sprinkler Fitter License" - renewal fees $50 journeyman/technician and $75 master/contractor; the insurance certificate is asked only of sprinkler fitter contractors, and "All other Bureau licenses do not require further documentation for renewal"; notices sent 60 days before expiration. mass.gov, read November 3, 2026.