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 |
|---|---|---|---|---|
| John Andrews | Accessory Structure | Frederick County | 7 | Jul 2026 |
| KEYT DAVIS DBA FOCUSED PLUMBING & GAS, LLC | Plumbing | Howard County | 7 | Jun 2026 |
| LRT PLUMBING SERVICES LLC | Plumbing | Howard County | 7 | Jun 2026 |
| MCCREA EQUIPMENT COMPANY | HVAC | Frederick County | 7 | Jul 2026 |
| MICHAEL & SON SERVICE INC | HVAC | Howard County | 7 | Jun 2026 |
| MICKS PLUMBING & HEATING | Plumbing | Frederick County | 7 | Jun 2026 |
| M & N PLUMBING LLC | Plumbing | Howard County | 7 | Jul 2026 |
| N.E. BOB WALTZ PLUMB/HTG-JEFF | HVAC | Frederick County | 7 | Jul 2026 |
| OTARI GEGESHIDZE | Deck & Patio | Baltimore County, Howard County | 7 | Jul 2026 |
| Pole Buildings Plus | Structural | Frederick County | 7 | Jul 2026 |
| ROMAN MECHANICAL INC | Plumbing | Howard County | 7 | Jun 2026 |
| T BRADLEY ROHRER | Plumbing | Frederick County | 7 | Jul 2026 |
| THE DECK & FENCE COMPANY LLC | Deck & Patio | Howard County | 7 | Jun 2026 |
| Top tier solar solutions LLC | Solar | Frederick County | 7 | May 2026 |
| WADI ELECTRIC | Electrical | Howard County | 7 | Jul 2026 |
| WILLIAMS PLUMBING, LLC | Plumbing | Frederick County | 7 | Jul 2026 |
| ABLE ELECTRICAL SERVICES INC | Accessory Structure | Howard County | 6 | Jul 2026 |
| ALLIED REMODELING CORPORATION | Deck & Patio | Howard County | 6 | Jul 2026 |
| AMERICAN RESIDENTIAL SERVICES | HVAC | Frederick County | 6 | Jul 2026 |
| AMERIGAS PROPANE L.P. DBA SERVICEMARK | HVAC | Howard County | 6 | Apr 2026 |
| ARK SYSTEMS INC | Electrical | Howard County | 6 | Jun 2026 |
| BGE EMU | Baltimore County | 6 | Jun 2026 | |
| CHRISTOPHER RICKETTS | Electrical | Frederick County | 6 | Jun 2026 |
| CLASSIC REMODELING CORP INC | Deck & Patio | Frederick County, Howard County | 6 | Jun 2026 |
| Deck And Shed Pros | Deck & Patio | Frederick County, Howard County | 6 | Jun 2026 |
| DIGITAL PROTECTION SERVICES INC | Electrical | Howard County | 6 | Jul 2026 |
| Donald W Guyton Inc | Electrical | Frederick County | 6 | Jun 2026 |
| GAITHERSBURG AIR CONDITIONING& HEATING | HVAC | Howard County | 6 | Jul 2026 |
| GARCIA'S MECHANICAL LLC | Plumbing | Howard County | 6 | Jul 2026 |
| JAOUAD ZOUINE | Plumbing | Howard County | 6 | Jul 2026 |
| JD ELECTRIC LLC | Accessory Structure | Howard County | 6 | Jun 2026 |
| JUDD FIRE PROTECTION, INC. | Fire Protection | Frederick County | 6 | Jun 2026 |
| KASTNER PLUMBING & HEATING INC. | HVAC | Howard County | 6 | Jun 2026 |
| Kline Electrical Services | Electrical | Frederick County | 6 | Jun 2026 |
| KOLB ELECTRIC INC | Electrical | Frederick County, Howard County | 6 | Jul 2026 |
| NEFF ELECTRICAL SERVICES INC | Electrical | Howard County | 6 | Jun 2026 |
| pilgrim decks and fence llc | Deck & Patio | Frederick County, Howard County | 6 | Jul 2026 |
| Randy Horner | Electrical | Frederick County | 6 | Jul 2026 |
| Rick Jones Electric | Electrical | Frederick County | 6 | Jul 2026 |
| SMART ROOF ENERGY DBA 4I ENERGY PARTNERS | Solar | Howard County | 6 | Jun 2026 |
| Stella Electric LLC | Accessory Structure | Frederick County | 6 | Jul 2026 |
| WITKOWSKI MECHANICAL | HVAC | Howard County | 6 | Jun 2026 |
| A&A CONSTRUCTION AND UTILITIES, INC. | Plumbing | Howard County | 5 | Jul 2026 |
| AA ROOTER LLC DBA ROOTERMAN | Plumbing | Frederick County, Howard County | 5 | Jul 2026 |
| Alpha Electric LLC | Electrical | Frederick County | 5 | Jul 2026 |
| AMAZING HEATING & AIR CONDITIONING, INC. | HVAC | Howard County | 5 | Jul 2026 |
| ANTHONY W PETROLLE | HVAC | Frederick County | 5 | Jul 2026 |
| ARCO ELECTRIC INC | Electrical | Frederick County, Howard County | 5 | Jun 2026 |
| BUILD AND DESIGN CONSTRUCTION INC | Structural | Howard County | 5 | Jul 2026 |
| BUILD U HOME LLC | Deck & Patio | Howard County | 5 | Jun 2026 |
Source: county permit records. Updated monthly.