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

SUNRUN INSTALLATION SERVICES INC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 2042 permits/to Sep 2026
FUSION SOLAR SERVICES LLC Solar/Anne Arundel County, Baltimore County, Frederick County, Howard County, Prince George's County 1196 permits/to Sep 2026
TESLA ENERGY OPERATIONS INC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 811 permits/to Sep 2026
JENSON FIRE PROTECTION INC Fire Protection/Anne Arundel County, Frederick County, Prince George's County 739 permits/to Sep 2026
TRINITY WIRING SOLUTIONS Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 605 permits/to Sep 2026
MCCREA EQUIPMENT COMPANY HVAC/Anne Arundel County, Frederick County, Howard County, Prince George's County 522 permits/to Sep 2026
BENFIELD ELECTRIC CO INC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 506 permits/to Sep 2026
CHARLES A KLEIN & SONS, INC. HVAC/Anne Arundel County, Frederick County, Howard County, Prince George's County 224 permits/to Sep 2026
BELAIR ENGINEERING & SERVICE HVAC/Anne Arundel County, Prince George's County 216 permits/to Sep 2026
STANDARD ENERGY SOLUTIONS Solar/Anne Arundel County, Baltimore County, Frederick County, Howard County, Prince George's County 210 permits/to Sep 2026
TRINITY SOLAR LLC Solar/Anne Arundel County, Baltimore County, Frederick County, Howard County, Prince George's County 204 permits/to Sep 2026
HAVEPOWER LLC Accessory Structure/Anne Arundel County, Frederick County, Howard County, Prince George's County 146 permits/to Aug 2026
AMERICAN DESIGN AND BUILD LTD Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 143 permits/to Sep 2026
ADVANCED WIRING SOLUTIONS LLC Electrical/Anne Arundel County, Frederick County, Prince George's County 133 permits/to Sep 2026
UNIFIED ELECTRICAL SOLUTIONS, INC Accessory Structure/Anne Arundel County, Prince George's County 124 permits/to Sep 2026
SUMMIT ELECTRIC COMPANY Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 123 permits/to Sep 2026
EVERON LLC Electrical/Frederick County, Howard County, Prince George's County 111 permits/to Sep 2026
WILLIAM H. METCALFE & SONS, INC HVAC/Anne Arundel County, Howard County, Prince George's County 107 permits/to Sep 2026
METROPOLITAN FIRE PROTECTION Fire Protection/Anne Arundel County, Baltimore County, Frederick County, Prince George's County 105 permits/to Sep 2026
CHRIS WING HVAC/Frederick County, Prince George's County 104 permits/to Sep 2026
THREE BROTHERS SERVICES LLC Electrical/Anne Arundel County, Howard County, Prince George's County 102 permits/to Sep 2026
HAAS & SONS ELECTRIC INC Electrical/Anne Arundel County, Howard County, Prince George's County 99 permits/to Aug 2026
GREENBRILLIANCE LLC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 97 permits/to Aug 2026
Weisman Electric Company Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 84 permits/to Sep 2026
KAYWELL CONSTRUCTION CORPORATION Electrical/Frederick County, Howard County, Prince George's County 74 permits/to Sep 2026
QTEC LLC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 69 permits/to Aug 2026
Venture Home Solar, LLC Solar/Frederick County, Howard County, Prince George's County 50 permits/to Sep 2026
HATZEL & BUEHLER Electrical/Frederick County, Howard County, Prince George's County 49 permits/to Aug 2026
Premium Construction Service Electrical/Frederick County, Howard County, Prince George's County 48 permits/to Sep 2026
FIDELITY ENGINEERING, LLC HVAC/Frederick County, Howard County, Prince George's County 43 permits/to Sep 2026
SYSTCOM INC Electrical/Anne Arundel County, Howard County, Prince George's County 43 permits/to Aug 2026
STILWELL MECHANICAL LLC Electrical/Anne Arundel County, Howard County, Prince George's County 38 permits/to Sep 2026
CAPERS ELECTRICAL SERVICES LLC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 34 permits/to Aug 2026
Shipp Electric Electrical/Anne Arundel County, Howard County, Prince George's County 34 permits/to Sep 2026
GAC SERVICES HVAC/Anne Arundel County, Howard County, Prince George's County 32 permits/to Aug 2026
GEOFF SOLAR ENERGY WORLD Solar/Prince George's County 30 permits/to Sep 2026
ROBERT AMERICAN RESIDENTIAL SERVICES OF LAUREL HVAC/Prince George's County 30 permits/to Sep 2026
SOLAR GAINES LLC Solar/Anne Arundel County, Baltimore County, Howard County, Prince George's County 28 permits/to Aug 2026
BRADLEY ELECTRIC INC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 27 permits/to Sep 2026
R & V ELECTRIC LLC. Electrical/Anne Arundel County, Howard County, Prince George's County 26 permits/to Sep 2026
TRISTAR ELECTRIC INC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 26 permits/to Aug 2026
CORB ELECTRIC LLC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 25 permits/to Sep 2026
EDY NAJERAS Electrical/Anne Arundel County, Prince George's County 24 permits/to Sep 2026
PETER MILLER Fire Protection/Prince George's County 24 permits/to Sep 2026
FALCON HEATING & AIR CONDITIONING INC HVAC/Howard County, Prince George's County 23 permits/to Sep 2026
Brandon Shores Solar/Baltimore County, Prince George's County 22 permits/to Sep 2026
LEO ELECTRIC LLC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 22 permits/to Sep 2026
GUARDIAN PROTECTION Prince George's County 21 permits/to Sep 2026
FH FHURR HVAC/Prince George's County 20 permits/to Sep 2026
HAWKINS ELECTRIC SERVICE INC Electrical/Anne Arundel County, Howard County, Prince George's County 19 permits/to Aug 2026

Source: county permit records. Updated weekly.