Maryland

Contractor licensing thresholds, regulator routing, requirements, reciprocity, and license types for Maryland’s hybrid local/state construction regulation model.

Maryland uses a hybrid model: home improvement contractors, plumbers, electricians, and HVACR contractors are licensed at the state level, while other construction work is registered by local jurisdictions. There is no general contractor state license. Highway work requires a bid bond on contracts over $100,000 but no formal prequalification.

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 Maryland is to know which trades are licensed at the state level and which are handled locally.

Signal	Value
Home improvement licensing	Required for all home improvement work (no financial limit)
Home improvement liability insurance	$50,000 minimum
Guaranty fund limit	$30,000 per homeowner; $100,000 per contractor
Electrical licensing	State license required statewide (since July 2021)
Plumbing and gas fitting	State license required; separate license needed in Baltimore County and WSSC area
HVACR	State license required; $400,000 combined insurance minimum
Highway bid bond trigger	Contracts over $100,000
Reciprocity model	Board-specific; strongest ties with Delaware and Virginia

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

What type of contractor license does Maryland require for home improvement work?

You need an MHIC (Maryland Home Improvement Commission) license for any residential improvement work, regardless of contract value. The license requires a 70% passing score on an open-book exam, 2 years of building or home improvement experience, $50,000 liability insurance, and a $100 Guaranty Fund contribution. See Home Improvement Contractors.

Does Maryland have a general contractor license?

No. Maryland does not have a statewide general contractor license. Home improvement, plumbing, electrical, and HVACR are licensed at the state level. Other construction work is registered by local jurisdictions (counties and municipalities). See Construction work regulated.

Where do I go to get licensed in Maryland?

Maryland has 6 regulatory bodies. Home improvement goes to the MHIC. Electrical goes to the Board of Master Electricians. Plumbing goes to the Board of Plumbers. HVACR goes to the Board of HVACR Contractors. Highway goes to MDOT SHA. Asbestos and lead go to the Department of the Environment. Most trade boards are at 100 S Charles Street, Baltimore. See Who regulates construction.

How much does it cost to get licensed?

Home improvement contractor: $270 original fee plus $63 exam, biennial renewal $275 plus $125 Guaranty Fund assessment. Master electrician: $20 application, $25 biennial renewal. Master plumber/gas fitter: $70 license plus $65 exam. HVACR master: $75 application and renewal. See Requirements.

What are the insurance requirements?

Home improvement: $50,000 liability. HVACR: $300,000 general liability plus $100,000 property damage ($400,000 combined). Plumbing (insured contractors): $400,000 per occurrence. Highway: $1,000,000/$2,000,000** liability after bid submission. See Requirements.

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

Reciprocity is board-specific. Electrical has reciprocity with Delaware, Virginia, and West Virginia. Plumbing has reciprocity with Delaware only. HVACR has reciprocity with Delaware and Virginia. Delaware is the only state recognized by all three trade boards. See Reciprocal agreements.

Do I need a separate license for electrical work?

Yes. As of July 2021, a state electrical license is required to perform electrical work anywhere in Maryland — counties now issue only registrations. Master electricians need 7 years of experience under a master electrician plus a state trade exam. Journeypersons need 4 years. See Electricians.

What about plumbing in Baltimore County or the WSSC area?

The state plumbing license is statewide with one exception: Baltimore County and the Washington Suburban Sanitary Commission (WSSC) area require a separate local license in addition to the state credential. See Plumbers and Gas Fitters.

Does Maryland require licensing for roofing work?

Roofing on residential properties falls under the home improvement license (MHIC). There is no separate roofing license at the state level. General commercial construction is registered at the local jurisdiction level. See Construction work regulated.

What about highway or public works contracts?

A bid bond is required on highway contracts over $100,000, but there is no formal prequalification process. After bid submission, you need experience certification, liability insurance ($1,000,000/$2,000,000**), and applicable state contractor licenses. See Highway Work.

What is the Guaranty Fund?

The Home Improvement Guaranty Fund reimburses homeowners up to $30,000 per claim (or the amount paid under the contract, whichever is less). Each contractor is covered for up to $100,000 in homeowner claims. Contractors pay a $100 initial contribution and $125 reassessment at each biennial renewal. See Home Improvement Contractors.

Regulators

How does Maryland's hybrid model compare to states with unified licensing?

Maryland’s hybrid approach — state licensing for specific trades, local registration for everything else — is unusual. Most states either have a comprehensive state licensing system or leave everything to local jurisdictions. The absence of a general contractor license means cross-state comparisons must focus on trade-specific credentials. See Construction work regulated.

How does the no-general-contractor-license policy affect regulatory analysis?

Without a general contractor license, Maryland cannot be directly compared to states like Florida, Louisiana, or Alabama that use general contractor boards as primary regulators. Analysis should focus on the four state-level trade credentials (MHIC, plumbing, electrical, HVACR) and note that other construction work defaults to local jurisdiction registration.

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

State level: home improvement (MHIC), plumbing and gas fitting (Board of Plumbers), electrical (Board of Master Electricians since July 2021), HVACR (Board of HVACR Contractors), asbestos and lead (Department of the Environment), and highway bonding (MDOT SHA). Local level: general commercial construction and other non-regulated trades.

How are the regulatory boards organized?

Four of the six regulatory bodies are housed under the Department of Labor at 100 S Charles Street, Baltimore: MHIC, Board of Master Electricians, Board of Plumbers, and Board of HVACR Contractors. MDOT SHA is in Hanover. The Department of the Environment is at 1800 Washington Boulevard, Baltimore.

What are the fees across trades?

MHIC contractor: $270 original, $400 total biennial renewal. Master electrician: $20 application, $25 biennial renewal. Master plumber: $70 license, $65 exam. HVACR master: $75 biennial. The fee structure is notably lower for electrical and plumbing compared to MHIC. See Requirements.

What license classifications does Maryland use?

MHIC: Contractor and Salesperson. Plumbing: Apprentice, Journeyman, Master (with separate natural gas fitter and propane gas fitter tracks). Electrical: Master, Journeyperson, Apprentice, Inspector, Qualified Agent. HVACR: Apprentice, Journeyman, Limited, Master, Master Restricted (with inactive variants). See Types of licenses.

How does reciprocity work in Maryland?

Reciprocity is board-specific and concentrated among mid-Atlantic neighbors. Electrical: Delaware, Virginia, West Virginia. Plumbing: Delaware only. HVACR: Delaware and Virginia. Delaware is the only state recognized by all three trade boards. Home improvement (MHIC) has no reciprocity. See Reciprocal agreements.

What exam requirements exist across boards?

MHIC: open-book exam, 70% passing score. HVACR: exam required, 70% minimum. Electrical: state trade exam required (no published minimum score). Plumbing: exam required for journeyman and master (no published minimum score). See Requirements.

What are the renewal cycles?

MHIC, electrical, and HVACR all renew biennially. Plumbing license duration is not specified as biennial in the source material. Highway bonding is per-contract, not periodic.

How does the plumbing geographic carve-out work?

The state plumbing license covers all of Maryland except Baltimore County and the WSSC area, which require separate local licenses in addition to the state credential. This creates a compliance gap that contractors must address when working in those areas.

How does Maryland compare to neighboring Mid-Atlantic states?

Maryland’s hybrid model (state trade licensing + local general construction registration) differs from Delaware (revenue-based general licensing), Virginia (comprehensive state licensing), and Pennsylvania (limited state licensing). The strongest regulatory ties are with Delaware (reciprocity across all three trade boards). See the South 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 — home improvement, trade work, highway, or environmental — to see which state credential applies.

Find the right regulator

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

Application and renewal details

Exams, fees, bonds, insurance, continuing education, and renewal cycles for each trade.

Reciprocity direction

Find out which boards recognize out-of-state credentials from Delaware, Virginia, or West Virginia.

Special considerations

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

Contractors

Start with the type of work. Maryland licenses home improvement, plumbing, electrical, and HVACR at the state level — but has no general contractor license.

• Home improvement contractors need an MHIC license for any residential improvement work, regardless of contract value.
• Plumbing licenses are statewide, but Baltimore County and the WSSC area require separate local licenses in addition.
• Electrical licensing is statewide as of July 2021 — counties no longer issue electrical licenses, only registrations.
• HVACR contractors must carry $400,000 combined general liability and property damage insurance.
• Highway work requires a bid bond on contracts over $100,000 but no formal prequalification.
• Other construction work is registered at the local jurisdiction level.

Regulators

Maryland is best understood as a hybrid state where trade licensing sits at the state level (under the Department of Labor) while general construction registration is local.

• Six regulatory bodies cover construction: MDOT SHA, MHIC, Board of Master Electricians, Board of Plumbers, Board of HVACR, and the Department of the Environment.
• Four of the six boards are housed under the Department of Labor at 100 S Charles Street, Baltimore.
• Reciprocity is board-specific and strongest with Delaware (3 boards) and Virginia (2 boards).
• The plumbing license has a geographic carve-out for Baltimore County and the WSSC area.

Readiness checklist

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

1. Classify the project lane

   Determine whether the work is home improvement, a regulated trade (plumbing, electrical, HVACR), highway work, or environmental. General construction is handled at the local level.

2. Apply the right credential test

   Home improvement always requires an MHIC license. Trade work requires the relevant board license. Highway work triggers a bid bond on contracts over $100,000.

3. Route to the correct regulator

   Maryland has 6 regulatory bodies. Most trade boards are under the Department of Labor at 100 S Charles Street, Baltimore.

4. Confirm the requirement set

   Confirm exams, experience hours, insurance minimums, fees, and renewal cycles for the specific board before filing.

If you can identify the work lane, confirm the credential requirement, route to the correct board, and verify the requirement set, you have the minimum package needed for a Maryland readiness check.

Navigation

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

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

Construction work regulated

Maryland does not have a single general contractor license. Regulation depends on the type of work and which level of government controls it.

Work lane	What triggers regulation
Home improvement	MHIC license required for all home improvement work (no financial limit on contracts)
Plumbing and gas fitting	State license required for all plumbing and gas services
Electrical	State license required statewide since July 2021
HVACR	State license required; contractors must pass exam and carry insurance
Highway work	Bid bond required on contracts over $100,000; no formal prequalification
Asbestos and lead-based paint	State requirements apply through the Department of the Environment
Other construction	Registered by local jurisdictions (counties and municipalities)

The plumbing license is statewide with one exception: Baltimore County and the Washington Suburban Sanitary Commission (WSSC) area require a separate local license in addition to the state credential.

Common determination scenarios

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

Home improvement on a residential property

Route to the Home Improvement Commission. You need an MHIC license, which requires a 70% passing score on an open-book exam and 2 years of building or home improvement experience. There is no financial limit on contracts, but you must carry $50,000 in liability insurance and contribute to the Guaranty Fund.

Plumbing or gas fitting

Route to the Board of Plumbers. Apprentices need at least 4 years and 7,500 hours to qualify for the journeyman exam. Journeymen must also complete 32 hours of backflow prevention training. Note: Baltimore County and the WSSC area require separate licenses beyond the state credential.

Electrical work

Route to the Board of Master Electricians. As of July 2021, a state license is required to perform electrical work anywhere in Maryland — counties now issue only registrations. Master Electricians need 7 years of experience; Journeypersons need 4 years.

HVAC or refrigeration

Route to the Board of HVACR Contractors. All applicants must pass an exam with a 70% minimum score. Master applicants need at least 3 years as a journeyman with 1,875 hours in the year prior to applying. Contractors must carry $400,000 combined insurance.

Highway or public works

Contact MDOT State Highway Administration. A bid bond is required on contracts over $100,000, but there is no formal prequalification process. Experience certification, liability insurance ($1,000,000/$2,000,000**), and applicable state contractor licenses are required after bid submission.

Who regulates construction

Maryland splits construction regulation across 6 regulatory bodies. Most trade boards are housed under the Department of Labor at 100 S Charles Street in Baltimore. Use this directory to find the board that owns the lane you need.

Highway work — MDOT State Highway Administration

Office of Construction, 7450 Traffic Drive, Hanover, MD 21076

Phone: [phone]

Website: roads.maryland.gov

State procurements are posted on eMaryland Marketplace.

Home improvement contractors and salespersons — Home Improvement Commission

Maryland Department of Labor, 3rd Floor, 100 S Charles Street, Tower 1, Baltimore, MD 21201

Phone: [phone] | Fax: [phone]

Website: labor.maryland.gov/license/MHIC

Master electricians, journeypersons, and apprentices — Board of Master Electricians

100 S Charles Street, Tower 1, Baltimore, MD 21201

Phone: [phone] | Fax: [phone]

Email: [e-mail]

Website: dllr.state.md.us/license/elec

Plumbers and gas fitters — Board of Plumbers

100 S Charles Street, Tower 1, Baltimore, MD 21201

Phone: [phone] | Fax: [phone]

Email: [e-mail]

Website: dllr.state.md.us/license/pl

HVAC and refrigeration contractors — Board of HVACR Contractors

100 S Charles Street, Tower 1, Baltimore, MD 21201

Phone: [phone] | Fax: [phone]

Email: [e-mail]

Website: dllr.state.md.us/license/hvacr

Asbestos and lead-based paint — Department of the Environment

1800 Washington Boulevard, Suite 725, Baltimore, MD 21230

Phone: [phone]

Website: mde.maryland.gov

Requirements

Each Maryland board 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.

Home Improvement Contractors

Requirement	Detail
Exam	Open-book exam on state and federal laws, regulations, and business subjects; passing score of 70%
Experience	Minimum 2 years in building or home improvement and/or related vocational education
Insurance	$50,000 liability insurance required
Financial solvency	Must demonstrate solvency based on scope, total assets, liabilities, credit rating, and net worth
Guaranty Fund	Initial $100 contribution; $125 reassessment at each biennial renewal. Fund reimburses homeowners up to $30,000 per claim (or amount paid under contract, whichever is less). Each contractor is covered for up to $100,000 in homeowner claims.
Contract limits	No financial limits for home improvement contracts
Renewal cycle	Biennial

License type	Original fee	Biennial renewal	Exam fee
Contractor	$270	$275 + $125 fund assessment	$63
Salesperson	$120	$100	$63

A $20 processing fee is included in each original fee. Total contractor renewal every two years is $400 ($275 + $125 fund assessment).

Plumbers and Gas Fitters

All persons who provide or assist in providing plumbing and gas services must be licensed.

Requirement	Detail
Journeyman Plumber/Gas Fitter	Apprentice license for at least 4 years + 7,500 hours under a master plumber + 32 hours backflow prevention training
Master Plumber/Gas Fitter	Journey license for at least 2 years + 3,700 hours under a master plumber
Journeyman Natural Gas Fitter	Current Journey Gas Fitter license from Baltimore County or WSSC, or 3,750 hours as apprentice over 2+ years under a master gas fitter or master plumber
Master Natural Gas Fitter	Current master gas fitter from Baltimore County/WSSC, or 4+ years experience with approved training, or HVACR master with 2+ years gas fitting experience + exam
Propane Gas Fitter (certification)	NPGA training program completion, or pre-1995 county gas fitter license, or equivalent qualifications
Insurance	Insured contractors must maintain $400,000 per occurrence coverage
Geographic note	Statewide except Baltimore County and WSSC area, which require separate local licenses

License type	License fee	Exam fee	Application fee
Apprentice	$15	N/A	N/A
Journeyman Plumber/Gas Fitter	$35	$65	N/A
Journeyman Natural Gas Fitter	$35	$65	$25
Master Plumber/Gas Fitter	$70	$65	N/A
Master Natural Gas Fitter	$70	$65	$50
Propane Gas Fitter Certificate	$35	N/A	$25

Electricians

As of July 2021, state licensing is required everywhere in Maryland. Counties issue registrations only.

Requirement	Detail
Master	7 years under a master electrician or similarly qualified government employee + state trade exam (up to 3 years credit for formal education)
Journeyperson	4 years under a master electrician + state trade exam; or completion of MATC-approved apprenticeship program (license issued within 2 years of completion)
Renewal cycle	Biennial

License type	Application fee	Biennial renewal
Master	$20	$25
Journeyperson	$15	$15
Apprentice	$10	$10

HVACR Contractors

All applicants must pass an examination with a minimum score of 70%. Master, Master Restricted, and Limited contractors who sign or approve contracts must carry general liability and property damage insurance.

Requirement	Detail
Master	3 years as a journeyman providing all HVACR services + 1,875 hours in the year prior to applying + currently hold journeyman or higher license
Master Restricted	3 years as a journeyman; proof of experience required if not currently holding an HVACR license
Limited	2 years as a journeyman under a licensed HVACR master
Journeyman	3 years as an apprentice + 1,875 hours of training under a licensed HVACR contractor + currently hold apprentice license
Insurance	$300,000 general liability + $100,000 property damage ($400,000 combined minimum)

License type	Application and biennial renewal
Apprentice	$10
Journeyman (including Restricted)	$20
Limited	$75
Master Restricted (per category, max 3)	$25 (max $75)
Master	$75
Inactive Master / Restricted / Limited	$25

Master Restricted licenses are issued in up to four combinations of HVACR expertise (heating–forced air, heating–hydronic, ventilation, air conditioning, refrigeration). The per-category fee is capped once a licensee qualifies in three areas.

Highway Work

Requirement	Detail
Prequalification	Not formally required
Bid bond	Required on contracts over $100,000
Liability insurance	$1,000,000 / $2,000,000 required after bid submission
Experience certification	Required after bid submission
State licenses	Applicable state contractor licenses required

Reciprocal agreements

Maryland has board-specific reciprocity arrangements concentrated among mid-Atlantic neighbors. Delaware appears across all three trade boards; Virginia appears in two. Always confirm current status with the specific board.

Reciprocity in Maryland is board-specific. Delaware is the only state recognized by all three trade boards.

Board	Reciprocal states	Coverage
Board of Master Electricians	Delaware, Virginia, West Virginia	3 states
Board of Plumbers	Delaware	1 state
Board of HVACR Contractors	Delaware, Virginia	2 states

Types of licenses

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

Home Improvement

• Contractor
• Salesperson

Plumbing & Gas

• Apprentice Plumber/Gas Fitter
• Apprentice Natural Gas Fitter
• Journeyman Plumber/Gas Fitter
• Journeyman Natural Gas Fitter
• Master Plumber/Gas Fitter
• Master Natural Gas Fitter
• Propane Gas Fitter Certificate

Electrical

• Master Electrician
• Uninsured Master (legacy Inactive Master)
• Inactive Master
• Inspector
• Qualified Agent
• Journeyperson
• Apprentice

HVACR

• Apprentice
• Journeyman
• Journeyman Restricted
• Limited
• Master
• Master Restricted
• Inspector
• Inactive Master License
• Inactive Master Restricted
• Inactive Limited Contractor

See also

South region guide

Browse all South 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:

Delaware

Electrical, plumbing, and HVACR reciprocity with Maryland — the only state recognized by all three trade boards.

Virginia

Electrical and HVACR reciprocity with Maryland.

West Virginia

Electrical reciprocity with Maryland through the Board of Master Electricians.