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.

• DOUBLE R AC AND HEATING HVAC/Howard County 6 permits/to Mar 2026
• DSR ELECTRIC Electrical/Howard County 6 permits/to Jul 2026
• Duffy Electric LLC Electrical/Howard County 6 permits/to Aug 2026
• DYNALECTRIC CO Electrical/Howard County 6 permits/to May 2025
• E. C. ERNST INC. Electrical/Anne Arundel County, Howard County, Prince George's County 6 permits/to Sep 2026
• ECONO SIGN INC Sign/Frederick County, Howard County 6 permits/to Jul 2026
• E & G SERVICES Electrical/Howard County 6 permits/to Aug 2025
• ELECTRICAL SERVICES LLC Electrical/Anne Arundel County, Howard County 6 permits/to Aug 2026
• ELECTRICO INC Electrical/Anne Arundel County, Howard County 6 permits/to Jun 2026
• ELITE M&M SERVICES LLC Deck & Patio/Anne Arundel County, Frederick County, Howard County 6 permits/to Aug 2026
• ENERGY HARBOR LLC Solar/Frederick County, Howard County 6 permits/to Feb 2026
• EOS OUTDOOR SERVICES LLC Deck & Patio/Howard County 6 permits/to Jun 2026
• EVERDALE BUILDERS LLC Deck & Patio/Howard County 6 permits/to Aug 2026
• FABER'S PLUMBING AND HEATING Plumbing/Howard County 6 permits/to Sep 2024
• FARNEN AND DERMER, INC HVAC/Howard County 6 permits/to Jul 2025
• FIRST CLASS PLUMBING, LLC Plumbing/Anne Arundel County, Howard County 6 permits/to Sep 2026
• FREDERICK ELECTRIC COMPANY HVAC/Howard County 6 permits/to Jul 2026
• Fresh Air Concepts Electrical/Anne Arundel County, Frederick County, Howard County 6 permits/to Jul 2026
• GAITHERSBURG A/C & HEATING, INC. (DBA GAC SERVICES HVAC/Howard County 6 permits/to Sep 2025
• Genesis Electrical Service LLC Electrical/Frederick County, Howard County, Prince George's County 6 permits/to Sep 2026
• GILBANE BUILDING COMPANY Site/Howard County 6 permits/to Oct 2025
• GMC CONTRACTORS INC Howard County 6 permits/to Feb 2026
• GREEN LIGHT ELECTRICAL CONTRACTORS Deck & Patio/Howard County 6 permits/to Jul 2026
• GREGORINI CONTRACTING LLC Deck & Patio/Anne Arundel County, Howard County 6 permits/to Apr 2026
• HAMEL BUILDERS INC Pool & Spa/Howard County 6 permits/to Jul 2026
• Handyman Jim LLC Deck & Patio/Frederick County, Howard County 6 permits/to Mar 2025
• HBS ENERGY INC/MR. ELECTRIC OF COLUMBIA MD Accessory Structure/Howard County 6 permits/to Aug 2024
• HENSEL PHELPS CONSTRUCTION CO Plumbing/Howard County 6 permits/to Jan 2025
• H&M GENERAL CONSTRUCTION HVAC/Howard County, Prince George's County 6 permits/to Sep 2026
• HTI CONTRACTORS Site/Howard County 6 permits/to Aug 2025
• HURST PLUMBING INC Plumbing/Howard County 6 permits/to Jan 2026
• IMAGE 360 COLUMBIA Sign/Howard County 6 permits/to Jun 2026
• J3 ELECTRICAL SERVICES LLC Electrical/Howard County 6 permits/to Aug 2025
• JAR ELECTRIC LLC Electrical/Anne Arundel County, Frederick County, Howard County 6 permits/to Sep 2026
• J E CONTRACTOR LLC Deck & Patio/Howard County 6 permits/to Aug 2026
• J&J ELECTRIC LLC Electrical/Anne Arundel County, Howard County 6 permits/to Aug 2026
• J&J PRO-BUILD CONSTRUCTION INC Deck & Patio/Howard County 6 permits/to Jul 2026
• J&P MECHANICAL SOLUTIONS LLC HVAC/Anne Arundel County, Howard County 6 permits/to Jul 2026
• JPT ELECTRIC LLC CORPORATION Electrical/Howard County 6 permits/to May 2026
• JR ELECTRICAL CONTRACTORS LLC Electrical/Howard County, Prince George's County 6 permits/to Sep 2026
• LAD'S HVAC LLC HVAC/Howard County 6 permits/to Mar 2026
• LAL SAWMA & BW PLUMBING AND DRAIN Plumbing/Howard County 6 permits/to Oct 2024
• LAWVER PLUMBING COMPANY LLC Plumbing/Anne Arundel County, Howard County 6 permits/to Jul 2026
• LCE ELECTRIC INC Electrical/Howard County 6 permits/to Mar 2026
• LEON ELECTRICAL CONSUTANTS INC. Electrical/Howard County 6 permits/to Aug 2025
• LIFE SAFETY SYSTEMS INC Accessory Structure/Anne Arundel County, Howard County 6 permits/to Aug 2026
• LS SYSTEMS Electrical/Anne Arundel County, Howard County, Prince George's County 6 permits/to Aug 2026
• MADO ELECTRIC LLC Electrical/Anne Arundel County, Howard County 6 permits/to Aug 2026
• MARK H. ANDERSON ELECTRICAL SERVICES Electrical/Howard County 6 permits/to Mar 2026
• MARTY FRANZ ELECTRIC Accessory Structure/Anne Arundel County, Howard County 6 permits/to Mar 2026

Source: county permit records. Updated weekly.