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

SPRINKLERS,LLC FIRE TECH RESID Fire Protection/Frederick County 222 permits/to Aug 2026
ROYAL ELECTRIC INC Electrical/Anne Arundel County, Frederick County, Howard 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
ROBERT A TULL INC Plumbing/Frederick County, Howard County 207 permits/to Aug 2026
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
LARRY & SONS INC HVAC/Frederick County 198 permits/to Sep 2026
DAWN LAWSON Accessory Structure/Frederick County 187 permits/to Sep 2026
SCOTT MERCER LLC Pool & Spa/Frederick County, Howard County 187 permits/to Aug 2026
Top tier solar solutions LLC Solar/Anne Arundel County, Frederick County, Howard County 185 permits/to Aug 2026
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
Rodgers Consulting Inc - Yellow Team Site/Frederick County 173 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
RENOVATION EXPERTS INC Plumbing/Frederick County 161 permits/to Aug 2026
TERRA SOLUTIONS ENGINEERING TERRA SOLUTIONS ENGINEERING Site/Frederick County 161 permits/to Aug 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
BRUCE BOYD Plumbing/Frederick County 156 permits/to Aug 2026
PUTMAN PLUMBING INC Plumbing/Frederick County 151 permits/to Aug 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
AERO ENERGY Site/Baltimore County, Frederick County 142 permits/to Aug 2026
N.E. BOB WALTZ PLUMB/HTG-JEFF Plumbing/Frederick County 142 permits/to Sep 2026
POWER FACTOR LLC Solar/Anne Arundel County, Frederick County, Howard County 141 permits/to Aug 2026
ADVANCED WIRING SOLUTIONS LLC Electrical/Anne Arundel County, Frederick County, Prince George's County 133 permits/to Sep 2026
KIM SIMPSON Electrical/Frederick County 128 permits/to Sep 2026
GOT ELECTRIC LLC Electrical/Frederick County, Howard County 127 permits/to Aug 2026
GUS D BISER Electrical/Frederick County 127 permits/to Aug 2026
GUARDIAN PROTECTION SERVICES Electrical/Anne Arundel County, Frederick County, Howard County 126 permits/to Aug 2026
ALLEN B COBLENTZ Electrical/Frederick County 123 permits/to Aug 2026
DAVID L KLIPP Plumbing/Frederick County 123 permits/to Aug 2026
SUMMIT ELECTRIC COMPANY Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 123 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
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
CLINTON ELECTRIC CO INC Accessory Structure/Anne Arundel County, Frederick County, Howard County 113 permits/to Sep 2026
MICKS PLUMBING & HEATING Plumbing/Frederick 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
THOMAS M GRUENTZEL Electrical/Frederick County 110 permits/to May 2024
WHITE SPARK ELECTRIC Electrical/Anne Arundel County, Frederick County, Howard County 109 permits/to Aug 2026
Barnabas domowski Deck & Patio/Baltimore County, Frederick County 105 permits/to Jul 2026
METROPOLITAN FIRE PROTECTION Fire Protection/Anne Arundel County, Baltimore County, Frederick County, Prince George's County 105 permits/to Sep 2026

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Source: county permit records. Updated weekly.