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.

• MY PLUMBER PLUS HVAC/Howard County 9 permits/to Oct 2024
• OAK CONTRACTING LLC HVAC/Howard County 9 permits/to Apr 2026
• PRESS MECHANICAL CONTRACTORS INC HVAC/Anne Arundel County, Frederick County, Howard County 9 permits/to Aug 2026
• SKYLINE HEATING AND AIR HVAC/Howard County 9 permits/to Aug 2026
• SUPREME SERVICE TODAY HVAC/Howard County 9 permits/to May 2024
• THE SEVERN GROUP, INC. HVAC/Anne Arundel County, Howard County 9 permits/to Jul 2026
• ADVANCED GREEN HOME SOLUTIONS HVAC/Anne Arundel County, Howard County 8 permits/to Jul 2026
• B&B A/C & HEAT SVC CO INC HVAC/Anne Arundel County 8 permits/to Aug 2026
• BUILD & DESIGN CONSTRUCT INC HVAC/Anne Arundel County 8 permits/to Aug 2026
• CLIMATE MANAGERS LLC HVAC/Anne Arundel County, Howard County 8 permits/to Aug 2026
• COASTLINE HEATING AND COOLING HVAC/Anne Arundel County, Prince George's County 8 permits/to Sep 2026
• COOL BREEZE HEATING-AIR CONDITIONING-REFRIGERATION HVAC/Howard County 8 permits/to Aug 2026
• CROPP-METCALFE SERVICES HVAC/Anne Arundel County 8 permits/to Aug 2026
• CROUSE PLUMBING/HEATING HVAC/Howard County 8 permits/to Aug 2024
• FALCON HEATING, COOLING & PLUMBING HVAC/Howard County 8 permits/to May 2024
• HIGGINS HEATING AND AIR HVAC/Howard County 8 permits/to Aug 2026
• LISTON ELECTRIC, INC HVAC/Frederick County, Howard County 8 permits/to Jun 2025
• M.P. ENERGY SERVICES, INC HVAC/Howard County 8 permits/to Jul 2026
• NORTHERN BAY ENVIRONMENTAL SYS HVAC/Anne Arundel County, Prince George's County 8 permits/to Aug 2026
• PLANO COUDON LLC HVAC/Howard County 8 permits/to Jun 2026
• PRECISION AUTOMATION, LLC HVAC/Frederick County 8 permits/to Jul 2026
• R SQUARE CONSOLIDATED SERVICES LLC HVAC/Howard County 8 permits/to May 2026
• S.C. CROSTON HEATING AND AIR CONDITIONING HVAC/Howard County 8 permits/to Sep 2026
• SUPER TECH HVAC/Howard County 8 permits/to Aug 2026
• THE MICHAELS COMPANY T/A A.J. MICHAELS COMPANY HVAC/Howard County 8 permits/to Jun 2026
• WARNER COMMERCIAL HVAC/Frederick County 8 permits/to Aug 2026
• W L STATON PLUMBING & HEATING HVAC/Howard County 8 permits/to May 2024
• 24/7 LLC HVAC/Howard County 7 permits/to Apr 2026
• B&B AIR CONDITIONING AND HEATING SERVICE CO INC HVAC/Howard County 7 permits/to Jan 2026
• BOOTHE'S HVAC, PLUMBING AND ELECTRICAL HVAC/Prince George's County 7 permits/to Aug 2026
• CHUCK SUSSAN PLUMBING & HVAC HVAC/Anne Arundel County 7 permits/to Jul 2026
• DJ PLUMBING SERVICE HVAC/Anne Arundel County 7 permits/to Jul 2026
• DONALD L. LOWE & SONS, INC. HVAC/Howard County 7 permits/to Apr 2026
• Douglas and Son Services HVAC/Frederick County 7 permits/to Jul 2026
• EA SERVICES HEATING AND COOLING HVAC/Anne Arundel County, Howard County 7 permits/to Sep 2026
• EDY NAJERAS HVAC SERVICES HVAC/Anne Arundel County 7 permits/to Sep 2026
• ELLINGTON MECHANICAL SERVICES, INC. HVAC/Anne Arundel County, Howard County 7 permits/to Jul 2026
• FIRST CLASS MECHANICAL, LLC HVAC/Anne Arundel County, Howard County 7 permits/to Jul 2026
• FLOW RITE, INC. HVAC/Frederick County, Howard County 7 permits/to Aug 2025
• JKEENEY LLC HVAC/Howard County 7 permits/to Aug 2026
• L.A.W MECHANICAL LLC HVAC/Howard County 7 permits/to Aug 2026
• MARYLAND HEATING & COOLING HVAC/Howard County 7 permits/to Aug 2026
• MIHALLAQ DHIMA HVAC/Frederick County 7 permits/to Jan 2024
• PermitFlow HVAC/Frederick County, Prince George's County 7 permits/to Sep 2026
• PLUMBTASTIC PLUMBING LLC HVAC/Howard County 7 permits/to Sep 2026
• SINES AND SONS HEATING & COOLING- HVAC/Anne Arundel County 7 permits/to Aug 2026
• Southern Maryland Heating & Air, Inc HVAC/Howard County, Prince George's County 7 permits/to Sep 2026
• ADAY BUILD & DESIGN CONSTRUCTION INC HVAC/Prince George's County 6 permits/to Sep 2026
• A.P. MATHEWS HEATING & A/C HVAC/Anne Arundel County, Prince George's County 6 permits/to Sep 2026
• BETHANY AIR CORPORATION HVAC/Anne Arundel County 6 permits/to Aug 2026

Source: county permit records. Updated weekly.