Maine

Maine does not require a general contractor license. Instead, it regulates individual trades — plumbing, electrical, asbestos, lead abatement, and underground oil tank work — at the state level through separate agencies. Highway contractors face a DOT prequalification gate on contracts over $600,000.

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 Maine is to understand that there is no general contractor gate — regulation is trade-specific.

Signal	Value
General contractor license	Not required at the state level
Plumbing and electrical	State license required for all work
Asbestos and lead abatement	State license required
Underground oil tank work	State certification required
Highway prequalification trigger	DOT contracts over $600,000
Reciprocity model	Electrical only; board-specific

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

Does Maine require a state license for general contractors?

No. Maine does not require a general contractor license at the state level. If your project involves only general construction with no regulated trade component, no state credential is needed. Check local jurisdiction requirements separately. See Construction work regulated.

What trades require a state license in Maine?

Plumbing and electrical work always require state licenses regardless of contract value. Asbestos abatement, lead abatement, and underground oil storage tank installation and removal each have separate certification paths through the Department of Environmental Protection. See Construction work regulated.

Where do I go to get a plumbing or electrical license?

Both plumbing and electrical licensing are handled by the Office of Professional and Occupational Regulation (OPOR) under the Department of Professional and Financial Regulation. Contact them at (207) 624-8603. See Who regulates construction.

How much does it cost to get licensed as a plumber or electrician?

For plumbers: exam application fee is $25, Master or Journeyman license fee is $200, and background check is $21. Biennial renewal is $200. For electricians: application fee is $25, Master license is $150, Journeyman is $80, and background check is $21. Biennial renewal matches the license fee. See Requirements for complete fee tables.

What are the experience requirements for a Master Plumber license?

You need at least 1 year or 2,000 hours as a licensed Journeyman, or at least 4 years or 8,000 hours as a licensed Trainee under a Master Plumber. See Requirements for all plumbing license tiers.

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

Reciprocity is limited to electrical licenses only. Master Electricians have reciprocity with New Hampshire and Vermont. Journeyman Electricians have reciprocity with Idaho, New Hampshire, North Dakota, Oregon, and Vermont. No reciprocity exists for plumbing, asbestos, lead, or underground tanks. See Reciprocal agreements.

When is DOT prequalification required for public works contracts?

DOT prequalification is required on contracts over $600,000. It covers six project categories: Bridge Construction, Highway Construction, Paving, Marine Construction, Buildings, and Traffic Signals and/or Lighting. See Requirements.

What are the requirements for asbestos or lead abatement work?

Asbestos contractors must be licensed and show evidence of employing certified abatement employees. A trade exam with a 70% passing score is required. Lead abatement contractors must employ a Maine-certified project supervisor and maintain an OSHA-compliant worker protection program. See Requirements for fees and training details.

Does Maine require a license for roofing work?

No. Roofing falls under general construction, which Maine does not regulate at the state level. However, if the roofing project involves electrical or plumbing components, those trade-specific licenses are still required. Check local jurisdiction requirements for any additional permits.

Does Maine require a license for residential work?

Not for general residential construction. Maine does not license general contractors. However, any plumbing, electrical, asbestos, lead, or underground tank work within a residential project still requires the appropriate state trade license. See Construction work regulated.

What underground oil tank certifications does Maine require?

Installers must pass an initial exam (80% passing score), complete an apprenticeship accumulating 1,000 experience points on supervised projects, and pass a final exam. Inspectors follow a separate single-exam track. Certificates are valid for two years with 8 hours of CE per cycle. See Requirements for fee tables.

How does Maine's licensing model compare to states with general contractor boards?

Maine is a trade-licensing-only state with no central contractor board. Regulation is split across 3 agencies covering 4 distinct areas (plumbing, electrical, environmental, and highway). This contrasts sharply with states like Connecticut (single department with 10 boards) or Alabama (8 separate agencies). See Who regulates construction.

How does Maine's $600,000 DOT prequalification threshold compare to other states?

The $600,000 threshold is relatively high compared to many states. Massachusetts triggers highway prequalification at $50,000, while some states require prequalification for all public works contracts. For cross-state comparison, see Licensing thresholds.

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

Maine regulates plumbing, electrical, asbestos, lead abatement, and underground oil tank work at the state level. General construction — including residential, commercial, and most specialty work — is not regulated at the state level and falls to local jurisdictions. See Construction work regulated.

Which agencies handle specialty trade licensing vs. general construction?

OPOR under the Department of Professional and Financial Regulation handles plumbing and electrical. The Department of Environmental Protection handles asbestos, lead, and underground tank certifications. The Department of Transportation manages highway prequalification. There is no general construction oversight agency. See Who regulates construction.

What are the fees across trades in Maine?

Fees vary significantly. Plumber and electrician licenses range from $80 to $200 with $25 application fees. Lead abatement ranges from $75 (worker) to $275 (contractor). Asbestos ranges from $50 (worker) to $650 (contractor). Underground tank installer initial exam is $200 with $150 certification. See Requirements for complete fee tables.

What license classifications does Maine use?

Plumbing offers Master, Journeyman, Journeyman-in-Training, and Trainee tiers. Electrical offers Master, Journeyman, Limited (8 specialty categories), Helper, and Apprentice tiers, plus Senior designations for those over 70. Lead and asbestos each have multiple certification tiers for workers, supervisors, contractors, and inspectors. See Types of licenses.

How does reciprocity work in Maine?

Reciprocity is narrow — electrical only. Master Electricians have reciprocity with 2 states (New Hampshire, Vermont). Journeyman Electricians have reciprocity with 5 states (Idaho, New Hampshire, North Dakota, Oregon, Vermont). No reciprocity exists for plumbing, environmental trades, or underground tanks. See Reciprocal agreements.

What exam requirements exist across the different trades?

Electricians must meet extensive hour and education requirements (up to 12,000 hours plus 576 hours of study for Master). Plumber exams follow similar tiered experience requirements. Asbestos requires a 70% trade exam score. Underground tank installers need 80% on both initial and final exams. See Requirements.

What are the renewal cycles across Maine's trades?

All plumbing and electrical licenses are biennial from the first licensure date. Lead and asbestos certifications require annual renewal with refresher courses. Underground tank certifications are biennial with 8 hours of CE per cycle. Highway prequalification is granted for 1 or 3 years. See Requirements.

How does Maine compare to other New England states in regulatory complexity?

Maine is among the least complex — it has no general contractor license at all. Compare this to Massachusetts (CSL plus HIC plus trade licenses across 6 agencies) or Connecticut (10 boards under DCP). Maine’s simplicity comes from delegating general construction to local jurisdictions. 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 the work lane — plumbing, electrical, environmental, or highway — to see if a state credential applies.

Find the right regulator

Use the regulator directory to route your question to the correct Maine agency.

Application and renewal details

Exams, fees, experience hours, continuing education, and renewal cycles for each trade.

Reciprocity direction

Find out which electrical license levels have reciprocity with other states.

Special considerations

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

Contractors
Regulators

If your project involves only general construction with no regulated trades, Maine does not require a state credential. Start by identifying whether your work includes a regulated trade.

Maine has no general contractor state license. General construction work is unregulated at the state level.
Plumbing and electrical work always require state licenses regardless of contract value.
Asbestos, lead abatement, and underground oil tank work each have separate certification paths through the Department of Environmental Protection.
Highway work requires DOT prequalification on contracts over $600,000.
All plumbing and electrical licenses renew biennially.

Readiness checklist

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

Identify the regulated trade

Determine whether the work involves plumbing, electrical, asbestos, lead abatement, underground tanks, or highway construction. General construction has no state gate.

Apply the right credential test

Plumbing and electrical always require a license. Highway work triggers DOT prequalification on contracts over $600,000. Other trades have their own certification paths.

Route to the correct regulator

Maine has 3 agencies covering 4 regulatory areas. Plumbing and electrical both sit under the Office of Professional and Occupational Regulation.

Confirm the requirement set

Confirm exams, experience hours, fees, renewal cycle, and reciprocity rules for the exact trade and license level before filing.

If you can identify the regulated trade, confirm the credential requirement, route to the correct agency, and verify the requirement set, you have the minimum package needed for a Maine readiness check.

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

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

Construction work regulated

Maine does not regulate general contracting at the state level. Licensure is triggered by the type of trade work involved, not by contract value — except for highway prequalification.

Work lane	What triggers regulation
Plumbing	State license required for all plumbing work
Electrical	State license required for all electrical work
Asbestos abatement	State license required for all abatement work
Lead abatement	State license required for all abatement work
Underground oil tank installation and removal	State certification required
Highway / public works	DOT prequalification on contracts over $600,000

If your project involves only general construction with no regulated trade component, Maine does not require a state-level license. Check local jurisdiction requirements separately.

Common determination scenarios

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

Plumbing project

Route to the Office of Professional and Occupational Regulation. Determine whether you need a Master, Journeyman, Journeyman-in-Training, or Trainee license. Masters need at least 2,000 hours as a licensed Journeyman or 8,000 hours as a licensed Trainee under a Master Plumber.

Electrical project

Route to the Office of Professional and Occupational Regulation. Master Electricians need 4,000 hours as a Journeyman or 12,000 hours in electrical installations, plus 576 hours of approved study. Check reciprocity if you already hold a license in New Hampshire or Vermont.

Asbestos or lead abatement

Route to the Department of Environmental Protection. Contractors must employ a certified project supervisor and maintain an OSHA-compliant worker protection program. Workers and supervisors each need separate certifications with their own training requirements.

Underground oil tank work

Route to the Board of Underground Storage Tank Installers under DEP. Installers must pass an initial exam, complete an apprenticeship accumulating 1,000 experience points, and pass a final exam. Inspectors follow a separate certification track.

General construction without regulated trades

No state license is required. Maine does not regulate general contracting at the state level. Check local jurisdiction requirements for permits and registrations.

Who regulates construction

Maine regulates construction trades through 3 state agencies covering 4 distinct regulatory areas. Use this directory to find the agency that owns the lane you need.

Highway prequalification — Department of Transportation

16 State House Station, Augusta, ME 04333-0016Phone: (207) 624-3000Website: maine.gov/dot/doing-business/contractor-prequalification

Asbestos and lead abatement — Department of Environmental Protection

c/o Asbestos/Lead Certification Coordinator, 17 State House Station, Augusta, ME 04333-0017Phone: (207) 287-7688Website: maine.gov/dep

Underground oil storage tanks — Board of UST Installers (c/o DEP)

17 State House Station, 28 Tyson Drive, Augusta, ME 04333Phone: (207) 287-7688Website: maine.gov/dep/waste/index.html

Plumbing and electrical — Office of Professional and Occupational Regulation

Department of Professional and Financial Regulation, 35 State House Station, Augusta, ME 04333Phone: (207) 624-8603 | Fax: (207) 624-8637Website: maine.gov/pfr/professionallicensing

Requirements

Each Maine trade has its own application inputs, exams, fees, and renewal cycles. Expand the trade that applies to your situation. Fee tables are included in each section.

Plumbers

All plumbing licenses are valid for two years from the licensure date.

Requirement	Detail
Master Plumber experience	At least 1 year / 2,000 hours as a licensed Journeyman, or at least 4 years / 8,000 hours as a licensed Trainee under a Master Plumber
Journeyman experience	At least 2 years / 4,000 hours as a licensed Trainee under a Master Plumber, or 2,000 hours as a Journeyman-in-Training under a Master (within 4 years of JIT license date)
Journeyman-in-Training	1 year / 2 semesters at a Board-approved community college + pass the Journeyman Plumber exam
Renewal cycle	Biennial from first licensure date

License type	Exam application fee	License fee	Background check	Biennial renewal
Master Plumber	$25	$200	$21	$200
Journeyman	$25	$200	$21	$200
Journeyman-in-Training	$25	$100	$21	N/A
Trainee	$25	$100	$21	$100

Electricians

All electrical licenses are valid for two years from the licensure date.

Requirement	Detail
Master experience	At least 4,000 hours as a Journeyman, or at least 12,000 hours in electrical installations + 576 hours of Board-approved study (450 required hours including 45 hours on current NEC + 126 degree-related hours)
Journeyman experience	At least 8,000 hours as a licensed apprentice or helper + 576 hours of Board-approved study (225 required hours including 45 hours on current NEC + 351 elective hours); alternative paths available for accredited program graduates
Limited categories	Requirements vary by specialty (Water Pumps, Outdoor Signs, Gasoline Dispensing, Traffic Signals, House Wiring, Refrigeration, Low Energy, Crane Technician)
Renewal cycle	Biennial from licensure date

License type	License fee	Application fee	Background check	Biennial renewal
Master Electrician	$150	$25	$21	$150
Senior Master (over 70)	$20	$25	$21	$20
Limited Electrician	$100	$25	$21	$100
Senior Limited (over 70)	$20	$25	$21	$20
Journeyman Electrician	$80	$25	$21	$80
Senior Journeyman (over 70)	$20	$25	$21	$20

Lead Abatement

Requirement	Detail
Contractor	Must be licensed, employ a Maine-certified project supervisor, and maintain an up-to-date OSHA-compliant worker protection program
Project supervisor	1 year experience as a lead abatement worker, or 2 years in building trades / asbestos abatement / environmental tech + completion of a project supervisor course
Worker	Must complete a lead worker course
Renewal	8-hour refresher course required before renewal of any license

Certification type	Application and annual renewal fee
Lead Abatement Worker	$75
Lead Abatement Project Supervisor	$125
Lead Abatement Contractor	$275

Asbestos

Contractors must be licensed and show evidence of employing one or more certified abatement employees.

Requirement	Detail
Exam	Trade examination required; passing score of 70%
Processing time	Approximately 2 weeks

Certification type	Certification and renewal fee	Application and renewal fee
Asbestos Abatement Worker	$50	$50
Asbestos Abatement Project Supervisor	$100	$100
Asbestos Abatement Contractor	N/A	$650

Underground Oil Storage Tanks

Installer certification requires passing an initial exam, completing an apprenticeship (1,000 experience points on mandatory and elective projects under certified installers), and passing a final exam. Certificates are valid for two years and require 8 hours of Board-approved continuing education per cycle. Inspector certification follows a separate single-exam track.

Requirement	Detail
Installer initial exam	Passing score of 80% required
Apprenticeship	1,000 experience points on supervised projects
Installer final exam	Required to complete certification
Inspector exam	Single examination for certification
Inspector additional credentials	Must demonstrate certifications for cathodic protection testing or specific leak detection equipment brands
Renewal cycle	Biennial; 8 hours CE required per cycle

Installer fees:

Fee type	Amount
Initial exam (includes study guide)	$200
Variance to apprenticeship	$200
Annual apprentice renewal	$150
Final examination	$250
Certification	$150
Biennial recertification	$150

Inspector fees:

Fee type	Amount
Examination (includes study guide)	$250
Certification	$150
Recertification	$150

Highway Prequalification

DOT prequalification covers six project categories: Bridge Construction, Highway Construction, Paving, Marine Construction, Buildings, and Traffic Signals and/or Lighting.

Requirement	Detail
Project history	Last six completed projects plus all contracts currently in progress
Bonding	Statements from bonding company on individual project and aggregate capacity
Insurance	Experience Rating Modifier statement required
Safety	Current safety plan in electronic format + Supplemental Safety Questionnaire
EEO/Civil Rights	Supplemental EEO/Civil Rights Questionnaire required
Term	1 year or 3 years at the discretion of the Prequalifications Review Board; may also be granted for individual specific projects

Reciprocal agreements

Maine’s reciprocity is limited to electrical licenses. No statewide reciprocity arrangement exists for plumbing, asbestos, lead abatement, or underground tank work.

Reciprocity in Maine applies only to electrical licenses and varies by license level. Master and Journeyman licenses have different reciprocal state lists.

Board	Reciprocal states	Coverage
Master Electricians	New Hampshire, Vermont	2 states
Journeyman Electricians	Idaho, New Hampshire, North Dakota, Oregon, Vermont	5 states

Types of licenses

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

Plumbing

Master Plumber
Journeyman Plumber
Journeyman-in-Training
Trainee

Electrical

Master Electrician
Senior Master Electrician (over 70 years of age)
Journeyman Electrician
Senior Journeyman Electrician (over 70 years of age)
Limited Electrician / Senior Limited Electrician (over 70 years of age):
- Water Pumps
- Outdoor Signs (Including Sign Lighting)
- Gasoline Dispensing
- Traffic Signals (Including Outdoor Lighting)
- House Wiring
- Refrigeration
- Low Energy
- Crane Technician
Helper Electrician
Apprentice Electrician

Lead Abatement

Design Consultant
Lead Consultant
Contractor
Lead Training Provider
Project Supervisor
Worker
Inspector
Risk Assessor

Asbestos

Analytical Lab
Training Provider
Contractor
Inspector
Supervisor
Worker
Design Consultant
Management Planner
Air Monitor / Bulk Analyst
Air Analyst
Consultant

Underground Oil Storage Tanks

Underground Storage Tank Inspector
Underground Storage Tank Installer

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

Master and Journeyman Electrician reciprocity with Maine.

Vermont

Master and Journeyman Electrician reciprocity with Maine.

Start Here

Northeast

South

Midwest

West

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

Vermont

​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

Vermont

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