Contractors active in Maryland county permit records, grouped from public filings. Counts reflect permits attributed to each firm. Not every filing names a contractor, so counts here are a floor. A firm's actual permit activity is usually higher.
| Contractor | Trade | Counties | Permits | Last active |
|---|---|---|---|---|
| ABBOTT BROTHERS PLUMBING | Plumbing | Howard County | 3 | Jul 2026 |
| ABBOTT'S PLUMBING, INC | Plumbing | Howard County | 3 | Jul 2026 |
| ABDULS PLUMBING SERVICE, LLC | Plumbing | Howard County | 3 | May 2026 |
| BRADLEY BUILDING SERVICES LLC | Plumbing | Howard County | 3 | Jun 2026 |
| BW PLUMBING AND DRAIN LLC | Plumbing | Howard County | 3 | Jul 2026 |
| CHUCK SUSSAN PLUMBING AND HVAC | Plumbing | Howard County | 3 | May 2026 |
| COMPLETE COMFORT LLC | Plumbing | Howard County | 3 | Apr 2026 |
| DAY OR NIGHT HOME AND HEARTH | Plumbing | Howard County | 3 | Apr 2026 |
| GABE'S PLUMBING LLC | Plumbing | Howard County | 3 | Jul 2026 |
| GLOBAL HVAC LLC | Plumbing | Howard County | 3 | Jul 2026 |
| JBA'S PLUMBING | Plumbing | Howard County | 3 | May 2026 |
| J.B. HUNT TRANSPORT, INC | Plumbing | Howard County | 3 | Jun 2026 |
| LIBERTY PURE SOLUTIONS, INC. | Plumbing | Howard County | 3 | Apr 2026 |
| MICHAEL RUNK PLUMBING & HEATING | Plumbing | Howard County | 3 | Jun 2026 |
| MOORE'S SYSTEMS MAINTENANCE LLC | Plumbing | Howard County | 3 | Jul 2026 |
| Nisell Plumbing & Heating Inc | Plumbing | Howard County | 3 | May 2026 |
| ON POINT HVAC SERVICES LLC | Plumbing | Howard County | 3 | May 2026 |
| PAVEL ABAEV | Plumbing | Frederick County, Howard County | 3 | Jul 2026 |
| POTTER-TACKETT INC | Plumbing | Howard County | 3 | May 2026 |
| PRO-TECH MECHANICAL CONSTRUCTION LLC | Plumbing | Howard County | 3 | Jul 2026 |
| PULSAR ELECTRIC LLC | Plumbing | Howard County | 3 | Jul 2026 |
| RADKO PLBG | Plumbing | Howard County | 3 | Jun 2026 |
| SB Plumbing, LLC. | Plumbing | Frederick County, Howard County | 3 | Jun 2026 |
| T&D PLUMBING & HEATING CO., INC | Plumbing | Howard County | 3 | Jul 2026 |
| THARCO INCORPORATED | Plumbing | Howard County | 3 | Jun 2026 |
| THE DRAIN GUYS | Plumbing | Howard County | 3 | Jun 2026 |
| TL BROWN CONTRACTOR LLC | Plumbing | Howard County | 3 | Jun 2026 |
| UTILITIES UNLIMITED INC | Plumbing | Howard County | 3 | Apr 2026 |
| WL STATON PLUMBING HEATING AND COOLING, LLC | Plumbing | Howard County | 3 | May 2026 |
| YAQI CONSTRUCTION LLC | Plumbing | Howard County | 3 | Jun 2026 |
Source: county permit records. Updated monthly.