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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.

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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.
SignalValue
General contractor licenseNot required at the state level
Plumbing and electricalState license required for all work
Asbestos and lead abatementState license required
Underground oil tank workState certification required
Highway prequalification triggerDOT contracts over $600,000
Reciprocity modelElectrical only; board-specific

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Frequently asked questions

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

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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.

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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.
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.

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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.

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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 laneWhat triggers regulation
PlumbingState license required for all plumbing work
ElectricalState license required for all electrical work
Asbestos abatementState license required for all abatement work
Lead abatementState license required for all abatement work
Underground oil tank installation and removalState certification required
Highway / public worksDOT 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.

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Common determination scenarios

If you are trying to figure out where to start, expand the scenario that is closest to your situation.
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.
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.
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.
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.
No state license is required. Maine does not regulate general contracting at the state level. Check local jurisdiction requirements for permits and registrations.

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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.
16 State House Station, Augusta, ME 04333-0016Phone: (207) 624-3000Website: maine.gov/dot/doing-business/contractor-prequalification
c/o Asbestos/Lead Certification Coordinator, 17 State House Station, Augusta, ME 04333-0017Phone: (207) 287-7688Website: maine.gov/dep
17 State House Station, 28 Tyson Drive, Augusta, ME 04333Phone: (207) 287-7688Website: maine.gov/dep/waste/index.html
Department of Professional and Financial Regulation, 35 State House Station, Augusta, ME 04333Phone: (207) 624-8603 | Fax: (207) 624-8637Website: maine.gov/pfr/professionallicensing

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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.
RequirementDetail
Master Plumber experienceAt 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 experienceAt 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-Training1 year / 2 semesters at a Board-approved community college + pass the Journeyman Plumber exam
Renewal cycleBiennial from first licensure date
License typeExam application feeLicense feeBackground checkBiennial renewal
Master Plumber$25$200$21$200
Journeyman$25$200$21$200
Journeyman-in-Training$25$100$21N/A
Trainee$25$100$21$100
All electrical licenses are valid for two years from the licensure date.
RequirementDetail
Master experienceAt 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 experienceAt 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 categoriesRequirements vary by specialty (Water Pumps, Outdoor Signs, Gasoline Dispensing, Traffic Signals, House Wiring, Refrigeration, Low Energy, Crane Technician)
Renewal cycleBiennial from licensure date
License typeLicense feeApplication feeBackground checkBiennial 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
RequirementDetail
ContractorMust be licensed, employ a Maine-certified project supervisor, and maintain an up-to-date OSHA-compliant worker protection program
Project supervisor1 year experience as a lead abatement worker, or 2 years in building trades / asbestos abatement / environmental tech + completion of a project supervisor course
WorkerMust complete a lead worker course
Renewal8-hour refresher course required before renewal of any license
Certification typeApplication and annual renewal fee
Lead Abatement Worker$75
Lead Abatement Project Supervisor$125
Lead Abatement Contractor$275
Contractors must be licensed and show evidence of employing one or more certified abatement employees.
RequirementDetail
ExamTrade examination required; passing score of 70%
Processing timeApproximately 2 weeks
Certification typeCertification and renewal feeApplication and renewal fee
Asbestos Abatement Worker$50$50
Asbestos Abatement Project Supervisor$100$100
Asbestos Abatement ContractorN/A$650
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.
RequirementDetail
Installer initial examPassing score of 80% required
Apprenticeship1,000 experience points on supervised projects
Installer final examRequired to complete certification
Inspector examSingle examination for certification
Inspector additional credentialsMust demonstrate certifications for cathodic protection testing or specific leak detection equipment brands
Renewal cycleBiennial; 8 hours CE required per cycle
Installer fees:
Fee typeAmount
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 typeAmount
Examination (includes study guide)$250
Certification$150
Recertification$150
DOT prequalification covers six project categories: Bridge Construction, Highway Construction, Paving, Marine Construction, Buildings, and Traffic Signals and/or Lighting.
RequirementDetail
Project historyLast six completed projects plus all contracts currently in progress
BondingStatements from bonding company on individual project and aggregate capacity
InsuranceExperience Rating Modifier statement required
SafetyCurrent safety plan in electronic format + Supplemental Safety Questionnaire
EEO/Civil RightsSupplemental EEO/Civil Rights Questionnaire required
Term1 year or 3 years at the discretion of the Prequalifications Review Board; may also be granted for individual specific projects

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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.
BoardReciprocal statesCoverage
Master ElectriciansNew Hampshire, Vermont2 states
Journeyman ElectriciansIdaho, New Hampshire, North Dakota, Oregon, Vermont5 states

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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.
  • Master Plumber
  • Journeyman Plumber
  • Journeyman-in-Training
  • Trainee
  • 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
  • Design Consultant
  • Lead Consultant
  • Contractor
  • Lead Training Provider
  • Project Supervisor
  • Worker
  • Inspector
  • Risk Assessor
  • Analytical Lab
  • Training Provider
  • Contractor
  • Inspector
  • Supervisor
  • Worker
  • Design Consultant
  • Management Planner
  • Air Monitor / Bulk Analyst
  • Air Analyst
  • Consultant
  • Underground Storage Tank Inspector
  • Underground Storage Tank Installer

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See also

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.