Universal statewide GC licenses
MARYLAND CONTRACTOR LICENSING · 2026 FIELD GUIDE
Maryland Contractor Licensing & Trade Guide
Maryland does not use one universal statewide general-contractor license. Existing-home improvement routes through MHIC, new-home builders register with the Attorney General, and electrical, plumbing and HVACR work follows separate state boards. Use this guide to match permit scope to the right credential lane.
Research basis: supplied Maryland contractor credential source · Re-check live agency records before relying on a license.
Existing-home improvement
Core state trade boards
MHIC liability minimum
01 · Licensing model
How Maryland Actually Licenses Contractors
Maryland is scope-driven: existing-home improvement, new-home construction and the major skilled trades sit in distinct credential lanes.
No single statewide GC license
Maryland has no one statewide general-contractor classification for every building project. Existing residential home improvement is governed by the Maryland Home Improvement Commission (MHIC); new-home builders register with the Attorney General; electrical, plumbing and HVACR work requires the matching state trade credential.
02 · Core credentials
The Codes That Shape the Market
These are the eight highest-value Maryland credential lanes for permit routing. Acronyms are practical routing labels based on the supplied source; always verify the live state record.
01-
MARYLAND CREDENTIAL
Verify ↗MHIC Home Improvement Contractor
Contracts directly with homeowners for alterations, remodeling, repairs and replacements on existing 1–3 unit residences. The source identifies 01- as the contractor category prefix.
HBR
MARYLAND CREDENTIAL
Verify ↗Home Builder Registration
New-home builders register the legal entity with the Maryland Attorney General Home Builder Registration Unit. This is a registration, not a trade competency license.
ME
MARYLAND CREDENTIAL
Verify ↗Master Electrician
State electrical credential for providing/qualifying electrical services and acting as a business qualified agent. Trade acronyms identify the credential type, not a prefix embedded in the serial license number.
JE
MARYLAND CREDENTIAL
Verify ↗Journeyperson Electrician
Statewide journeyperson electrical credential for work under the direction and control of a master electrician.
MP
MARYLAND CREDENTIAL
Verify ↗Master Plumber
State plumbing credential for providing plumbing services and qualifying a plumbing business.
MGF
MARYLAND CREDENTIAL
Verify ↗Master Natural Gas Fitter
State master natural-gas credential for providing gas-fitting services.
M-HVACR
MARYLAND CREDENTIAL
Verify ↗Master HVACR
Full heating, ventilation, air-conditioning and refrigeration credential used to qualify HVACR work and businesses.
LOCAL
MARYLAND CREDENTIAL
Verify ↗Local Permit Overlay
Commercial general contracting generally runs through local permits/codes, and some jurisdictions add local electrical or plumbing licensing overlays. Always verify the local AHJ.
03 · Trade routing
Maryland Trade Routing Guide
Open each lane to see who to route, what to verify, where the boundary sits and which permit signals matter.
01-MARYLAND ROUTING LANEExisting-Home Improvement
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Existing-Home Improvement
WHO TO ROUTE
Use MHIC for alterations, remodeling, repair and replacement work contracted directly with homeowners on existing 1–3 unit residences.
VERIFY
Verify the MHIC contractor category and active status; the source identifies 01- as the contractor prefix.
BOUNDARY
Do not use MHIC for new-home construction. New homes use the Attorney General registration track.
PERMIT SIGNALS
Strong signals: additions, remodels, kitchens, baths, windows, doors, roofing, siding, decks and repairs.
05-MARYLAND ROUTING LANEHome Improvement Salesperson
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Home Improvement Salesperson
WHO TO ROUTE
Salespersons solicit or sell home improvement for licensed contractors.
VERIFY
The source identifies 05- as the salesperson category prefix.
BOUNDARY
A salesperson is not the contractor business and may not independently contract with the homeowner.
PERMIT SIGNALS
Useful for qualification and compliance, but route the project opportunity to the licensed contractor entity.
HBRMARYLAND ROUTING LANENew-Home Builder
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New-Home Builder
WHO TO ROUTE
Use Home Builder Registration for businesses that build new homes or contract to sell new homes to consumers.
VERIFY
Verify the legal entity in the Attorney General’s Home Builder registry.
BOUNDARY
Registration is distinct from MHIC and is not a trade competency license.
PERMIT SIGNALS
Strong signals: new single-family homes, new townhomes and other consumer new-home construction.
HBR-SRMARYLAND ROUTING LANEHome Builder Sales Representative
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Home Builder Sales Representative
WHO TO ROUTE
Use the sales-representative registration when the individual selling for a registered home builder must be registered.
VERIFY
Verify against the Home Builder Registration Unit.
BOUNDARY
Do not confuse sales registration with builder eligibility or a trade license.
PERMIT SIGNALS
Useful for builder-sales compliance and entity matching.
MEMARYLAND ROUTING LANEElectrical Contracting
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Electrical Contracting
WHO TO ROUTE
Route electrical scopes to the state electrical board and verify the responsible Master Electrician where required.
VERIFY
Also distinguish JE, AE and uninsured-master status from the master credential.
BOUNDARY
Maryland trade acronyms are credential labels; the source says they are not embedded in the license serial.
PERMIT SIGNALS
Strong signals: panels, service upgrades, generators, EV chargers, solar electrical, rewiring and new construction.
JE / AEMARYLAND ROUTING LANEElectrical Workforce
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Electrical Workforce
WHO TO ROUTE
Journeyperson and apprentice credentials support the electrical workforce under the required supervision structure.
VERIFY
JE is statewide; AE is the apprentice credential.
BOUNDARY
Do not route a contractor-level opportunity based only on a worker credential.
PERMIT SIGNALS
Useful for workforce verification on electrical permit scopes.
MPMARYLAND ROUTING LANEPlumbing
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Plumbing
WHO TO ROUTE
Route plumbing contracting to the state plumbing board and verify the Master Plumber or applicable limited-master credential.
VERIFY
Differentiate MP, LMP, JP and AP.
BOUNDARY
Local overlays may also apply in Baltimore County and the WSSC service area according to the supplied source.
PERMIT SIGNALS
Strong signals: repipes, water heaters, fixtures, sewer/water service, kitchens, baths and new construction.
MGFMARYLAND ROUTING LANENatural Gas Fitting
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Natural Gas Fitting
WHO TO ROUTE
Use MGF/JGF/AGF for natural-gas fitting tiers.
VERIFY
Verify the specific gas-fitting credential and supervision level.
BOUNDARY
Do not assume a generic plumbing label is sufficient for every gas-fitting scope.
PERMIT SIGNALS
Strong signals: gas piping, appliance conversion, generators, commercial kitchens and mechanical upgrades.
M-HVACRMARYLAND ROUTING LANEHVACR Contracting
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HVACR Contracting
WHO TO ROUTE
Route full HVACR scopes to a Master HVACR credential.
VERIFY
The source also identifies restricted, limited, journeyman, restricted-journeyman and apprentice variants.
BOUNDARY
Verify the exact license type in the DOPL query; the acronym is not printed as part of the serial number.
PERMIT SIGNALS
Strong signals: replacements, heat pumps, rooftop units, refrigeration, duct systems and new construction.
MR-HVACRMARYLAND ROUTING LANERestricted HVACR
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Restricted HVACR
WHO TO ROUTE
Master restricted credentials cover one or more specialized HVACR categories.
VERIFY
Check whether the specific project scope fits the holder’s restricted category.
BOUNDARY
Do not treat restricted credentials as unrestricted master coverage.
PERMIT SIGNALS
Strong signals: category-specific AC, heating, hydronic, refrigeration and ventilation work.
L-HVACRMARYLAND ROUTING LANELimited HVACR
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Limited HVACR
WHO TO ROUTE
Limited HVACR covers maintenance/repair in limited system scopes described by the board.
VERIFY
Verify the exact limited authority before routing installation or major replacement work.
BOUNDARY
Scope limitations matter more than the acronym alone.
PERMIT SIGNALS
Strong signals: service, maintenance and limited-scope repair.
LOCALMARYLAND ROUTING LANECommercial GC / Local Overlay
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Commercial GC / Local Overlay
WHO TO ROUTE
Maryland’s supplied source states commercial new construction generally has no statewide GC license and runs on local permits and codes.
VERIFY
Check the municipality/county, permit type and any local contractor registration.
BOUNDARY
State trade licenses still apply to electrical, plumbing and HVACR portions of the project.
PERMIT SIGNALS
Strong signals: commercial new buildings, tenant improvements, additions and major alterations.
04 · Searchable directory
Maryland Credential & Routing Directory
Search practical acronyms, credential titles, agencies and routing concepts from the supplied Maryland source.
36 entries
01-
MHIC Home Improvement Contractor
Existing-home improvement contractor category prefix.
MHIC05-
MHIC Salesperson
Home-improvement salesperson category prefix.
MHICMHIC
Maryland Home Improvement Commission
State board regulating home-improvement contractors/salespersons.
LaborHBR
Home Builder Registration
New-home builder business registration.
Attorney GeneralHBR-SR
Home Builder Sales Representative
Individual sales representative for registered home builder.
Attorney GeneralME
Master Electrician
Master state electrical credential.
Electricians BoardJE
Journeyperson Electrician
Journeyperson electrical credential.
Electricians BoardAE
Apprentice Electrician
Apprentice electrical credential.
Electricians BoardUM
Uninsured Master
Master status without the standard insured contracting posture.
Electricians BoardQA
Qualified Agent
Responsible master role for an electrical business.
ElectricalMP
Master Plumber
Master plumbing credential.
Plumbing BoardLMP
Limited Master Plumber
Limited master plumbing credential.
Plumbing BoardJP
Journey Plumber
Journey plumbing credential.
Plumbing BoardAP
Apprentice Plumber
Plumbing apprentice credential.
Plumbing BoardMGF
Master Natural Gas Fitter
Master gas-fitting credential.
Plumbing BoardJGF
Journeyman Natural Gas Fitter
Journeyman gas-fitting credential.
Plumbing BoardAGF
Apprentice Natural Gas Fitter
Apprentice gas-fitting credential.
Plumbing BoardM-HVACR
Master HVACR
Full master HVACR credential.
HVACR BoardMR-HVACR
Master Restricted HVACR
Restricted master HVACR category.
HVACR BoardL-HVACR
Limited HVACR
Limited-scope HVACR credential.
HVACR BoardJ-HVACR
Journeyman HVACR
Journeyman HVACR credential.
HVACR BoardJR-HVACR
Journeyman Restricted HVACR
Restricted journeyman HVACR credential.
HVACR BoardA-HVACR
Apprentice HVACR
HVACR apprentice credential.
HVACR BoardDOPL
Division of Occupational and Professional Licensing
Maryland Labor licensing division and query pathway.
LaborPQ
Public Licensing Query
Lookup for MHIC and trade credentials.
LaborBR 8
Business Regulation Title 8
Home Improvement statutory framework.
Maryland CodeBR 4.5
Business Regulation §4.5
Home Builder Registration framework.
Maryland CodeBOP 6
Business Occupations & Professions Title 6
Electricians statutory framework.
Maryland CodeBOP 12
Business Occupations & Professions Title 12
Plumbing statutory framework.
Maryland CodeBR 9A
Business Regulation Title 9A
HVACR statutory framework.
Maryland CodeLOCAL-E
Local Electrical Overlay
Counties may issue lesser/restricted electrical credentials.
Local AHJWSSC
WSSC Plumbing Overlay
Additional plumbing administration in Montgomery and Prince George’s service area.
Local/RegionalBALT
Baltimore County Plumbing Overlay
Separate local plumbing licensing noted in source.
Local AHJGC
Commercial General Contracting
Generally local permit/code lane rather than one statewide GC license.
Local AHJREMODEL
Existing-Home Remodel
Routes to MHIC plus applicable trade licenses.
RoutingNEW HOME
New-Home Construction
Routes to Home Builder Registration plus trade licenses.
Routing05 · Permit intelligence
Maryland Permit Signals Worth Routing
A permit is a project signal, not proof of an open bid. The strongest value comes from pairing scope, timing and credential fit.
LEAD SIGNAL
Existing-home remodel permit
REQUIRED CHECK
MHIC 01-
ROUTING ACTION
Verify active MHIC contractor business before routing residential improvement work.
WHY IT MATTERS
High-value renovation signal
LEAD SIGNAL
New single-family permit
REQUIRED CHECK
HBR
ROUTING ACTION
Check Home Builder Registration; trade scopes still require their state licenses.
WHY IT MATTERS
Builder + supplier signal
LEAD SIGNAL
Electrical permit
REQUIRED CHECK
ME / JE
ROUTING ACTION
Verify electrical license type and responsible master/qualified-agent relationship as applicable.
WHY IT MATTERS
Electrical contractor signal
LEAD SIGNAL
Plumbing permit
REQUIRED CHECK
MP / JP
ROUTING ACTION
Verify master/worker credentials and any local overlay.
WHY IT MATTERS
Plumbing contractor signal
LEAD SIGNAL
Gas piping permit
REQUIRED CHECK
MGF / JGF
ROUTING ACTION
Apply the natural-gas fitting credential lane.
WHY IT MATTERS
Gas contractor signal
LEAD SIGNAL
HVAC replacement/new install
REQUIRED CHECK
M-HVACR
ROUTING ACTION
Match full/restricted/limited scope to the live credential type.
WHY IT MATTERS
Mechanical contractor signal
LEAD SIGNAL
Commercial new building
REQUIRED CHECK
LOCAL + trades
ROUTING ACTION
GC eligibility is generally local; separately verify electrical, plumbing and HVACR credentials.
WHY IT MATTERS
Multi-trade supplier signal
LEAD SIGNAL
County-specific trade permit
REQUIRED CHECK
LOCAL
ROUTING ACTION
Check local electrical/plumbing overlays in addition to state credentials.
WHY IT MATTERS
Jurisdiction-specific signal
06 · Verification workflow
Verify Maryland in the Right Order
Maryland separates MHIC prefixes, new-home registration, trade credential types and local overlays. Verify the correct layer before treating a permit as a qualified opportunity.
01
Identify project type
Existing-home improvement, new-home construction, commercial work, or a regulated trade.
02
Check MHIC vs HBR
Use MHIC for existing-home improvement and Home Builder Registration for new homes.
03
Apply trade license gate
Electrical, plumbing/gas and HVACR keep their own state credential requirements.
04
Verify the live record
Use Maryland Labor licensing queries or the Attorney General registry as applicable.
05
Check local overlays
Local electrical/plumbing credentials and commercial contractor requirements can add another layer.
06
Match scope, not acronym alone
Restricted/limited credentials must fit the actual work scope before routing.
07 · Authority trail
Official Maryland Sources
Use these state links as the refresh and verification trail. They are the authority path behind the routing model used on this page.
01Maryland Home Improvement CommissionMHIC↗02Maryland Labor Licensing QueriesLOOKUP↗03Attorney General Home Builder Registration UnitHBR↗04State Board of ElectriciansELEC↗05State Board of PlumbingPLUMB↗06Board of HVACR ContractorsHVACR↗07Maryland Business Regulation Title 8 — Home ImprovementBR 8↗08Maryland Home Builder Registration ActBR 4.5↗09Maryland Electricians statuteBOP 6↗10Maryland Plumbing statuteBOP 12↗11Maryland HVACR statuteBR 9A↗12COMAR 09.08 Home Improvement regulationsCOMAR↗
08 · FAQs
Maryland Contractor Licensing Questions
The questions contractors, sales teams and permit-data users are most likely to ask when routing Maryland construction opportunities.
01Does Maryland have a statewide general contractor license?+
No single statewide GC license covers all building work. Existing-home improvement uses MHIC, new-home builders register with the Attorney General, and regulated trades use their own state boards.
02What is MHIC?+
MHIC is the Maryland Home Improvement Commission, which licenses residential home-improvement contractors and salespersons for covered existing-home work.
03What do 01- and 05- mean?+
The supplied source identifies 01- as the MHIC Home Improvement Contractor category prefix and 05- as the Home Improvement Salesperson category prefix.
04Does MHIC cover new-home construction?+
No. The source separates new-home construction into the Attorney General Home Builder Registration track.
05What is HBR?+
HBR is the practical routing label for Home Builder Registration. The source says it is a registration, not a competency license.
06What are ME, JE and AE?+
They are practical credential acronyms for Master Electrician, Journeyperson Electrician and Apprentice Electrician.
07Are those electrical acronyms printed in the license number?+
No. The source says Maryland trade license numbers are plain serials; verify the credential type in the public licensing query.
08What are MP, JP and AP?+
Master Plumber, Journey Plumber and Apprentice Plumber credential labels.
09What are MGF, JGF and AGF?+
Master, Journeyman and Apprentice Natural Gas Fitter credential labels.
10What does M-HVACR mean?+
Master HVACR, the full HVACR contractor credential in the supplied source.
11What are MR-HVACR and L-HVACR?+
Master Restricted HVACR and Limited HVACR. Their scope is narrower than the full master credential.
12Who verifies Maryland trade licenses?+
The Maryland Department of Labor Licensing Queries portal is the source’s verification path for MHIC, electricians, plumbers and HVACR licensees.
13How are new-home builders verified?+
Through the Attorney General’s Home Builder Registration Unit/registry.
14Do local electrical licenses still matter?+
Yes. The source notes some counties issue lesser or restricted electrical credentials below master level.
15Are there local plumbing overlays?+
Yes. The source specifically notes Baltimore County and the WSSC service area as additional local plumbing-licensing overlays.
16How should commercial GC work be routed?+
The supplied source says commercial new construction generally has no statewide GC license and runs on local permits and codes, while state trade licenses still apply.
17Is a permit an open bid?+
No. A permit is a project signal. It does not prove the work is unawarded or available to bid.
18What should TigerLeads verify before routing?+
Project type, municipality, MHIC or Home Builder Registration where applicable, the exact trade credential type, and any local overlay.
Turn Maryland Permits Into Earlier Opportunities.
Use permit timing plus the correct Maryland credential lane to identify relevant contractors, trades and suppliers earlier in the project lifecycle.
