Massachusetts

Massachusetts layers multiple credential types across 6 regulatory bodies. A Construction Supervisor License (CSL) is required for residential and small-building work. Separate state licenses cover electrical, plumbing, and gas fitting. Home improvement contractors must register with the state. Highway contractors face prequalification on contracts over $50,000.

Always verify statutes, fees, and application details with the live regulator before making bidding, licensing, or legal decisions.

At a glance

The fastest way to orient yourself in Massachusetts is to understand the three main credential layers: the Construction Supervisor License for building work, trade licenses for electrical and plumbing, and highway prequalification for public works.

Signal	Value
Construction Supervisor License (CSL)	Required for 1-2 family dwellings and buildings up to 35,000 cu ft
Home Improvement Contractor (HIC) registration	Required for work on existing 1-4 unit owner-occupied dwellings
Highway prequalification trigger	Non-building contracts over $50,000
Public works bid bond	5% on contracts over $5,000
Certificate of eligibility	Required for public contracts over $25,000
Written contract requirement	Agreements over $1,000 with homeowners must be in writing
Electrical and plumbing	State license required for all work
Reciprocity model	Electrical only; New Hampshire

Frequently asked questions

Pick the tab that matches your situation. Each FAQ gives a direct answer and points you to the full detail below.

Contractors
Regulators

What is a Construction Supervisor License (CSL) and when do I need one?

A CSL is required for anyone supervising the construction of 1-2 family dwellings or any building up to 35,000 cubic feet. The supervisor on site must hold this license. It requires 3 years of documented experience and an open-book exam on the MA State Building Code with a 70% passing score. See Requirements.

How do I register as a Home Improvement Contractor (HIC)?

Register with the Office of Consumer Affairs and Business Regulation. The registration fee is $100 (waived if you hold a valid CSL). You must also contribute to a Guaranty Fund ($100 to $500 based on employee count) and carry workers’ compensation insurance. All contracts over $1,000 with homeowners must be in writing. See Requirements.

Where do I go to get licensed in Massachusetts?

Massachusetts has 6 separate regulatory bodies. The CSL comes from the Board of Building Regulations & Standards (BBRS). HIC registration goes through the Office of Consumer Affairs. Electrical licensing is through the Board of State Examiners of Electricians. Plumbing and gas fitting are through the Board of State Examiners of Plumbers & Gas Fitters. See Who regulates construction.

How much does it cost to get a CSL?

The exam fee is $100, the initial license is $150 for a 3-year term, and biennial renewal is $100. Processing takes approximately 30 days. See Requirements.

What are the experience requirements for an electrical license?

Class A Master requires 1 year as a Massachusetts Journeyman plus 150 hours of classroom instruction. Class B Journeyman requires 8,000 hours over 4+ years under a Journeyman plus 600 hours of classroom instruction plus a high school diploma. See Requirements.

Can I use my out-of-state license in Massachusetts?

Reciprocity is very limited. Only electrical licenses (Master and Journeyman) have reciprocity, and only with New Hampshire. Plumbing and gas fitting applicants from other states may petition the Board for equivalency but must still pass the exam. See Reciprocal agreements.

What if my project requires both a CSL and trade licenses?

A single residential renovation may require all three: the supervisor holds a CSL, the contractor has HIC registration, and the electrician and plumber hold separate trade licenses. These are issued by different agencies and must be obtained independently. See Construction work regulated.

When is highway prequalification required?

Prequalification is required for non-building public works contracts over $50,000. There is no application fee. Prequalification is valid for 1 or 3 years. A 5% bid bond is required on public works contracts over $5,000, and a certificate of eligibility is required for contracts over $25,000. See Requirements.

Does Massachusetts require a license for roofing work?

Roofing falls under the CSL system. The CSL includes a Roof Covering classification. If you are supervising roof work on 1-2 family dwellings or buildings up to 35,000 cubic feet, a CSL with the appropriate classification is required. See Types of licenses.

Does Massachusetts require licensing for residential work?

Yes. Building 1-2 family dwellings requires a CSL. Home improvement on existing 1-4 unit owner-occupied dwellings requires HIC registration. Electrical, plumbing, and gas fitting require separate trade licenses regardless of project type. See Construction work regulated.

What are the plumbing license requirements?

Journeyman Plumber requires 6,800 hours as a licensed apprentice under a Master Plumber plus 550 hours of plumbing theory. Journeyman Gas Fitter requires 5,100 hours plus 330 hours of gas fitting theory. Out-of-state licensees can petition the Board but must still pass the exam. See Requirements.

How does Massachusetts's licensing model compare to single-board states?

Massachusetts is a multi-board state with 6 separate regulatory bodies. The CSL and trade licenses serve different purposes and are issued by different agencies, even though they may apply to the same project. This contrasts with states like Connecticut that centralize all licensing under one department. See Who regulates construction.

How do the CSL and HIC credentials differ?

The CSL is issued by the Board of Building Regulations & Standards for construction supervision of new residential and small buildings. HIC registration is through the Office of Consumer Affairs for home improvement on existing properties. A contractor may need both if they supervise construction and also do improvement work on existing homes. See Construction work regulated.

What types of construction work are regulated at the state vs. local level?

Massachusetts regulates building supervision (CSL), home improvement (HIC), electrical, plumbing, gas fitting, asbestos, lead abatement, and highway work at the state level. General commercial construction without building supervision requirements may fall to local jurisdictions. See Construction work regulated.

How does Massachusetts's $50,000 highway threshold compare to other states?

The $50,000 highway prequalification threshold is moderate. Maine triggers at $600,000, Alabama requires prequalification for all state highway work, and many states have lower or higher thresholds. For cross-state comparison, see Licensing thresholds.

What are the fees across credential types?

CSL: $100 exam, $150 initial 3-year license, $100 biennial renewal. HIC: $100 registration plus $100-$500 guaranty fund. Highway prequalification has no application fee. Electrical and plumbing fees are set by their respective boards. See Requirements for complete details.

What license classifications does Massachusetts use?

CSL offers 7 classifications (1 & 2 Family Dwellings, Masonry, Roof Covering, Windows/Door/Siding, Solid Fuel-Burning, Demolition, Insulation). Electrical has 4 classes (A through D). Plumbing has 12+ license types including plumber, gas fitter, and LP gas tiers. See Types of licenses.

How does reciprocity work in Massachusetts?

Reciprocity is narrow — electrical only, with New Hampshire only. Plumbing and gas fitting applicants from other states may petition for equivalency consideration but must still pass the relevant examination. See Reciprocal agreements.

What exam requirements exist across the different boards?

CSL requires an open-book exam on the state building code with 70% passing score. Electrical requires both work experience (up to 8,000 hours) and classroom instruction (up to 600 hours). Plumbing requires extensive apprentice hours (up to 6,800) plus theory instruction (up to 550 hours). See Requirements.

What are the renewal cycles across Massachusetts's boards?

CSL is a 3-year initial term with biennial renewal. HIC registration renews at $100. Highway prequalification is 1 or 3 years. Electrical and plumbing renewal cycles are set by their respective boards. See Requirements.

How does Massachusetts compare to other Northeast states in regulatory complexity?

Massachusetts is among the more complex, with 6 separate agencies and overlapping credential requirements on single projects. Maine has no general contractor license at all. Connecticut centralizes under one department. New York has minimal state regulation. See the Northeast region guide.

Start with your goal

Pick the card that matches what you need right now. Each one links to the relevant section on this page.

Is licensure triggered?

Start with work type — residential building, home improvement, trades, or public works — to see which credentials apply.

Find the right regulator

Use the regulator directory to route your question to the correct Massachusetts board.

Application and renewal details

Exams, fees, experience hours, education requirements, and renewal cycles for each credential.

Reciprocity direction

Find out which electrical license levels have reciprocity with New Hampshire.

Special considerations

Different roles need different things from a Massachusetts page. Use the tab that matches your situation to see what matters most before you read the full detail below.

Contractors
Regulators

Start by identifying whether your project triggers the CSL, HIC registration, or a trade license — these can overlap. A single residential renovation may require all three.

A CSL is required for building 1-2 family dwellings and any building up to 35,000 cubic feet. The supervisor on site must hold this license.
Home improvement on existing 1-4 unit owner-occupied dwellings requires HIC registration. The registration fee is $100 (waived if you hold a valid CSL).
Electrical work requires a separate state license at the Master, Journeyman, Systems Contractor, or Systems Technician level.
Plumbing and gas fitting require separate state licenses with significant experience hour requirements.
Highway prequalification is needed for non-building public works contracts over $50,000.
All homeowner agreements over $1,000 must be in writing.

Readiness checklist

Four things you need to confirm before you can treat Massachusetts as “ready” for a bid or an application. If any of these are unclear, you are not ready yet.

Classify the project type

Determine whether the work triggers a CSL (new residential or small building), HIC registration (existing home improvement), trade license (electrical, plumbing, gas), highway prequalification, or asbestos/lead certification. Multiple credentials may apply.

Apply the right threshold tests

Highway prequalification on contracts over $50,000. Public works bid bond of 5% on contracts over $5,000. Certificate of eligibility for contracts over $25,000. Written contracts required on homeowner work over $1,000.

Route to the correct regulator

Massachusetts has 6 regulatory bodies. The CSL comes from BBRS, HIC from Consumer Affairs, and each trade has its own examining board.

Confirm the requirement set

Confirm exams, experience hours, education hours, fees, and renewal cycles for each credential that applies. Massachusetts has detailed classroom instruction requirements for most licenses.

If you can identify all applicable credential tracks, confirm the threshold tests, route to the correct boards, and verify the requirement sets, you have the minimum package needed for a Massachusetts readiness check.

Use these links to jump to related cross-state comparisons and workflows.

New state evaluation if you are screening Massachusetts for the first time.
Multi-state bid readiness if you need to compare Massachusetts with nearby jurisdictions.
Licensing thresholds or prequalification patterns for cross-state context.

Construction work regulated

Massachusetts uses multiple credential layers that can overlap on the same project. Regulation depends on building type, trade involvement, and contract value.

Work lane	What triggers regulation
New residential / small building construction	CSL required for 1-2 family dwellings and buildings up to 35,000 cu ft
Home improvement (existing residential)	HIC registration required for work on existing 1-4 unit owner-occupied dwellings
Electrical	State license required for all electrical work
Plumbing and gas fitting	State license required for all plumbing and gas fitting work
Highway / non-building public works	Prequalification required on contracts over $50,000
Public works (general)	Bid bond of 5% required on contracts over $5,000; certificate of eligibility required over $25,000
Asbestos and lead abatement	State license required through Department of Labor Standards

A single residential renovation project may require the supervisor to hold a CSL, the contractor to have HIC registration, and the electrician and plumber to hold separate trade licenses. These credentials are issued by different agencies and must be obtained independently.

Common determination scenarios

If you are trying to figure out where to start, expand the scenario that is closest to your situation.

Building a single-family home

A Construction Supervisor License is required. The supervisor needs 3 years of documented experience and must pass an open-book exam on the state building code (70% passing score). Exam fee is $100; initial license is $150 for a 3-year term. Trade licenses for electrical and plumbing are also required for those work components.

Renovating an existing owner-occupied duplex

HIC registration is needed. The initial guaranty fund contribution ranges from $100 to $500 based on number of employees. All contracts over $1,000 must be in writing. Workers’ compensation insurance is required. A CSL may also be required if the work involves structural changes. Check whether electrical or plumbing trade licenses apply.

Electrical installation

Route to the Board of State Examiners of Electricians. Class A Master requires 1 year as a Massachusetts Journeyman plus 150 hours classroom instruction. Class B Journeyman requires 8,000 hours over 4+ years under a Journeyman plus 600 hours classroom plus a high school diploma. Check reciprocity if licensed in New Hampshire.

Plumbing or gas fitting

Route to the Board of State Examiners of Plumbers & Gas Fitters. Journeyman Plumber requires 6,800 hours as an apprentice under a Master plus 550 hours of plumbing theory. Journeyman Gas Fitter requires 5,100 hours plus 330 hours of gas fitting theory. Out-of-state licensees can petition the board for equivalency but must still pass the exam.

Highway or non-building public work

Route to the Highway Division for prequalification on contracts over $50,000. No application fee. Prequalification is valid for 1 or 3 years. Contract limits are based on technical expertise and bonding capacity. Processing takes approximately 2 weeks.

Who regulates construction

Massachusetts splits construction regulation across 6 regulatory bodies. Use this directory to find the board that owns the lane you need.

Highway prequalification — Highway Division

Director of Prequalification, 10 Park Plaza, Room 3620, Boston, MA 02116Phone: (857) 368-8660 | Fax: (857) 368-0643Website: mass.gov/orgs/highway-division

Construction supervisor licensing — Board of Building Regulations & Standards

Department of Public Safety, One Federal Street, Suite 600, Boston, MA 02110Phone: (617) 727-3200Website: mass.gov/orgs/office-of-public-safety-and-inspections

Home improvement registration — Office of Consumer Affairs and Business Regulation

One Federal Street, Suite 720, Boston, MA 02110Phone: (617) 973-8787Website: mass.gov/orgs/office-of-consumer-affairs-and-business-regulation

Electricians — Board of State Examiners of Electricians

One Federal Street, Suite 600, Boston, MA 02110Phone: (617) 701-8786 | Fax: (617) 701-8652Website: mass.gov/orgs/board-of-state-examiners-of-electricians

Plumbers and gas fitters — Board of State Examiners of Plumbers & Gas Fitters

One Federal Street, Suite 600, Boston, MA 02110Phone: (617) 701-8798 | Fax: (617) 701-8652Website: mass.gov/orgs/board-of-state-examiners-of-plumbers-and-gas-fitters

Asbestos, deleading, and lead-safe renovation — Department of Labor Standards

Executive Office of Labor and Workforce Development, 100 Cambridge Street, 5th Floor, Boston, MA 02114Phone: (617) 626-6975Website: mass.gov/DOLS

Requirements

Each Massachusetts credential has its own application inputs, exams, fees, and renewal cycles. Expand the category that applies to your situation.

Construction Supervisor License (CSL)

Requirement	Detail
Exam	Open-book exam on the MA State Building Code; passing score of 70%
Experience	3 years documented construction experience
Exam fee	$100
Initial license	$150 (3-year term)
Biennial renewal	$100
Processing time	Approximately 30 days

Home Improvement Contractor (HIC) Registration

Requirement	Detail
Registration fee	$100 (waived if registrant holds a valid CSL)
Guaranty Fund contribution	$100 to $500 initial, based on number of employees; reassessment possible if fund is insufficient
Fund limits	$10,000 per individual claim; $75,000 per contractor
Written contracts	Required for all homeowner work over $1,000
Workers’ compensation	Required
Renewal	Registration fee of $100 at renewal

The HIC Guaranty Fund is a consumer protection mechanism. If the administrator determines the fund balance is insufficient to cover claims, registrants may face reassessment.

Electricians

All exam applicants must meet both work experience and education requirements set by the Board.

License class	Experience	Education
Class A — Master	1 year as a MA Class B Journeyman, actively engaged in electrical work	150 hours classroom instruction
Class B — Journeyman	8,000 hours over 4+ years under a Journeyman	600 hours classroom (225 required + 45 NEC + 351 elective) + high school diploma
Class C — Systems Contractor	1 year as a MA Class D Systems Technician, actively engaged in systems work	75 hours classroom instruction
Class D — Systems Technician	4,000 hours over 2+ years under a Systems Technician	300 hours education + high school diploma

Alternative paths exist for graduates of accredited electrical programs, community college programs, and registered apprenticeships. These may reduce the experience hour requirement.

Plumbers and Gas Fitters

License type	Experience	Education
Journeyman Plumber	6,800 hours as a licensed apprentice under a Master Plumber	550 hours plumbing theory
Journeyman Gas Fitter	5,100 hours as a licensed apprentice under a Master Gas Fitter	330 hours gas fitting theory
LP Gas Installer	3,400 hours over 2+ years in LP gas installations under a licensed installer, journeyman, or master	220 hours LP gas educational theory
Limited LP Gas Installer	1,700 hours construction experience with supervised observation of LP gas cylinder installation	N/A

Out-of-state or international licensees may petition the Board for equivalency consideration. Unless Massachusetts has a reciprocity agreement with the jurisdiction, all applicants must pass the relevant examination.

Asbestos and Lead Abatement

Asbestos and deleading work requires licensing through the Department of Labor Standards. Multiple license types exist for contractors, supervisors, workers, inspectors, and consultants.

Requirement	Detail
Asbestos contractor	Must be a certified firm, corporation, or business entity performing abatement
Asbestos supervisor	Licensed individual with managerial authority and responsibility for response action completion
Deleading contractor	Required for all deleading work (Class I projects); Lead-Safe Renovation Contractor license available for Moderate-Risk work
Deleading supervisor	Must be on site and in control of every Class I Deleading Project
Project monitor	Must be independent of the contractor performing the work; contracted directly by the facility owner

Highway Prequalification

Requirement	Detail
Application fee	None
Validity	1 year or 3 years at the discretion of the Highway Division; must also prequalify for individual projects before bidding
Contract limits	Based on technical expertise and bonding capacity
Categories	Bridge, highway, paving, marine construction, buildings, traffic signals and lighting
Processing time	Approximately 2 weeks

Public works contracts over $5,000 require a 5% bid bond. A certificate of eligibility from the Commissioner of Labor and Industries is required for contracts over $25,000.

Reciprocal agreements

Massachusetts has limited reciprocity. Only electrical licenses carry a reciprocal agreement, and only with New Hampshire. All other trades require applicants to meet Massachusetts requirements independently.

Reciprocity in Massachusetts is narrow. Only electrical licenses (Master and Journeyman) are covered, and only with New Hampshire. Plumbing and gas fitting applicants from other states may petition for equivalency but must still pass the exam.

Board	Reciprocal states	Coverage
Board of Electricians (Master and Journeyman)	New Hampshire	1 state

Types of licenses

This section lists the credential categories Massachusetts offers across its regulatory bodies. Use it when you need to confirm the exact license name for an application or comparison.

Construction Supervisor (CSL)

1 & 2 Family Dwellings
Masonry
Roof Covering
Windows, Door, Siding
Solid Fuel-Burning Appliance
Demolition
Insulation

Electrical

Class A — Master Electrician
Class B — Journeyman Electrician
Class C — Systems Contractor
Class D — Systems Technician
Electrical/Systems Business License

Plumbing & Gas Fitting

Master Plumber
Journeyman Plumber
Apprentice Plumber
Plumbing Corporation or Partnership
Plumbing Inspector (Journeyman or Master)
Master Gas Fitter
Journeyman Gas Fitter
Apprentice Gas Fitter
Gasfitting Corporation or Partnership
Gasfitting Inspector (Journeyman or Master)
Liquefied Petroleum Gas Installer
Limited Liquefied Petroleum Gas Installer

Asbestos & Lead

Asbestos Contractor
Asbestos Supervisor
Asbestos Worker
Asbestos Inspector
Asbestos Management Planner
Asbestos Project Designer
Asbestos Project Monitor
Deleading Contractor
Deleader-Supervisor
Deleader-Worker
Lead-Safe Renovation Contractor
Lead-Safe Renovator-Supervisor

Highway Prequalification

Bridge — Construction, Culverts, Deck Repairs, Joints
Highway — Construction, Bike Paths, Sidewalk and Curbing, Lighting
Pavement — Surfacing, Milling and Cold Planing, Reclamation, Markings
Traffic Signals and Intelligent Transportation Systems
Electrical — All Types (Including Maintenance)
Marine Construction and Dredging
Sewer and Water
Guard Rail and Fencing
Signing — Structural and Non-Structural
Demolition
Landscaping and Tree Planting
Hazardous Waste Remediation and Transportation
Dam Construction
Pump Stations
Salt Marsh and Wetland Restoration

Northeast region guide

Browse all Northeast jurisdictions for comparison.

Contractors guide

Cross-state guidance for contractors evaluating new jurisdictions.

Regulators guide

Cross-state guidance for comparing regulatory models and agency structures.

Neighboring jurisdictions with reciprocity ties:

New Hampshire

Electrical reciprocity with Massachusetts for both Master and Journeyman licenses.

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Territories and DC

At a glance

Frequently asked questions

Start with your goal

Is licensure triggered?

Find the right regulator

Application and renewal details

Reciprocity direction

Special considerations

Readiness checklist

Navigation

Construction work regulated

Common determination scenarios

Who regulates construction

Requirements

Reciprocal agreements

Types of licenses

See also

Northeast region guide

Contractors guide

Regulators guide

New Hampshire

​At a glance

​Frequently asked questions

​Start with your goal

Is licensure triggered?

Find the right regulator

Application and renewal details

Reciprocity direction

​Special considerations

​Readiness checklist

​Navigation

​Construction work regulated

​Common determination scenarios

​Who regulates construction

​Requirements

​Reciprocal agreements

​Types of licenses

​See also

Northeast region guide

Contractors guide

Regulators guide

New Hampshire

At a glance

Frequently asked questions

Start with your goal

Special considerations

Readiness checklist

Navigation

Construction work regulated

Common determination scenarios

Who regulates construction

Requirements

Reciprocal agreements

Types of licenses

See also