Plumbing contractors in Howard County, MD

497 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.

• AT YOUR SERVICE REPAIR, INC. Frederick County, Howard County 993 permits/to Sep 2026
• CHESAPEAKE PLUMBING & HEATING, INC Anne Arundel County, Frederick County, Howard County 503 permits/to Aug 2026
• HEIL PLUMBING Anne Arundel County, Howard County 464 permits/to Sep 2026
• BRYANT GROUP, INC. Anne Arundel County, Frederick County, Howard County 429 permits/to Sep 2026
• MEGA PLUMBING CORP Anne Arundel County, Frederick County, Howard County 390 permits/to Sep 2026
• EHRHARDT QUALITY PLUMBING Howard County 312 permits/to Sep 2026
• D. W. BAHR PLUMBING Howard County 229 permits/to Sep 2026
• J. A. SMITH & CO. INC. Anne Arundel County, Frederick County, Howard County 217 permits/to Sep 2026
• D. W. BAHR PLUMBING & HEATING INC Howard County 191 permits/to Oct 2024
• JOSEPH HEIL CO INC. Howard County 184 permits/to Sep 2024
• ASSOCIATES PLUMBING INC Anne Arundel County, Frederick County, Howard County 145 permits/to Aug 2026
• BEN LEWIS PLUMBING Anne Arundel County, Frederick County, Howard County 137 permits/to Aug 2026
• BRYAN MOBERLY PLUMBING SERVICES Howard County 131 permits/to Sep 2026
• BUILD AND DESIGN CONSTRUCTION INC Anne Arundel County, Frederick County, Howard County 131 permits/to Aug 2026
• BROTHERS SERVICES COMPANY Anne Arundel County, Howard County 127 permits/to Aug 2026
• CORNERSTONE REMODELING LLC Howard County 121 permits/to Sep 2026
• TNT PLUMBING & DRAIN SERVICE, LLC Frederick County, Howard County 113 permits/to Sep 2026
• HEIL PLUMBING DMV Howard County 103 permits/to Oct 2024
• CLARKSVILLE PLUMBING LLC Anne Arundel County, Howard County 98 permits/to Aug 2026
• Ehrhardt Brothers Quality Plumbing Frederick County, Howard County 98 permits/to Oct 2025
• CHASE PLUMBING & WELL SERVICES Anne Arundel County, Frederick County, Howard County 89 permits/to Aug 2026
• ROTO ROOTER SERVICES COMPANY Anne Arundel County, Howard County 85 permits/to Sep 2026
• PRIME PLUMBING Anne Arundel County, Howard County 81 permits/to Sep 2026
• CAPITAL CITY PLUMBING Anne Arundel County, Howard County 71 permits/to Sep 2026
• THARCO INCORPORATED Anne Arundel County, Howard County 71 permits/to Aug 2026
• JOHN BOUNDS PLUMBING, LLC Howard County 70 permits/to May 2026
• PJ Fitzpatrick LLC Anne Arundel County, Frederick County, Howard County 66 permits/to Aug 2026
• ONEIL PLUMBING Frederick County, Howard County 65 permits/to Aug 2026
• A&A CONSTRUCTION AND UTILITIES, INC. Howard County 64 permits/to Aug 2026
• KEN GRIFFIN PLUMBING Howard County 64 permits/to Oct 2024
• ABBOTT'S PLUMBING, INC Anne Arundel County, Howard County 60 permits/to Aug 2026
• CATONS PLUMBING, DRAINS AND HEATING Howard County 60 permits/to Sep 2026
• MAXIMUM PLUMBING Howard County 59 permits/to Oct 2024
• MARYLAND MECHANICAL SYSTEMS INC. Anne Arundel County, Howard County 58 permits/to Aug 2026
• RAINE & SON, LLC Howard County 58 permits/to Oct 2025
• ROMAN MECHANICAL INC Frederick County, Howard County 58 permits/to Aug 2026
• AA ROOTER LLC DBA ROOTERMAN Frederick County, Howard County 56 permits/to Sep 2026
• M & N PLUMBING LLC Anne Arundel County, Howard County 54 permits/to Sep 2026
• PLUMBING MASTERED, LLC Howard County 54 permits/to Sep 2026
• MCALLISTER PLUMBING INC Anne Arundel County, Howard County 52 permits/to Sep 2026
• PICTURE PERFECT HOME REPAIR AND REMODELING LLC Howard County 51 permits/to Jun 2024
• DESIGN KITCHEN AND BATH LLC Baltimore County, Howard County 50 permits/to Feb 2026
• ABDULS PLUMBING SERVICE, LLC Anne Arundel County, Howard County 46 permits/to Jul 2026
• ZEPP PLUMBING & HEATING, INC. Frederick County, Howard County 45 permits/to Sep 2026
• MCGUIRE PLUMBING & HEATING, INC. Anne Arundel County, Howard County 44 permits/to Sep 2026
• T&D PLUMBING & HEATING CO., INC Howard County 44 permits/to Aug 2026
• TEVIS OIL, INC. Frederick County, Howard County 42 permits/to Aug 2026
• JB HUNT TRANSPORT INC. Howard County 40 permits/to Oct 2024
• SUBURBAN PROPANE Anne Arundel County, Baltimore County, Frederick County, Howard County 40 permits/to Sep 2026
• UTILITIES UNLIMITED INC Anne Arundel County, Howard County 39 permits/to Jul 2026

Plumbing 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.