HVAC contractors in Howard County, MD

350 firms whose permit filings in Howard 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.

• CONSTELLATION HOME Anne Arundel County, Frederick County, Howard County 3813 permits/to Sep 2026
• ENVIRONMENTAL SYSTEMS ASSOCIATES LLC DBA CROPPMETCALFE Anne Arundel County, Frederick County, Howard County 1586 permits/to Sep 2026
• CONSTELLATION HOME PRODUCTS AND SERVICES LLC Howard County 894 permits/to Oct 2024
• HORIZON SERVICES MD LLC Anne Arundel County, Frederick County, Howard County 848 permits/to Sep 2026
• DAVE'S ELECTRIC Anne Arundel County, Frederick County, Howard County 510 permits/to Sep 2026
• LEN THE PLUMBER Anne Arundel County, Frederick County, Howard County 466 permits/to Sep 2026
• NRG ENERGY/ DBA/ AIRTRON Howard County 436 permits/to Sep 2026
• MASTERS, INC DBA AIRTRON Howard County 374 permits/to Aug 2024
• AMERICAN RESIDENTIAL SERVICES Anne Arundel County, Frederick County, Howard County 347 permits/to Sep 2026
• F.H. FURR PLUMBING, HEATING, AIR CONDITIONING, & ELECTRICAL Anne Arundel County, Frederick County, Howard County 284 permits/to Sep 2026
• MCCREA EQUIPMENT COMPANY Anne Arundel County, Frederick County, Howard County, Prince George's County 278 permits/to Sep 2026
• MICHAEL AND SON SERVICES, INC. Anne Arundel County, Frederick County, Howard County 221 permits/to Sep 2026
• BLUE DOT SERVICES Howard County 218 permits/to Sep 2026
• CHARLES A KLEIN & SONS, INC. Anne Arundel County, Frederick County, Howard County, Prince George's County 215 permits/to Sep 2026
• AMERICAN RESIDENTIAL SERVICE Howard County 213 permits/to Oct 2024
• B & B AIR CONDITIONING & HEATING Howard County 194 permits/to Sep 2026
• MARYLAND ELECTRICAL SOLUTIONS Howard County 152 permits/to Sep 2026
• ANTHONYS ELECTRIC Howard County 144 permits/to Sep 2026
• UNITED AIR TEMP Anne Arundel County, Frederick County, Howard County 143 permits/to Sep 2026
• RON AIR INC Howard County 133 permits/to Aug 2026
• AMERIGAS PROPANE L.P. DBA SERVICEMARK Howard County 110 permits/to Apr 2026
• HUNT PLUMBING HEATING AND AIR CONDITIONING, LLC Howard County 102 permits/to Sep 2026
• Addicks Electric LLC Frederick County, Howard County 80 permits/to May 2026
• ASC HEATING AND AIRCONDITIONING INC Howard County 76 permits/to Aug 2026
• KASTNER PLUMBING & HEATING INC. Howard County 71 permits/to Aug 2026
• WALTS MECHANICAL SERVICES INC Howard County 68 permits/to Aug 2026
• WILLIAM H. METCALFE & SONS, INC Anne Arundel County, Howard County, Prince George's County 65 permits/to Sep 2026
• ECOMIZE USA LLC Anne Arundel County, Frederick County, Howard County 59 permits/to Aug 2026
• Howard County Government Howard County 58 permits/to Sep 2026
• F H FURR PLUMBING, HEATING & AIR CONDITIONING, INC Howard County 56 permits/to Oct 2024
• BURIC'S HEATING & AIR CONDITIONING, INC. Howard County 55 permits/to Sep 2026
• CLARKSVILLE HEATING & AIR, LLC Anne Arundel County, Howard County 49 permits/to Aug 2026
• COMPLETE COMFORT LLC Howard County 49 permits/to Apr 2026
• AVS PLUMBING & HEATING Howard County 47 permits/to Oct 2024
• CK ELECTRIC LLC Frederick County, Howard County 44 permits/to Aug 2026
• THE WHITING TURNER CONTRACTING COMPANY Howard County 43 permits/to Sep 2026
• FIDELITY ENGINEERING, LLC Frederick County, Howard County, Prince George's County 41 permits/to Sep 2026
• HVAC DIRECT LLC Anne Arundel County, Howard County 40 permits/to Aug 2026
• JCM Electrical Inc Anne Arundel County, Frederick County, Howard County 34 permits/to Aug 2026
• EXCEL MECHANICAL CONTRACTORS LLC Howard County 33 permits/to Jul 2026
• ST JOHN PROPERTIES INC Anne Arundel County, Baltimore County, Frederick County, Howard County 33 permits/to Sep 2026
• MARQUIS PROPERTIES GROUP INC Howard County 32 permits/to Aug 2026
• BAY AREA MECHANICAL SERVICES, INC Howard County 31 permits/to Jul 2026
• F.H.FURR PLUMBING, HEATING AND AIR CONDITIONING, I Howard County 31 permits/to Aug 2024
• PLUMBING DESIGNS, INC Howard County 31 permits/to Jul 2025
• REDSTEEL HVAC Howard County 30 permits/to Sep 2026
• ARUNDEL COOLING & HEATING CO INC Anne Arundel County, Howard County 28 permits/to Aug 2026
• JLB MECHANICAL, LLC Howard County 28 permits/to Jun 2026
• WITKOWSKI MECHANICAL Anne Arundel County, Howard County 28 permits/to Sep 2026
• ANCHOR MECHANICAL LLC Anne Arundel County, Frederick County, Howard County 27 permits/to Sep 2026

HVAC contractors in other counties

Other trades in Howard County

Built from Howard 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.