HVAC contractors in Frederick County, MD

65 firms whose permit filings in Frederick County we observed, from records beginning August 2021. The 50 most active are listed here, ordered by permits filed in this county, which reflects our coverage as much as their volume.

• ERIC SMOCK HEATING & A/C INC Frederick County 485 permits/to Aug 2026
• LARRY & SONS INC Frederick County 198 permits/to Sep 2026
• MICHAEL AND SON SERVICES, INC. Anne Arundel County, Frederick County, Howard County 175 permits/to Sep 2026
• TRI-STATE HOME SERVICES Frederick County, Howard County 172 permits/to Sep 2026
• F.H. FURR PLUMBING, HEATING, AIR CONDITIONING, & ELECTRICAL Anne Arundel County, Frederick County, Howard County 161 permits/to Sep 2026
• AMERICAN RESIDENTIAL SERVICES Anne Arundel County, Frederick County, Howard County 128 permits/to Sep 2026
• DUKE HEINTZELMAN Frederick County 103 permits/to Apr 2025
• WESLEY BARR Frederick County 102 permits/to Aug 2026
• CONSTELLATION HOME Anne Arundel County, Frederick County, Howard County 89 permits/to Sep 2026
• Tuckers Air Conditioning, Heating and Plumbing Frederick County 72 permits/to Aug 2026
• BRICK STREET CONSTRUCTION, LLC Frederick County, Howard County 61 permits/to Sep 2026
• UNITED AIR TEMP Anne Arundel County, Frederick County, Howard County 56 permits/to Sep 2026
• MCCREA EQUIPMENT COMPANY Anne Arundel County, Frederick County, Howard County, Prince George's County 43 permits/to Sep 2026
• ADAM Q CROUSE Frederick County 41 permits/to Nov 2025
• ANTHONY W PETROLLE Frederick County 34 permits/to Aug 2026
• CHRIS WING Frederick County, Prince George's County 24 permits/to Sep 2026
• BENJAMIN FRANKLIN PLUMBING Frederick County, Howard County 21 permits/to Jul 2026
• CK ELECTRIC LLC Frederick County, Howard County 19 permits/to Aug 2026
• B&B A/C & Heating Service Co Inc Frederick County 18 permits/to Mar 2024
• JAMES J MYERS Frederick County 17 permits/to Jul 2026
• HORIZON SERVICES MD LLC Anne Arundel County, Frederick County, Howard County 14 permits/to Sep 2026
• MONOCACY CHIMNEY CARE Frederick County 14 permits/to Aug 2026
• Parkton Woodland Services Frederick County 13 permits/to Apr 2026
• Zo Plumbing Frederick County 10 permits/to Jun 2026
• Addicks Electric LLC Frederick County, Howard County 9 permits/to May 2026
• PRECISION AUTOMATION, LLC Frederick County 8 permits/to Jul 2026
• WARNER COMMERCIAL Frederick County 8 permits/to Aug 2026
• Douglas and Son Services Frederick County 7 permits/to Jul 2026
• MIHALLAQ DHIMA Frederick County 7 permits/to Jan 2024
• CODY SANCHEZ Frederick County 6 permits/to Mar 2024
• JCM Electrical Inc Anne Arundel County, Frederick County, Howard County 6 permits/to Aug 2026
• LAB Electric & Controls LLC Frederick County 5 permits/to Mar 2026
• MARK W PRESGRAVE Frederick County 5 permits/to Mar 2025
• Christopher M Aquila Frederick County 4 permits/to Feb 2024
• Dustin L Burrill Frederick County 4 permits/to Sep 2025
• EMC POWER SOLUTIONS INC Anne Arundel County, Frederick County, Howard County 4 permits/to Sep 2026
• Michael Bonsby HVAC, Plumbing & Electrical Anne Arundel County, Frederick County 4 permits/to Aug 2026
• Bilder and Sons Plumbing Frederick County 3 permits/to Apr 2024
• DorseykustomcarpentryInc Frederick County 3 permits/to Jun 2026
• FLOW RITE, INC. Frederick County, Howard County 3 permits/to Aug 2025
• GREGORY W NICHOLSON, II Frederick County 3 permits/to Dec 2024
• JAMES A WHEAT Frederick County 3 permits/to Apr 2024
• JR MICHAEL G CAMPBELL Frederick County 3 permits/to Dec 2024
• LLOYD T HAFLE Frederick County 3 permits/to Sep 2025
• PermitFlow Frederick County, Prince George's County 3 permits/to Sep 2026
• TROY BENJAMIN CORBIN Frederick County 3 permits/to Dec 2023
• falcon heating and air condtioning Frederick County 3 permits/to Aug 2026
• BELTWAY AIR CONDITIONING & HEATING Frederick County, Howard County 2 permits/to Aug 2026
• BGIS INTEGRATED TECHNICAL SERVICES US LLC Frederick County, Howard County 2 permits/to May 2026
• CHARLES A KLEIN & SONS, INC. Anne Arundel County, Frederick County, Howard County, Prince George's County 2 permits/to Sep 2026

HVAC contractors in other counties

Other trades in Frederick County

Built from Frederick County permit filings. Not every filing names a contractor, so a firm working here may not appear. See what we cover, or search the full registry.