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

TRINITY SOLAR LLC Solar/Anne Arundel County, Baltimore County, Frederick County, Howard County, Prince George's County 204 permits/to Sep 2026
MILES ELECTRIC CO INC Electrical/Anne Arundel County, Frederick County, Howard County 202 permits/to Sep 2026
B & B AIR CONDITIONING & HEATING HVAC/Howard County 194 permits/to Sep 2026
D. W. BAHR PLUMBING & HEATING INC Plumbing/Howard County 191 permits/to Oct 2024
SCOTT MERCER LLC Pool & Spa/Frederick County, Howard County 187 permits/to Aug 2026
O'REILLY ELECTRIC Accessory Structure/Anne Arundel County, Howard County 185 permits/to Aug 2026
Top tier solar solutions LLC Solar/Anne Arundel County, Frederick County, Howard County 185 permits/to Aug 2026
JOSEPH HEIL CO INC. Plumbing/Howard County 184 permits/to Sep 2024
NORTHERN CROSS ELECTRIC INC Electrical/Frederick County, Howard County 184 permits/to Aug 2026
TRI-STATE HOME SERVICES HVAC/Frederick County, Howard County 174 permits/to Sep 2026
TITAN PLUMBING INC Plumbing/Anne Arundel County, Howard County 173 permits/to May 2026
US HOMES LLC Fire Protection/Baltimore County, Howard County 172 permits/to Mar 2024
CLARKSVILLE CONSTRUCTION SERVICES Deck & Patio/Howard County 169 permits/to Sep 2026
Wenbrooke Services Electrical/Frederick County, Howard County 169 permits/to Aug 2026
BUILD AND DESIGN CONSTRUCTION INC Plumbing/Anne Arundel County, Frederick County, Howard County 168 permits/to Aug 2026
David Williams Electric Accessory Structure/Howard County 159 permits/to Sep 2026
ASSOCIATES PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 157 permits/to Aug 2026
ELECTRICAL CONNECTIONS LLC Electrical/Frederick County, Howard County 157 permits/to Sep 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
MARYLAND ELECTRICAL SOLUTIONS HVAC/Howard County 152 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
BEAZER HOMES Deck & Patio/Baltimore County, Howard County 145 permits/to Jun 2026
PARAMOUNT ELECTRIC CO., INC. Pool & Spa/Anne Arundel County, Frederick County, Howard County 145 permits/to Aug 2026
ANTHONYS ELECTRIC HVAC/Howard County 144 permits/to Sep 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
RON AIR INC HVAC/Howard County 133 permits/to Aug 2026
BRYAN MOBERLY PLUMBING SERVICES Plumbing/Howard County 131 permits/to Sep 2026
GOT ELECTRIC LLC Electrical/Frederick County, Howard County 127 permits/to Aug 2026
GUARDIAN PROTECTION SERVICES Electrical/Anne Arundel County, Frederick County, Howard County 126 permits/to Aug 2026
PREMIERE ELECTRICAL SERVICES LLC Electrical/Howard County 126 permits/to Aug 2026
SUMMIT ELECTRIC COMPANY Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 123 permits/to Sep 2026
CORNERSTONE REMODELING LLC Plumbing/Howard County 121 permits/to Sep 2026
KCL ELECTRIC Electrical/Frederick County, Howard County 121 permits/to Aug 2026
TNT PLUMBING & DRAIN SERVICE, LLC Plumbing/Frederick County, Howard County 121 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
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
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
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
EVERON LLC Electrical/Frederick County, Howard County, Prince George's County 111 permits/to Sep 2026

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Source: county permit records. Updated weekly.