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

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AT YOUR SERVICE REPAIR, INC. Plumbing/Frederick County, Howard County 1319 permits/to Sep 2026
BRYANT GROUP, INC. Plumbing/Anne Arundel County, Frederick County, Howard County 1087 permits/to Sep 2026
CHESAPEAKE PLUMBING & HEATING, INC Plumbing/Anne Arundel County, Frederick County, Howard County 969 permits/to Aug 2026
BEN LEWIS PLUMBING Plumbing/Anne Arundel County, Frederick County, Howard County 655 permits/to Aug 2026
MEGA PLUMBING CORP Plumbing/Anne Arundel County, Frederick County, Howard County 583 permits/to Sep 2026
CULLIGAN WATER TREATMENT Plumbing/Frederick County 502 permits/to Sep 2026
HEIL PLUMBING Plumbing/Anne Arundel County, Howard County 492 permits/to Sep 2026
EHRHARDT QUALITY PLUMBING Plumbing/Howard County 312 permits/to Sep 2026
BEN LEWIS INC Plumbing/Frederick County 298 permits/to Sep 2026
ALL AROUND PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 287 permits/to Aug 2026
7820-A AIRPARK ROAD Plumbing/Anne Arundel County 238 permits/to Sep 2026
MAHON PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 237 permits/to Sep 2026
D. W. BAHR PLUMBING Plumbing/Howard County 229 permits/to Sep 2026
J. A. SMITH & CO. INC. Plumbing/Anne Arundel County, Frederick County, Howard County 227 permits/to Sep 2026
ROBERT A TULL INC Plumbing/Frederick County, Howard County 207 permits/to Aug 2026
D. W. BAHR PLUMBING & HEATING INC Plumbing/Howard County 191 permits/to Oct 2024
JOSEPH HEIL CO INC. Plumbing/Howard County 184 permits/to Sep 2024
TITAN PLUMBING INC Plumbing/Anne Arundel County, Howard County 173 permits/to May 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
ASSOCIATES PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 157 permits/to Aug 2026
BRUCE BOYD Plumbing/Frederick County 156 permits/to Aug 2026
PUTMAN PLUMBING INC Plumbing/Frederick County 151 permits/to Aug 2026
BROTHERS SERVICES COMPANY Plumbing/Anne Arundel County, Howard County 143 permits/to Aug 2026
N.E. BOB WALTZ PLUMB/HTG-JEFF Plumbing/Frederick County 142 permits/to Sep 2026
BRYAN MOBERLY PLUMBING SERVICES Plumbing/Howard County 131 permits/to Sep 2026
DAVID L KLIPP Plumbing/Frederick County 123 permits/to Aug 2026
CORNERSTONE REMODELING LLC Plumbing/Howard County 121 permits/to Sep 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
MICKS PLUMBING & HEATING Plumbing/Frederick 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
CLARKSVILLE PLUMBING LLC Plumbing/Anne Arundel County, Howard County 108 permits/to Aug 2026
AA ROOTER LLC DBA ROOTERMAN Plumbing/Frederick County, Howard County 104 permits/to Sep 2026
HEIL PLUMBING DMV Plumbing/Howard County 103 permits/to Oct 2024
SUBURBAN PROPANE Plumbing/Anne Arundel County, Baltimore County, Frederick County, Howard County 103 permits/to Sep 2026
Ehrhardt Brothers Quality Plumbing Plumbing/Frederick County, Howard County 99 permits/to Oct 2025
PRIME PLUMBING Plumbing/Anne Arundel County, Howard County 99 permits/to Sep 2026
CHASE PLUMBING & WELL SERVICES Plumbing/Anne Arundel County, Frederick County, Howard County 93 permits/to Aug 2026
Reed and Son Services, LLC Plumbing/Frederick County 89 permits/to Sep 2026
CLARKSBURG PLUMBING Plumbing/Frederick County, Howard County 86 permits/to Sep 2026
MARK L MCLAUGHLIN Plumbing/Frederick County 86 permits/to Aug 2026
ROMAN MECHANICAL INC Plumbing/Frederick County, Howard County 84 permits/to Aug 2026
T BRADLEY ROHRER Plumbing/Frederick County 84 permits/to Aug 2026
Home Express Delivery Service LLC Plumbing/Frederick County 82 permits/to Jan 2026
GLADHILL PLUMBING & HTG Plumbing/Frederick County 79 permits/to Sep 2026
AC&T Plumbing/Frederick County 78 permits/to Sep 2026
FREDERICK PLUMBING & HEATING Plumbing/Frederick County, Howard County 78 permits/to May 2026

Source: county permit records. Updated weekly.