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

CONSTELLATION HOME HVAC/Anne Arundel County, Frederick County, Howard County 5316 permits/to Sep 2026
SUNRUN INSTALLATION SERVICES INC Solar/Anne Arundel County, Frederick County, Howard County, Prince George's County 2042 permits/to Sep 2026
SOLAR ENERGY WORLD Solar/Anne Arundel County, Frederick County, Howard County 1743 permits/to Sep 2026
ENVIRONMENTAL SYSTEMS ASSOCIATES LLC DBA CROPPMETCALFE HVAC/Anne Arundel County, Frederick County, Howard County 1676 permits/to Sep 2026
AT YOUR SERVICE REPAIR, INC. Plumbing/Frederick County, Howard County 1319 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
BRYANT GROUP, INC. Plumbing/Anne Arundel County, Frederick County, Howard County 1087 permits/to Sep 2026
Fence & Deck Connection Deck & Patio/Anne Arundel County, Baltimore County, Frederick County, Howard County 1080 permits/to Sep 2026
HORIZON SERVICES MD LLC HVAC/Anne Arundel County, Frederick County, Howard County 1046 permits/to Sep 2026
CHESAPEAKE PLUMBING & HEATING, INC Plumbing/Anne Arundel County, Frederick County, Howard County 969 permits/to Aug 2026
CONSTELLATION HOME PRODUCTS AND SERVICES LLC HVAC/Howard County 894 permits/to Oct 2024
AMERICAN RESIDENTIAL SERVICES HVAC/Anne Arundel County, Frederick County, Howard County 871 permits/to Sep 2026
CECO, INC Electrical/Anne Arundel County, Frederick County, Howard County 865 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
DAVE'S ELECTRIC HVAC/Anne Arundel County, Frederick County, Howard County 710 permits/to Sep 2026
LEN THE PLUMBER HVAC/Anne Arundel County, Frederick County, Howard County 682 permits/to Sep 2026
F.H. FURR PLUMBING, HEATING, AIR CONDITIONING, & ELECTRICAL HVAC/Anne Arundel County, Frederick County, Howard County 667 permits/to Sep 2026
BEN LEWIS PLUMBING Plumbing/Anne Arundel County, Frederick County, Howard County 655 permits/to Aug 2026
TRINITY WIRING SOLUTIONS Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 605 permits/to Sep 2026
MEGA PLUMBING CORP Plumbing/Anne Arundel County, Frederick County, Howard County 583 permits/to Sep 2026
MCCREA EQUIPMENT COMPANY HVAC/Anne Arundel County, Frederick County, Howard County, Prince George's County 522 permits/to Sep 2026
FREEDOM FOREVER MARYLAND LLC Solar/Anne Arundel County, Frederick County, Howard County 507 permits/to Jun 2026
BENFIELD ELECTRIC CO INC Electrical/Anne Arundel County, Frederick County, Howard County, Prince George's County 506 permits/to Sep 2026
HILLTOP ELECTRIC CO INC Electrical/Anne Arundel County, Howard County 505 permits/to Aug 2026
HEIL PLUMBING Plumbing/Anne Arundel County, Howard County 492 permits/to Sep 2026
NRG ENERGY/ DBA/ AIRTRON HVAC/Howard County 436 permits/to Sep 2026
MICHAEL AND SON SERVICES, INC. HVAC/Anne Arundel County, Frederick County, Howard County 428 permits/to Sep 2026
D & L CLEAN POWER SOLUTIONS LLC Solar/Anne Arundel County, Frederick County, Howard County 395 permits/to Sep 2026
MASTERS, INC DBA AIRTRON HVAC/Howard County 374 permits/to Aug 2024
PROVIDENT ELECTRIC Electrical/Frederick County, Howard County 328 permits/to Sep 2026
JES CONSTRUCTION INC Structural/Anne Arundel County, Baltimore County, Frederick County, Howard County 322 permits/to Sep 2026
EHRHARDT QUALITY PLUMBING Plumbing/Howard County 312 permits/to Sep 2026
ALL AROUND PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 287 permits/to Aug 2026
SILVER DOLLAR ELECTRIC INC. Electrical/Frederick County, Howard County 287 permits/to Sep 2026
ERCOLE ELECTRIC INC Electrical/Frederick County, Howard County 271 permits/to Sep 2026
SPARTAN ELECTRIC Electrical/Anne Arundel County, Frederick County, Howard County 265 permits/to Sep 2026
TRI STAR ELECTRIC INC Accessory Structure/Howard County 246 permits/to Aug 2026
UNITED AIR TEMP HVAC/Anne Arundel County, Frederick County, Howard County 245 permits/to Sep 2026
MAHON PLUMBING INC Plumbing/Anne Arundel County, Frederick County, Howard County 237 permits/to Sep 2026
EDGE ENERGY Solar/Anne Arundel County, Frederick County, Howard County 235 permits/to Sep 2026
CELESTIAL SOLAR INNOVATIONS LLC Solar/Anne Arundel County, Frederick County, Howard County 229 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
T & A Contractors, Inc. Deck & Patio/Anne Arundel County, Baltimore County, Frederick County, Howard County 226 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
BLUE DOT SERVICES HVAC/Howard County 218 permits/to Sep 2026
ROYAL ELECTRIC INC Electrical/Anne Arundel County, Frederick County, Howard County 216 permits/to Sep 2026
AMERICAN RESIDENTIAL SERVICE HVAC/Howard County 213 permits/to Oct 2024
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

Source: county permit records. Updated weekly.