Maryland Contractor Licenses: Updated Requirements Guide
Maryland regulates contractors through a mix of statewide boards and local authorities. Electricians, plumbers/gas fitters, HVACR professionals, home improvement contractors, and numerous specialties are licensed or registered at the state level. Some work, particularly commercial and new home construction, may also require a county-issued construction license obtained from the local Clerk of the Circuit Court.
This guide spotlights several common licenses and jurisdictions to help you get oriented; we update it periodically. You will find a dedicated State-Level Licenses section near the beginning, followed by per-trade sections that explain how local requirements fit in. Wherever local registration or a county construction license may apply, we point you to the official portal to confirm forms, fees, and scope.
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Overview of Maryland Contractor Licensing
Contractor and trade regulation in Maryland is managed by multiple authorities. The Maryland Department of Labor’s Division of Occupational and Professional Licensing oversees statewide licensing boards for electricians, plumbers and gas fitters, HVACR contractors, elevator personnel, and the Maryland Home Improvement Commission (MHIC). Separate state agencies regulate environmental and life-safety specialties such as well drillers, waterworks operators, asbestos/lead paint contractors, and fire sprinkler contractors.
Alongside these statewide programs, counties issue construction licenses for commercial and new-home work through the Clerks of the Circuit Court. In practice, a contractor may need a state license (for trade competency and scope) and a local business/construction license to operate in a given county.
Key regulators include the Maryland State Board of Electricians, Maryland Board of Plumbing, HVACR Contractors Board, MHIC, the Office of the Attorney General’s Home Builder Registration Unit, the Maryland Department of the Environment’s environmental boards, the Office of the State Fire Marshal, and the Maryland Elevator Safety Review Board. Central information is available at the Department of Labor licensing hub.
Browse all Maryland contractor license practice tests →
State-Level Licenses in Maryland
State-level licensing means your credential is issued by a Maryland state board or agency and recognized statewide for its defined scope. In Maryland, electricians, plumbers/gas fitters, HVACR contractors, home improvement contractors, new home builders, and numerous specialties (e.g., well drillers, fire sprinkler contractors, asbestos/lead paint contractors, elevator trades, and waterworks operators) are regulated at the state level.
Below are the primary state-issued licenses and registrations organized by trade. Always review the linked official pages for the most current forms, fees, and rules.
State-Level Electrician Licenses
Master Electrician License
Authority: Maryland State Board of Electricians — https://labor.maryland.gov/license/elec/
Scope: Full electrical contracting authority statewide; responsible for permits, supervision, and code compliance.
Requirements: At least 7 years of regular and principal experience performing electrical services under a Maryland licensed master electrician or similarly qualified governmental employee; up to 3 years of credit may be allowed for formal electrical study or training comparable to experience.
Examination: Maryland Master Electrician Examination (PSI). Computer-based, open book (NEC). 90 questions, 240 minutes, 70% passing. Topics include electrical theory, NEC application, wiring methods, load calculations, and Maryland electrical law/business practices. Retake policy: wait at least 30 days before retesting; subsequent retests may require 60 days; exam fee due each attempt.
Fees: Application $25.00; Exam $65.00; Initial license $25.00; Renewal $31.50; Late penalty $63.00.
Insurance: Required. General liability minimum $300,000 and property damage $100,000. Umbrella-only coverage is not acceptable.
Renewal: Biennial; 7 hours of continuing education on NEC updates and Maryland law per Board requirements.
Source: License Requirements
Journeyperson Electrician License
Authority: Maryland State Board of Electricians — https://labor.maryland.gov/license/elec/
Requirements: At least 4 years of regular and principal electrical experience under a licensed master; the experience and the journeyperson exam may be waived if you complete a Board-approved apprenticeship with at least 576 classroom hours and 8,000 on-the-job hours.
Examination: Maryland Journeyperson Electrician Examination (PSI). Computer-based, open book (NEC). 70 questions, 210 minutes, 70% passing. Topics include NEC requirements, wiring methods, safety, calculations, and Maryland statutes. Retake policy mirrors master-level waits and fees.
Fees: Application $18.50; Exam $65.00; Initial license $18.50; Renewal $18.50; Late penalty $63.00.
Insurance: Not required at the individual journeyperson level. Contracting businesses must meet master-level insurance requirements.
Renewal: Biennial; 10 hours of continuing education focused on electrical code updates and safety (portion classroom-based per Board guidance).
Source: License Requirements
Apprentice Electrician License
Authority: Maryland State Board of Electricians — https://labor.maryland.gov/license/elec/
Requirements: No prior experience required. Authorizes assisting with electrical services under the direction and control of a licensed master or journeyperson while training toward journeyperson status. Separate registration with the Maryland Apprenticeship and Training Council is required for registered apprenticeship credit.
Examination: Not required for apprentice licensure.
Fees: Application $12.00; Initial license $12.00; Renewal $12.00; Late penalty $63.00.
Insurance: Not required for apprentices; insurance applies to master-level licensees.
Renewal: Biennial.
Source: Apprentice Application Portal
Low-Voltage Electrician License
Authority: Maryland State Board of Electricians — https://labor.maryland.gov/license/elec/
Requirements: At least 3 years of low-voltage electrical experience. Statute references pathways with 432 classroom hours and 6,000 hours of low-voltage experience for certain applicants; the Board adopts detailed regulations. Some applicants may qualify for waiver of experience and examination based on documented low-voltage experience and training.
Examination: Maryland Low-Voltage Electrician Examination (Board-administered). Topics include NEC limited-energy provisions and Maryland-specific rules. Question count, duration, and passing score are set by the Board.
Fees: Application $25.00; Initial license $25.00; Renewal $31.50; Late penalty $63.00.
Insurance: Required. General liability minimum $300,000 and property damage $100,000.
Renewal: Biennial.
Contact the Maryland State Board of Electricians to confirm examination logistics (vendor, scheduling) and any additional fee details before applying.
Source: Enabling Statute
State-Level Plumbing Licenses
Apprentice Plumber/Gas Fitter License
Authority: Maryland Board of Plumbing — https://labor.maryland.gov/license/pl/
Requirements: Minimum age 16. Registration as an apprentice under a licensed master plumber/gas fitter. Apprentices working under programs registered with the Maryland Apprenticeship and Training Program must also hold an active apprentice license for hours to count toward journeyman qualification.
Examination: Not required for apprentice licensure.
Fees: Application $18.50; Initial license $18.50; Renewal $18.50.
Insurance: Not required at the apprentice level; insurance applies to master-level contractors.
Renewal: Biennial.
Source: License Requirements
Journeyman Plumber/Gas Fitter License
Authority: Maryland Board of Plumbing — https://labor.maryland.gov/license/pl/
Requirements: Hold an apprentice license for at least 4 years and complete 7,500 hours of supervised training, plus a 32-hour backflow prevention device testing course.
Examination: Maryland Journeyman Plumber/Gas Fitter Examination (PSI). Written exam, 80 questions, 180 minutes, 75% passing. Topics include the Maryland Plumbing Code and adopted IPC provisions, pipe sizing, fixtures, drainage/venting, water supply, gas piping, safety, and backflow prevention. Retake requires new PSI registration and fee; Board reports note challenging pass rates.
Fees: Application $43.50; Exam $65.00; Initial license $43.50; Renewal $43.50.
Insurance: Not required at journeyman level; master-level contractors must carry general liability and property damage insurance.
Renewal: Biennial.
Source: License Requirements | Exam Information
Master Plumber/Gas Fitter License
Authority: Maryland Board of Plumbing — https://labor.maryland.gov/license/pl/
Requirements: Hold a journeyman license for at least 2 years and complete 3,750 hours of supervised plumbing services; complete the 32-hour backflow prevention device testing course. The Board may credit up to 1,500 hours of accredited plumbing school study toward journeyman experience.
Examination: Maryland Master Plumber/Gas Fitter Examination (PSI). 100 questions, 240 minutes, 75% passing. Topics include advanced plumbing design, code compliance, gas piping, backflow prevention, safety, and Maryland statutes.
Fees: Application $87.50; Exam $65.00; Initial license $87.50; Renewal $87.50.
Insurance: Required for contractors: general liability $300,000 and property damage $100,000 (including completed operations).
Renewal: Biennial.
Journeyman Natural Gas Fitter License
Authority: Maryland Board of Plumbing — https://labor.maryland.gov/license/pl/
Requirements: 3,750 working hours as an apprentice natural gas fitter over at least 2 years under a licensed master gas fitter or master plumber; completion of an approved gas fitting training program.
Examination: PSI-administered journeyman natural gas fitter exam; 75% passing. Topics include gas piping systems, combustion air, venting, safety, and Maryland gas rules.
Fees: Application $68.50; Exam $65.00; Initial license $68.50; Renewal $31.50.
Insurance: Not required at journeyman level; master-level gas fitters must carry insurance.
Renewal: Biennial.
Source: License Requirements
Master Natural Gas Fitter License
Authority: Maryland Board of Plumbing — https://labor.maryland.gov/license/pl/
Requirements: Either hold a current master gas fitter license from Baltimore City, Baltimore County, or WSSC; or have at least 4 years of experience plus an approved gas fitting training program. Alternatively, an HVACR master or master restricted licensee with at least 2 years of gas fitting experience as a journeyman under a qualified master may qualify subject to examination.
Examination: PSI-administered master natural gas fitter exam; 70% passing. Topics include advanced gas piping design, appliances, safety, and Maryland gas codes.
Fees: Application $150.50; Exam $25.00; Initial license $150.50; Renewal $43.50.
Insurance: Required. General liability $300,000 and property damage $100,000.
Renewal: Biennial.
Source: Maryland OneStop Portal
State-Level HVAC Licenses
Apprentice HVACR License
Authority: Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration Contractors — https://labor.maryland.gov/license/hvacr/
Requirements: Entry-level registration; work only under the direction and control of a licensed HVACR contractor. Completing an approved apprenticeship may qualify graduates for journeyman licensure without exam if they apply within 2 years.
Examination: Not required for apprentice licensure.
Fees: Application $12.00; Initial license $12.00; Renewal $12.00.
Insurance: Not required at apprentice level.
Renewal: Biennial.
Source: Apply & Forms
Journeyman HVACR License
Authority: Maryland HVACR Contractors Board — https://labor.maryland.gov/license/hvacr/
Requirements: Hold an apprentice license for at least 4 years and complete at least 6,000 hours of supervised HVACR training. Approved apprenticeship graduates may qualify for licensure without exam if they apply within 2 years of graduating.
Examination: PSI computer-based exam; 100 questions; 240 minutes; 70% passing. Topics include electrical knowledge, motors/controls, piping, refrigeration and air conditioning, heating, air distribution, and safety.
Fees: Application $25.00; Exam $150.00; Initial license $25.00; Renewal $25.00.
Insurance: Not required for journeymen; contractors must carry insurance.
Renewal: Biennial.
Source: License Requirements
Journeyman Restricted HVACR License
Authority: Maryland HVACR Contractors Board — https://labor.maryland.gov/license/hvacr/
Requirements: At least 3 years as an apprentice and 1,875 hours of training in HVACR services during that period in a restricted area (e.g., forced air, hydronic, ventilation, air conditioning, or refrigeration).
Examination: PSI exam; 50 questions; 120 minutes; 70% passing. Content focuses on the chosen restricted category and safety.
Fees: Application $25.00; Exam $50.00; Initial license $25.00; Renewal $25.00.
Insurance: Not required for restricted journeymen.
Renewal: Biennial.
Source: Maryland OneStop Portal
Master HVACR Contractor License
Authority: Maryland HVACR Contractors Board — https://labor.maryland.gov/license/hvacr/
Requirements: Hold journeyman status and be regularly and principally employed in all areas of HVACR services for at least 3 years under the direction and control of a master HVACR contractor, including 1,875 hours in the year immediately prior to application.
Examination: PSI exam; 100 questions; 240 minutes; 70% passing. Comprehensive coverage of HVACR systems design/installation, controls, safety, and Maryland law.
Fees: Application $94.50; Exam $150.00; Initial license $94.50; Renewal $94.50.
Insurance: Required. General liability $300,000 and property damage $100,000.
Renewal: Biennial.
Source: License Requirements
Limited HVACR Contractor License
Authority: Maryland HVACR Contractors Board — https://labor.maryland.gov/license/hvacr/
Requirements: Hold journeyman status and be regularly and principally employed under a licensed HVACR master for at least 2 years, including 1,000 hours of work in the year before application. Scope covers maintenance and repair of selected systems.
Examination: PSI exam; 50 questions; 120 minutes; 70% passing.
Fees: Application $94.50; Exam $150.00; Initial license $94.50; Renewal $94.50.
Insurance: Required. General liability $300,000 and property damage $100,000.
Renewal: Biennial.
Source: Apply & Forms
State-Level General Contractor Licenses
Home Improvement Contractor License (MHIC)
Authority: Maryland Home Improvement Commission — https://labor.maryland.gov/license/mhic/
Scope: Residential home improvement contracting statewide, including remodeling, repairs, residential roofing, decks, and pools (home improvement category).
Requirements: At least 2 years of experience in home improvement work, construction, and/or related education. Up to 1 year of experience may be substituted with vocational training or supervisory/management experience. Financial solvency and trade name registration are part of application review.
Examination: Maryland Home Improvement Contractor exam (PSI). Open book with approved references. 55 questions; 150 minutes; 70% passing. Topics include MHIC law and regulations, contracts, business practices, consumer protection, and lien rules. Retake permitted after 30 days; results valid for 2 years for licensure.
Fees: Application/Initial/Renewal $281.25; Exam $63.00; Guaranty Fund initial $100.00; Guaranty Fund renewal $175.00; Processing fee $22.50.
Insurance: Required. General liability coverage; current practice requires at least $500,000, with MHIC named as certificate holder.
Renewal: Biennial.
Source: License Requirements | Exam Information
New Home Builder Registration
Authority: Home Builder Registration Unit, Office of the Attorney General — https://oag.maryland.gov/i-need-to/new-home-builder
Scope: Builders of new homes in Maryland must register; focuses on disclosures, consumer deposits (escrow or warranty), and compliance with the Home Builder Registration Act.
Requirements: Disclosure of principals, jurisdictions with similar registrations, and any disciplinary history or legal proceedings. Provide liability carrier/policy details and elect escrow or warranty arrangements for deposits.
Examination: None.
Fees: Initial $800.00; Renewal scaled by permits: 10 or fewer $400.00; 11–74 $800.00; 75 or more $1,200.00.
Insurance: General liability required; escrow or warranty for deposits as specified.
Renewal: Biennial.
Source: Official Program Page
State-Level Roofing Licenses
Home Improvement Contractor License (Residential Roofing Work)
Authority: Maryland Home Improvement Commission — https://labor.maryland.gov/license/mhic/
Scope: Covers residential roofing, re-roofing, and roof repairs as home improvement work.
Requirements: At least 2 years of home improvement/construction experience and/or approved education as described under MHIC contractor licensing.
Examination: MHIC contractor exam (PSI). Open book, 55 questions, 150 minutes, 70% passing. Roofing is included within the broader home improvement law/business exam.
Fees: Application/Initial/Renewal $281.25; Exam $63.00; Guaranty Fund initial $100.00; Guaranty Fund renewal $175.00; Processing fee $22.50.
Insurance: Required. General liability (current practice: at least $500,000) with MHIC as certificate holder.
Renewal: Biennial.
Source: License Requirements
State-Level Specialty Licenses
Master Well Driller License (General Category)
Authority: State Board of Well Drillers, Maryland Department of the Environment (MDE) — Board of Well Drillers
Requirements: For general, geotechnical, or water supply categories: at least 2 years as a journeyman well driller in the same category or 7 years practicing well drilling, with at least 2 of the last 3 years operating equipment for the category sought. Hazardous waste/monitoring-site operations certification is required in general or geotechnical categories. The Board may substitute up to 2 years of experience with specified education.
Examination: Board-developed written exam (offered up to 6 times per year); 70% passing.
Fees: Application $75.00; Exam $75.00; Initial license $150.00; Renewal $200.00; Late penalty $200.00.
Insurance: Required performance bond and contractor liability insurance.
Renewal: Biennial; 20 hours of continuing education.
Source: COMAR 26.05.01.04
Journeyman Well Driller License (General Category)
Authority: State Board of Well Drillers (MDE) — Board of Well Drillers
Requirements: 3 years as an apprentice well driller in the category sought, or equivalent well drilling experience with at least 2 of the last 3 years operating equipment for the category.
Examination: Board-written exam; 70% passing.
Fees: Application $75.00; Exam $75.00; Initial license $100.00; Renewal $150.00; Late penalty $200.00.
Insurance: Bonding and liability insurance per COMAR 26.05.02.05.
Renewal: Biennial; 20 hours of continuing education.
Source: COMAR Regulations (PDF)
Water Pump Installer License
Authority: State Board of Well Drillers (MDE) — Environmental Boards Overview
Requirements: Related pump installation/service experience meeting the apprentice/journeyman/master tiers established in COMAR 26.05.01.04. Specific education in water pump technology may substitute for up to 2 years of experience at the Board’s discretion.
Examination: Board examination; 70% passing.
Fees: Application $75.00; Exam $75.00.
Insurance: Bond and liability insurance required.
Renewal: Biennial; 20 hours of CE.
Contact the State Board of Well Drillers to confirm initial/renewal fee amounts and renewal scheduling before applying.
Fire Sprinkler Contractor License (Class IIIc)
Authority: Office of the State Fire Marshal, Maryland Department of State Police — Sprinkler Contractors
Requirements: At least 3 years of business experience in sprinkler work appropriate to the class and employ a Designated Qualified Individual with NICET Level III+ in Water-Based Systems Layout or a Maryland PE in fire protection.
Examination: No state exam for the company license; qualification is through the Designated Qualified Individual’s NICET/PE credentials.
Fees: Application/Initial $300.00; Renewal $200.00; Late penalty $300.00.
Insurance: Required. General liability minimum $1,000,000 with the State Fire Marshal as certificate holder and 30-day cancellation notice.
Renewal: Biennial; maintain NICET/PE credentials and NFPA compliance.
Source: Application & Requirements (PDF)
Elevator Contractor License
Authority: Maryland Elevator Safety Review Board — https://labor.maryland.gov/license/elev/
Requirements: At least 5 years of work experience in the elevator industry (construction, maintenance, service, or repair). Provide CV, W-2s/employer verification, and business registration (for entities).
Examination: Not required for the contractor license.
Fees: Application $25.00; Initial license $275.00; Renewal $300.00.
Insurance: Required. General liability $1,000,000 and property damage $500,000; worker’s compensation as applicable.
Renewal: Biennial.
Source: Contractor Application (PDF)
Elevator Mechanic License
Authority: Maryland Elevator Safety Review Board — https://labor.maryland.gov/license/elev/
Requirements: At least 3 years of recent, active elevator industry experience (construction, maintenance, service/repair) verified by employers, or completion of a nationally recognized apprenticeship/training program (e.g., NEIEP or NAEC CET).
Examination: PSI-administered Elevator Mechanic exam; 70% passing. Topics include elevator safety codes, mechanical/electrical systems, and inspection procedures.
Fees: Application $25.00; Initial license $175.00; Renewal $200.00.
Insurance: Not required for individual mechanics; contractor employers must carry required insurance.
Renewal: Biennial; 8 hours of continuing education.
Source: Maryland OneStop Portal
Asbestos Contractor License
Authority: Maryland Department of the Environment, Asbestos Division — Asbestos for Contractors
Requirements: Businesses that disturb friable asbestos must be licensed. Applicants complete EPA-accredited or state-approved asbestos training (worker/supervisor), demonstrate knowledge of safe practices, and pass the Maryland-recognized third-party exam. Proof of training and worker’s compensation coverage required.
Examination: Third-party exam recognized by MDE.
Fees: Application/Initial license $625.00.
Insurance: Worker’s compensation compliance and liability coverage as specified by MDE.
Renewal: Annual; refresher training required by regulation.
Source: Maryland OneStop Portal
Lead Paint Contractor Accreditation
Authority: Maryland Department of the Environment, Lead Poisoning Prevention Program — Lead Abatement Services
Requirements: Contractor accreditation requires completion of accredited training programs for the applicable discipline (workers, supervisors, inspectors, risk assessors, structural steel workers, training providers) and documentation of required experience for certain roles. MDE audits training providers and credentials.
Examination: Exams are administered by accredited training providers and evaluated by MDE.
Insurance: Maintain compliance with lead work practice standards; insurance expectations follow environmental contractor norms.
Renewal: Typically biennial; timely refresher courses required to maintain accreditation validity.
Contact MDE’s Lead Program for fee schedules and exact renewal intervals by discipline before applying.
Source: Maryland OneStop Portal
Waterworks and Waste System Operator Certification
Authority: Board of Waterworks and Waste Systems Operators (MDE) — Environmental Boards Overview
Requirements: Education and experience appropriate to the operator class sought across water treatment, distribution, wastewater treatment/collection, or industrial wastewater/pretreatment.
Examination: Board-approved examinations for each operator class covering treatment processes, distribution/collection operations, safety, and compliance.
Insurance: Not applicable to personal certification; insurance is handled at the facility or employer level.
Contact the Board to confirm current application fees, examination schedules, and renewal/CE requirements for your operator class.
Source: Maryland OneStop Portal
Electrician Licenses in Maryland
Statewide electrician licensing is handled by the Maryland State Board of Electricians (see State-Level Licenses above). In addition, some counties may require a separate county-issued business/construction license for certain commercial or new home projects, or local registration to pull permits. Confirm local requirements where you plan to work.
Local Licensing Requirements
Major Cities with Local Requirements:
- Clerks of the Circuit Court (county-level): County construction licensing issued by the Clerk may be required for commercial/new home projects in addition to your state electrician license. Verify whether your electrical contracting business needs a county construction license, insurance on file, and any local registration to pull permits. Registration information: https://labor.maryland.gov/license/oplinks.shtml
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
Plumbing Licenses in Maryland
Plumbing and gas fitting are licensed statewide by the Maryland Board of Plumbing (see State-Level Licenses above). Local authorities may additionally require a county construction/business license for commercial or new home work and may set registration steps to obtain local permits.
Local Licensing Requirements
Major Cities with Local Requirements:
- Clerks of the Circuit Court (county-level): County construction licenses can apply to commercial/new home plumbing work; confirm whether your plumbing/gas fitting firm must obtain a county construction license and file insurance at the county where work occurs. Registration information: https://labor.maryland.gov/license/oplinks.shtml
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
HVAC Licenses in Maryland
HVACR licensing is statewide under the HVACR Contractors Board (see State-Level Licenses above). Some counties also require a county construction license for commercial or new home work and may require business registration to pull mechanical permits. Separate from licensing, EPA Section 608 certification is a federal requirement for anyone who handles refrigerants.
Local Licensing Requirements
Major Cities with Local Requirements:
- Clerks of the Circuit Court (county-level): County construction licenses may be required for commercial/new home HVACR projects; confirm whether your company needs a county license and what insurance documentation must be filed locally, in addition to your state HVACR credential. Registration information: https://labor.maryland.gov/license/oplinks.shtml
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
📍 Maryland Uses Local Licensing
Some contractor licensing in Maryland is handled by individual cities and counties rather than a single statewide board. Application forms, insurance minimums, exams, and renewal cycles can vary from one jurisdiction to another.
What this means for you:
- Contact the specific city or county where you will perform work to confirm current requirements.
- Expect to maintain multiple licenses if you work across different municipalities.
- Insurance certificates may need to name each city/county individually.
- Renewal cycles and CE requirements vary — track each separately.
Use code-focused study materials that match the code editions enforced by the jurisdiction where you test or permit work.
General Contractor Licenses in Maryland
Residential remodeling and repair work is licensed statewide by the Maryland Home Improvement Commission (covered in State-Level Licenses). Builders of new homes register with the Office of the Attorney General. For commercial construction and new home construction activity at the county level, a separate construction license is issued by the local Clerk of the Circuit Court.
Construction License (Commercial and New Home Construction) (Local Jurisdiction)
Authority: Clerks of the Circuit Court (county-level) — https://labor.maryland.gov/license/oplinks.shtml
Scope: County-issued construction license for entities performing commercial work, new home construction, paving/curbing, or excavating in the county where work is performed.
Requirements: Any person or business performing covered work categories must obtain the appropriate construction license from the Clerk in the county of performance. Specific documentation (business registration, trade names, insurance certificates) is set by the county clerk and state law.
Examination: None specified for this business license.
Insurance: Set by county and state law. MHIC-licensed contractors do not need a county construction license for home improvement contracts, but may need one for commercial/agricultural work.
Contact the Clerk of the Circuit Court in the county where you will work to confirm application fees, renewal terms, and any insurance filings before applying.
Roofing Licenses in Maryland
Residential roofing is covered by the statewide MHIC contractor license (see State-Level Licenses). For commercial roofing or new construction activity, the county where the project is located may require a local construction license from the Clerk of the Circuit Court, along with standard permitting and inspections.
Local Licensing Requirements
Major Cities with Local Requirements:
- Clerks of the Circuit Court (county-level): County construction licenses may be required for commercial roofing or new home projects. Verify whether your roofing company needs a county business/construction license and local insurance filings in addition to your MHIC credential. Registration information: https://labor.maryland.gov/license/oplinks.shtml
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
Specialty Trade Licenses in Maryland
Specialty activities such as well drilling, fire sprinkler contracting, elevator work, asbestos removal, and lead paint abatement are licensed at the state level (see State-Level Specialty Licenses). Depending on project type, location, and occupancy, you may also encounter local registration or county construction license requirements to obtain permits.
Local Licensing Requirements
Major Cities with Local Requirements:
- Clerks of the Circuit Court (county-level): For specialty contractors performing commercial/new home work, confirm whether a county construction license or business registration is required in addition to your state specialty license or accreditation. Registration information: https://labor.maryland.gov/license/oplinks.shtml
Note: Requirements vary by jurisdiction. Always confirm with your local building department before applying.
Application Process
- Determine the trade and license type required (e.g., electrician, plumber, HVACR, home improvement contractor, specialty environmental licenses).
- Verify minimum experience and education requirements on the appropriate board or agency website.
- Register and pass any required licensing examination with PSI for trades using PSI (electricians, plumbers, HVACR contractors, MHIC, stationary engineers, elevator mechanics), or complete accredited training and Board examinations for environmental specialties.
- Assemble required documentation, including applications, experience verification forms, W-2s, training certificates, insurance certificates, and business registration records.
- Submit original license or registration applications through Maryland’s electronic licensing system or the specific agency’s OneStop portal, paying applicable fees.
- Upon approval, receive the license or registration number and, where applicable, register it online with the Maryland Department of Labor.
- Maintain licenses by renewing on the designated biennial or annual cycle, keeping required insurance, surety bonds, and continuing education current.
Timeline: 2–12 weeks from application submission to license issuance for most Department of Labor licenses; environmental and specialty licenses may have longer timelines due to Board review and scheduled examinations.
Reciprocity
Maryland has reciprocity with: Virginia, West Virginia, District of Columbia, Delaware, Baltimore County (local plumbing and gas fitter reciprocity), Washington Suburban Sanitary Commission (WSSC; plumbing and gas fitting), Delaware (plumbing and some gas fitting reciprocity), Delaware and Virginia (HVACR reciprocity).
Requirements: Reciprocity is license-type specific and generally requires holding a current license in good standing obtained by examination in the reciprocal jurisdiction, submission of a Letter of Good Standing, copies of current licenses, and meeting Maryland insurance and experience requirements. For electricians, reciprocal master and journeyperson licenses require proof that the home-state license was earned by exam. For plumbing and gas fitting, reciprocal master or journeyman licenses require holding both plumbing and gas portions of the license and backflow certification where applicable. For HVACR licenses, reciprocal agreements with Delaware and Virginia require comparable licensure and experience. MHIC home improvement contractor licenses do not offer formal reciprocity; out-of-state contractors must meet full Maryland requirements.
Frequently Asked Questions
How long does it take to get a contractor license in Maryland?
Most Maryland Department of Labor licenses are issued within 2–12 weeks after a complete application. Environmental and specialty credentials can take longer due to Board meeting schedules and examination calendars.
Can I transfer my license from another state to Maryland?
Some licenses have reciprocity (e.g., certain electrical, plumbing/gas fitting, and HVACR credentials) with jurisdictions such as Virginia, West Virginia, District of Columbia, and Delaware, and with local entities like WSSC and Baltimore County for specific trades. Reciprocity typically requires proof of having earned your license by examination, a Letter of Good Standing, and meeting Maryland’s insurance and experience standards. MHIC has no formal reciprocity; you must qualify under Maryland’s requirements.
What happens if I fail the exam?
For PSI-administered exams, a waiting period applies before retesting (often 30 days; some boards impose longer intervals for subsequent attempts). You must pay the exam fee for each attempt. Always review your specific board’s retake policy before scheduling.
Do I need insurance?
Yes, many Maryland licenses require insurance. Examples include master electricians (at least $300,000 GL and $100,000 property damage), master plumbers/gas fitters and HVACR contractors (similar minimums), fire sprinkler contractors ($1,000,000 GL), elevator contractors ($1,000,000 GL and $500,000 property damage), and MHIC contractors (general liability, commonly $500,000). Check your board’s exact minimums and certificate holder requirements.
How do I renew my license?
Most licenses renew biennially; some specialties (e.g., asbestos contractor) renew annually. Continuing education may apply to specific credentials (e.g., electricians, elevator mechanics, well drillers). Verify renewal cycles, CE, and fees with your licensing board.
What if my city has different requirements than what’s shown here?
Local requirements can differ. Use the county Clerk of the Circuit Court resources and your local building department to confirm whether a county construction/business license or local registration is needed in addition to your state credential.
Where can I find practice tests for Maryland exams?
We offer comprehensive PDF practice tests for Maryland contractor license exams. Each guide typically includes 1,500–2,500 questions with answer keys and reference locators pointing to exact code sections. Study offline at your own pace; no time or use limits. Browse Maryland contractor practice tests.
Maryland · Practice tests
Maryland contractor license practice tests
The Maryland practice tests we publish today: comprehensive PDF guides, typically 1,500 to 2,500 questions each, with full answer keys and reference locators to the exact code sections. We add new tests regularly, so if your license isn’t listed here, contact us and we’ll build it.
- Business, Law, and Project Management (NASCLA) Reference Practice Test
- Installing Hardwood Flooring NOFMA - Reference Practice Test
- National Electrical Code (NEC) 2017 Practice Test
Related Official Resources
Official Sources for Further Details:
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Maryland State Board of Electricians
https://labor.maryland.gov/license/elec/
Official Board Site | Accessed: 2026-09-13 -
License Requirements – Maryland State Board of Electricians
https://labor.maryland.gov/license/elec/elecreq.shtml
Official Board Site | Accessed: 2026-09-13 -
Taking the Exam – Maryland State Board of Electricians
https://labor.maryland.gov/license/elec/elecexam.shtml
Official Board Site | Accessed: 2026-09-13 -
Fees – Maryland State Board of Electricians
https://labor.maryland.gov/license/elec/elecaff.shtml
Fee Schedule | Accessed: 2026-09-13 -
Maryland Board of Plumbing
https://labor.maryland.gov/license/pl/
Official Board Site | Accessed: 2026-09-13 -
License Requirements – Maryland Board of Plumbing
https://labor.maryland.gov/license/pl/plreq.shtml
Official Board Site | Accessed: 2026-09-13 -
Taking the Exam – Plumbing – Maryland Department of Labor
https://labor.maryland.gov/license/pl/plexam.shtml
Official Board Site | Accessed: 2026-09-13 -
Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration Contractors
https://labor.maryland.gov/license/hvacr/
Official Board Site | Accessed: 2026-09-13 -
License Requirements – HVACR
https://labor.maryland.gov/license/hvacr/hvacrlicreq.shtml
Official Board Site | Accessed: 2026-09-13 -
Taking the Exams – HVACR Board
https://labor.maryland.gov/license/hvacr/hvacrexam.shtml
Official Board Site | Accessed: 2026-09-13 -
Maryland Home Improvement Commission (MHIC)
https://labor.maryland.gov/license/mhic/
Official Board Site | Accessed: 2026-09-13 -
License Categories and Requirements – MHIC
https://www.dllr.state.md.us/license/mhic/mhiclicreq.shtml
Official Board Site | Accessed: 2026-09-13 -
Taking the Exam – MHIC
https://labor.maryland.gov/license/mhic/mhicexam.shtml
Official Board Site | Accessed: 2026-09-13 -
New Home Builder Registration – Office of the Attorney General
https://oag.maryland.gov/i-need-to/new-home-builder
Official Government Site | Accessed: 2026-09-13 -
Board of Well Drillers – Maryland Department of the Environment
https://mde.maryland.gov/programs/Permits/EnvironmentalBoards/Pages/boardofwelldrillers.aspx
Official Board Site | Accessed: 2026-09-13 -
COMAR 26.05.01.04 – Qualification for Examination
https://regs.maryland.gov/us/md/exec/comar/26.05.01.04
State Statute/Regulation | Accessed: 2026-09-13 -
Sprinkler Contractors – Office of the State Fire Marshal
https://mdsp.maryland.gov/firemarshal/Pages/SprinklerContractors.aspx
Official Department Site | Accessed: 2026-09-13 -
Fire Sprinkler Contractor License Application
https://mdsp.maryland.gov/Organization/Documents/DSP-SFMP%20035%20Sprinkler%20Application.pdf
Official Application Form | Accessed: 2026-09-13 -
Maryland Elevator Safety Review Board
https://labor.maryland.gov/license/elev/
Official Board Site | Accessed: 2026-09-13 -
Elevator Contractor License Application
https://labor.maryland.gov/forms/elcontractor.pdf
Official Application Form | Accessed: 2026-09-13 -
Lead Paint Abatement Services – MDE
https://mde.maryland.gov/programs/land/leadpoisoningprevention/pages/inspectors_abatementservices.aspx
Official Department Site | Accessed: 2026-09-13 -
Lead Paint Accreditation – Maryland OneStop
https://onestop.md.gov/licenses/lead-paint-accreditation-5d1540bb54f24d03e9998617
Official Licensing Portal | Accessed: 2026-09-13 -
Asbestos for Contractors – MDE
https://mde.maryland.gov/programs/air/asbestos/pages/contractor.aspx
Official Department Site | Accessed: 2026-09-13 -
Asbestos Contractor License – Maryland OneStop
https://onestop.md.gov/licenses/asbestos-contractor-license-5d1540a354f24d03e9997dcc
Official Licensing Portal | Accessed: 2026-09-13 -
Environmental Boards Overview – MDE
https://mde.maryland.gov/programs/permits/EnvironmentalBoards/Pages/index.aspx
Official Department Site | Accessed: 2026-09-13 -
Links to Business Licenses, Construction Licenses and Other Licenses
https://labor.maryland.gov/license/oplinks.shtml
Official Department Site | Accessed: 2026-09-13 -
PSI Test-Takers Portal – Maryland Electrician
https://test-takers.psiexams.com/mdelec
Exam Provider | Accessed: 2026-09-13 -
PSI Test-Takers Portal – Maryland Master Plumber/Gas Fitter
https://test-takers.psiexams.com/mdplu
Exam Provider | Accessed: 2026-09-13 -
PSI Test-Takers Portal – Maryland HVACR
https://test-takers.psiexams.com/mdhvac
Exam Provider | Accessed: 2026-09-13 -
PSI Test-Takers Portal – Maryland Home Improvement
https://test-takers.psiexams.com/mdhi
Exam Provider | Accessed: 2026-09-13
Important Disclaimer
Information Currency: This guide reflects licensing information as available in 2026. Licensing requirements are subject to change without notice. Always verify current requirements with official sources.
Official Source: For current information, contact Multiple Authorities – See research notes:
- Website: https://labor.maryland.gov/license/
- Phone: 410-230-6231
No Legal Advice: This guide provides general information only. Consult with the licensing board or a qualified professional for guidance specific to your situation.
Local Requirements: Some licensing in Maryland is handled at the city or county level. Always verify requirements with your local building department.