Contractor permit directory

Contractors observed in Maryland county permit records, grouped from public filings. Our observation is not complete: not every filing names a contractor, so a firm's real activity is almost always greater than what appears here.

All counties Anne Arundel County Baltimore County Frederick County Howard County Prince George's County

All trades Accessory Structure Deck & Patio Electrical Exterior Fire Protection Gas Interior HVAC Plumbing Pool & Spa Sign Site Solar Structural

BRICK STREET CONSTRUCTION, LLC HVAC/Frederick County, Howard County 62 permits/to Sep 2026
MARYLAND ELECTRIC INC. HVAC/Anne Arundel County 62 permits/to Sep 2026
COASTAL HEAT & AIR CONDT. HVAC/Anne Arundel County 60 permits/to Sep 2026
CLARKSVILLE HEATING & AIR, LLC HVAC/Anne Arundel County, Howard County 58 permits/to Aug 2026
Howard County Government HVAC/Howard County 58 permits/to Sep 2026
F H FURR PLUMBING, HEATING & AIR CONDITIONING, INC HVAC/Howard County 56 permits/to Oct 2024
BURIC'S HEATING & AIR CONDITIONING, INC. HVAC/Howard County 55 permits/to Sep 2026
PLUMBER AND GAS FITTER HVAC/Anne Arundel County 55 permits/to Jul 2026
COMPLETE COMFORT LLC HVAC/Howard County 49 permits/to Apr 2026
HVAC DIRECT LLC HVAC/Anne Arundel County, Howard County 49 permits/to Aug 2026
MICHAEL & SON SERVICES INC HVAC/Anne Arundel County, Howard County 49 permits/to Aug 2026
AVS PLUMBING & HEATING HVAC/Howard County 47 permits/to Oct 2024
JCM Electrical Inc HVAC/Anne Arundel County, Frederick County, Howard County 46 permits/to Aug 2026
MICHAEL AND SON SERVICE HVAC/Anne Arundel County 46 permits/to Sep 2026
ARUNDEL COOLING & HEATING CO INC HVAC/Anne Arundel County, Howard County 45 permits/to Aug 2026
FIDELITY ENGINEERING, LLC HVAC/Frederick County, Howard County, Prince George's County 43 permits/to Sep 2026
THE WHITING TURNER CONTRACTING COMPANY HVAC/Howard County 43 permits/to Sep 2026
ANCHOR MECHANICAL LLC HVAC/Anne Arundel County, Frederick County, Howard County 42 permits/to Sep 2026
ADAM Q CROUSE HVAC/Frederick County 41 permits/to Nov 2025
WITKOWSKI MECHANICAL HVAC/Anne Arundel County, Howard County 39 permits/to Sep 2026
BENJAMIN FRANKLIN PLUMBING HVAC/Frederick County, Howard County 38 permits/to Jul 2026
CONTINENTAL ELECTRIC HVAC/Anne Arundel County, Howard County 36 permits/to Aug 2026
ANTHONY W PETROLLE HVAC/Frederick County 34 permits/to Aug 2026
WALT'S MECHANICAL SERVICES LLC HVAC/Anne Arundel County 34 permits/to Sep 2026
A.J. MICHAELS COMPANY, INC HVAC/Anne Arundel County, Howard County 33 permits/to Aug 2026
EXCEL MECHANICAL CONTRACTORS LLC HVAC/Howard County 33 permits/to Jul 2026
TRI-STATE ELECTRICAL SVCS,INC. HVAC/Anne Arundel County 33 permits/to Sep 2026
GAC SERVICES HVAC/Anne Arundel County, Howard County, Prince George's County 32 permits/to Aug 2026
MARQUIS PROPERTIES GROUP INC HVAC/Howard County 32 permits/to Aug 2026
BAY AREA MECHANICAL SERVICES, INC HVAC/Howard County 31 permits/to Jul 2026
F.H.FURR PLUMBING, HEATING AND AIR CONDITIONING, I HVAC/Howard County 31 permits/to Aug 2024
GROUND LOOP HEATING & AIR CONDITIONING, INC HVAC/Anne Arundel County, Howard County 31 permits/to Aug 2026
PLUMBING DESIGNS, INC HVAC/Howard County 31 permits/to Jul 2025
REDSTEEL HVAC HVAC/Howard County 30 permits/to Sep 2026
ROBERT AMERICAN RESIDENTIAL SERVICES OF LAUREL HVAC/Prince George's County 30 permits/to Sep 2026
OSPREY ELECTRIC LLC HVAC/Anne Arundel County, Howard County 29 permits/to Sep 2026
AIR INNOVATION LLC HVAC/Anne Arundel County, Howard County 28 permits/to Sep 2026
JLB MECHANICAL, LLC HVAC/Howard County 28 permits/to Jun 2026
CLEAN AIR HEATING AND AIR CONDITIONING HVAC/Howard County 27 permits/to Aug 2026
DESIGN FLOW HEATING & COOLING LLC HVAC/Howard County 27 permits/to Aug 2026
D & P ELECTRICAL SERVICE INC HVAC/Anne Arundel County, Howard County 27 permits/to Aug 2026
ON POINT HVAC SERVICES LLC HVAC/Howard County 27 permits/to Aug 2026
REDSTEEL H.V.A.C. INC. HVAC/Howard County 27 permits/to Oct 2024
SINH HA GENERAL CONTRACTOR HVAC/Howard County 27 permits/to Aug 2026
D&I MECHANICAL HVAC/Howard County 26 permits/to Aug 2026
THOMAS D. STERN AIR EXPERTS INC HVAC/Anne Arundel County, Howard County 26 permits/to Aug 2026
CLEAN AIR HEAT. & A/C CO INC HVAC/Anne Arundel County 25 permits/to Aug 2026
MARQUESS HVAC HVAC/Anne Arundel County, Howard County 25 permits/to Aug 2026
SOUTHERN MARYLAND HEATING AND AIR, INC. HVAC/Howard County 25 permits/to Feb 2024
CLIMATECARE HVAC SERVICES LLC HVAC/Anne Arundel County, Howard County 24 permits/to Sep 2026

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Source: county permit records. Updated weekly.