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

ASSOCIATES PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 157 permits/to Aug 2026
HARAMIS ELECTRIC HVAC/Anne Arundel County, Howard County 154 permits/to Sep 2026
Grove Heating & Cooling Inc HVAC/Anne Arundel County, Howard County 152 permits/to Sep 2026
S&L SPECIALTY CONTRACTING INC Interior/Anne Arundel County 150 permits/to Apr 2026
BELAIR ENGINEERING & SVC CO. HVAC/Anne Arundel County 149 permits/to Sep 2026
STATON HEATING, COOLING, AND PLUMBING HVAC/Anne Arundel County 148 permits/to Sep 2026
HAVEPOWER LLC Accessory Structure/Anne Arundel County, Frederick County, Howard County, Prince George's County 146 permits/to Aug 2026
LONG ELECTRIC LLC Electrical/Anne Arundel County, Frederick County, Howard County 146 permits/to Sep 2026
PARAMOUNT ELECTRIC CO., INC. Pool & Spa/Anne Arundel County, Frederick County, Howard County 145 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
BROTHERS SERVICES COMPANY Plumbing/Anne Arundel County, Howard County 143 permits/to Aug 2026
POWER FACTOR LLC Solar/Anne Arundel County, Frederick County, Howard County 141 permits/to Aug 2026
C & C ELECTRIC HVAC/Anne Arundel County, Howard County 136 permits/to Sep 2026
ABLE ELECTRICAL SERVICES INC Accessory Structure/Anne Arundel County, Howard County 134 permits/to Sep 2026
ADVANCED WIRING SOLUTIONS LLC Electrical/Anne Arundel County, Frederick County, Prince George's County 133 permits/to Sep 2026
GUARDIAN PROTECTION SERVICES Electrical/Anne Arundel County, Frederick County, Howard County 126 permits/to Aug 2026
TITAN MECHANICAL, INC. HVAC/Anne Arundel County 124 permits/to Feb 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
CORNETT HEATING AND COOLING , LLC HVAC/Anne Arundel County 120 permits/to Sep 2026
THARCO INCORPORATED Plumbing/Anne Arundel County, Howard County 119 permits/to Aug 2026
THOMAS & THOMAS ELECTRIC LLC Accessory Structure/Anne Arundel County, Frederick County, Howard County 119 permits/to Aug 2026
STANLEY MARTIN COMPANIES Anne Arundel County 118 permits/to Feb 2026
BOPAT ELECTRIC CO INC Electrical/Anne Arundel County, Frederick County, Howard County 117 permits/to Aug 2026
THE DECK & FENCE COMPANY LLC Deck & Patio/Anne Arundel County, Baltimore County, Frederick County, Howard County 117 permits/to Aug 2026
ARS DBA BLUE DOT OF MD HVAC/Anne Arundel County 116 permits/to Sep 2026
ANDREWS ARK ELECTRIC LLC Accessory Structure/Anne Arundel County, Howard County 115 permits/to Sep 2026
CLINTON ELECTRIC CO INC Accessory Structure/Anne Arundel County, Frederick County, Howard County 113 permits/to Sep 2026
NVR, INC / RYAN Plumbing/Anne Arundel County 113 permits/to Aug 2026
ROTO ROOTER SERVICES COMPANY Plumbing/Anne Arundel County, Howard County 113 permits/to Sep 2026
PJ Fitzpatrick LLC Plumbing/Anne Arundel County, Frederick County, Howard County 112 permits/to Aug 2026
RENEWABLE ENERGY CORPORATION Solar/Anne Arundel County, Frederick County, Howard County 112 permits/to Sep 2026
CHESAPEAKE ENERGY SOLUTIONS LLC Electrical/Anne Arundel County, Howard County 109 permits/to Aug 2026
WHITE SPARK ELECTRIC Electrical/Anne Arundel County, Frederick County, Howard County 109 permits/to Aug 2026
CLARKSVILLE PLUMBING LLC Plumbing/Anne Arundel County, Howard County 108 permits/to Aug 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
MASTERS MID ATLANTIC LLC DBA AIRTRON LLC HVAC/Anne Arundel County, Howard County 104 permits/to Aug 2026
SUBURBAN PROPANE Plumbing/Anne Arundel County, Baltimore County, Frederick County, Howard County 103 permits/to Sep 2026
THREE BROTHERS SERVICES LLC Electrical/Anne Arundel County, Howard County, Prince George's County 102 permits/to Sep 2026
ARK SYSTEMS INC Electrical/Anne Arundel County, Frederick County, Howard County 99 permits/to Jul 2026
HAAS & SONS ELECTRIC INC Electrical/Anne Arundel County, Howard County, Prince George's County 99 permits/to Aug 2026
PRIME PLUMBING Plumbing/Anne Arundel County, Howard County 99 permits/to Sep 2026
SUNRUN INSTALLATION SVCS Solar/Anne Arundel County 99 permits/to Sep 2026
SUSTAINABLE ENERGY SYSTEMS Solar/Anne Arundel County, Baltimore County, Frederick County, Howard County 98 permits/to Aug 2026
GREENBRILLIANCE LLC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 97 permits/to Aug 2026
WINN ELECTRIC CONTRACTING CO Accessory Structure/Anne Arundel County, Howard County 97 permits/to Sep 2026
C & R ELECTRIC INC Electrical/Anne Arundel County, Frederick County, Howard County 94 permits/to Sep 2026
PULTE HOME COMPANY LLC Accessory Structure/Anne Arundel County, Howard County 94 permits/to Jul 2026
CHASE PLUMBING & WELL SERVICES Plumbing/Anne Arundel County, Frederick County, Howard County 93 permits/to Aug 2026

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Source: county permit records. Updated weekly.