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

BOB PORTER CO INC HVAC/Howard County 4 permits/to Apr 2026
BOGDAN COMPUTER SERVICES INC Electrical/Howard County 4 permits/to Apr 2026
BOOTHE'S HVAC, PLUMBING & ELECTRICAL Plumbing/Howard County 4 permits/to Jan 2026
BOZ ENGINEERING GROUP Howard County 4 permits/to Feb 2026
BROADNECK PROPERTIES LLC Structural/Anne Arundel County, Howard County 4 permits/to Jun 2026
BROWNING CONSTRUCTION COMPANY INC Pool & Spa/Frederick County, Howard County 4 permits/to Jul 2025
BUDGET WATERPROOFING INC Interior/Anne Arundel County, Frederick County, Howard County 4 permits/to Feb 2026
BUILDING INFRASTRUCTURE GROUP INC Electrical/Howard County 4 permits/to Jul 2026
BURCO PLUMBING Plumbing/Anne Arundel County, Howard County 4 permits/to Jun 2026
CAPITAL SITE LIGHTING LLC Sign/Howard County 4 permits/to May 2026
CAPITAL SOLAR GROUP LLC Solar/Frederick County, Howard County 4 permits/to Feb 2026
CAPITOL ALARM SERVICES LLC Electrical/Howard County 4 permits/to May 2025
CAPSTONE MECHANICAL LLC HVAC/Howard County 4 permits/to Aug 2026
CAPTAIN FIRE PROTECTION CORP HVAC/Frederick County, Howard County 4 permits/to Mar 2026
CBIZ INSURANCE SERVICES Plumbing/Howard County 4 permits/to Aug 2025
CENTRICITY GROUP LLC Deck & Patio/Howard County 4 permits/to Apr 2026
CES SALES LLC Interior/Frederick County, Howard County 4 permits/to Mar 2026
CHARLES H. MULLENBERG CO., INC. Plumbing/Howard County 4 permits/to Mar 2026
CHAW SING RENOVATION INC Deck & Patio/Howard County 4 permits/to Jan 2026
CHESAPEAKE COMFORT SYSTEMS HVAC/Anne Arundel County, Howard County 4 permits/to Jun 2026
C H I CONTRACTORS 01 71948 Deck & Patio/Howard County 4 permits/to Jun 2026
Childress Electric LLC Electrical/Frederick County, Howard County 4 permits/to Mar 2025
Cima Network Inc Sign/Frederick County, Howard County 4 permits/to Apr 2024
CMB CONSTRUCTION GROUP LLC Deck & Patio/Howard County 4 permits/to Jul 2026
CN PLUMBING LLC Plumbing/Howard County 4 permits/to Sep 2025
COMFORT SYSTEMS INC HVAC/Howard County 4 permits/to Jan 2026
COMMERCIAL CONTRACTORS, INC Site/Howard County 4 permits/to Dec 2025
Conewago Enterprises Structural/Frederick County, Howard County 4 permits/to Jun 2026
COOLLAND TECH INC. HVAC/Howard County 4 permits/to Aug 2026
CORE ELECTRIC LLC Pool & Spa/Howard County 4 permits/to Mar 2025
COSTELLO CONSTRUCTION OF MD INC Pool & Spa/Howard County 4 permits/to Apr 2026
CROSEN HOMES LLC Deck & Patio/Howard County 4 permits/to Jun 2026
CURRENT ALTERNATIVES LLC Electrical/Anne Arundel County, Howard County 4 permits/to Jun 2026
CUSTOM QUALITY PLUMBING & HEAT Plumbing/Howard County 4 permits/to May 2026
DECKMASTER INC Deck & Patio/Howard County 4 permits/to Oct 2024
DECKS UNLIMITED LLC Deck & Patio/Howard County 4 permits/to Jul 2026
DEFINE CONSTRUCTION & DESIGN Plumbing/Howard County 4 permits/to Apr 2026
DELANEY CONSTRUCTION LLC Deck & Patio/Howard County 4 permits/to Apr 2026
DKW Electrical Company LLC Plumbing/Frederick County, Howard County 4 permits/to Jul 2024
DOHERTY PLUMBING CO., INC. HVAC/Howard County 4 permits/to Mar 2026
DREAM DESIGN BUILD AND REMODELING Deck & Patio/Howard County 4 permits/to Apr 2024
DSV CONTRACTING LLC Deck & Patio/Anne Arundel County, Howard County 4 permits/to Jun 2026
DULLES PLUMBING GROUP, INC. Plumbing/Anne Arundel County, Howard County 4 permits/to Apr 2026
DUNRITE MECHANICAL,LLC HVAC/Howard County 4 permits/to Apr 2024
EAST COAST LOW VOLTAGE Electrical/Howard County 4 permits/to Feb 2025
EASTERN ELECTRIC & CONTROLS Accessory Structure/Howard County 4 permits/to Jun 2026
ELCHEMIST INC Fire Protection/Anne Arundel County, Howard County 4 permits/to Feb 2026
ELECTRICAL AUTOMATION SERVICES HVAC/Howard County 4 permits/to Apr 2025
Elite Custom Home Builders, LLC Plumbing/Frederick County, Howard County 4 permits/to Mar 2026
E LONG DISTINCTIVE DESIGNS INC Deck & Patio/Howard County 4 permits/to Nov 2025

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Source: county permit records. Updated weekly.