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 |
|---|---|---|---|---|
| WHITE SPARK ELECTRIC | Electrical | Frederick County, Howard County | 12 | Jul 2026 |
| PARAMOUNT ELECTRIC CO., INC. | Pool & Spa | Frederick County, Howard County | 11 | Jul 2026 |
| PJ Fitzpatrick LLC | Plumbing | Frederick County | 11 | Jul 2026 |
| RENOVATION EXPERTS INC | Plumbing | Frederick County | 11 | Jun 2026 |
| Barrick & Sons Lawn Service LLC | Deck & Patio | Frederick County | 10 | Jun 2026 |
| BOYLAND ELECTRIC INC | Electrical | Frederick County, Howard County | 10 | Jul 2026 |
| BRUCE BOYD | Plumbing | Frederick County | 10 | Jul 2026 |
| MILES ELECTRIC CO INC | Electrical | Frederick County, Howard County | 10 | Jul 2026 |
| Sight & Sound Systems, Inc. | Electrical | Frederick County | 10 | Jun 2026 |
| ALBAUGH & SONS LLC | Electrical | Frederick County | 9 | Jun 2026 |
| ARTISAN INVESTMENTS LLC | Accessory Structure | Frederick County, Howard County | 9 | Jun 2026 |
| CLARKSBURG PLUMBING | Plumbing | Frederick County | 9 | Jul 2026 |
| ELECTRICAL CONNECTIONS LLC | Accessory Structure | Frederick County, Howard County | 9 | Jul 2026 |
| Holtzolpe inc. | Electrical | Frederick County | 9 | Jul 2026 |
| Montgomery Decks | Deck & Patio | Frederick County, Howard County | 9 | Jul 2026 |
| Reed and Son Services, LLC | Plumbing | Frederick County | 9 | Jul 2026 |
| ALLEN B COBLENTZ | Electrical | Frederick County | 8 | Jul 2026 |
| Ash Electric LLC | Electrical | Frederick County, Howard County | 8 | Jul 2026 |
| CASTAWAY PLUMBING | Plumbing | Frederick County, Howard County | 8 | Jun 2026 |
| Cody Wachter | Pool & Spa | Frederick County | 8 | Jun 2026 |
| Eagle Plumbing | Plumbing | Frederick County | 8 | Jul 2026 |
| KIM SIMPSON | Electrical | Frederick County | 8 | Jul 2026 |
| MARK L MCLAUGHLIN | Plumbing | Frederick County | 8 | Jul 2026 |
| Weisman Electric Company | Electrical | Frederick County | 8 | Jun 2026 |
| Wenbrooke Services | Accessory Structure | Frederick County | 8 | Jul 2026 |
| DAN PRI CONSTRUCTION INC | Deck & Patio | Frederick County, Howard County | 7 | Jun 2026 |
| DAVCON ELECTRICAL SERVICES, LLC | Electrical | Frederick County, Howard County | 7 | Jul 2026 |
| ELITE DECKS & PATIOS OF MD LLC | Deck & Patio | Frederick County, Howard County | 7 | Jul 2026 |
| Fireline Powered by Encore-Sprinkler | Fire Protection | Frederick County | 7 | Jun 2026 |
| Fortress Foundation Solutions | Structural | Frederick County, Howard County | 7 | Jul 2026 |
| GOT ELECTRIC LLC GOT ELECTRIC LLC | Electrical | Frederick County | 7 | Jul 2026 |
| GUS D BISER | Electrical | Frederick County | 7 | Jul 2026 |
| John Andrews | Accessory Structure | Frederick County | 7 | Jul 2026 |
| MCCREA EQUIPMENT COMPANY | HVAC | Frederick County | 7 | Jul 2026 |
| MICKS PLUMBING & HEATING | Plumbing | Frederick County | 7 | Jun 2026 |
| N.E. BOB WALTZ PLUMB/HTG-JEFF | HVAC | Frederick County | 7 | Jul 2026 |
| Pole Buildings Plus | Structural | Frederick County | 7 | Jul 2026 |
| T BRADLEY ROHRER | Plumbing | Frederick County | 7 | Jul 2026 |
| Top tier solar solutions LLC | Solar | Frederick County | 7 | May 2026 |
| WILLIAMS PLUMBING, LLC | Plumbing | Frederick County | 7 | Jul 2026 |
| AMERICAN RESIDENTIAL SERVICES | HVAC | Frederick County | 6 | Jul 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 |
| Donald W Guyton Inc | Electrical | Frederick County | 6 | Jun 2026 |
| JUDD FIRE PROTECTION, INC. | Fire Protection | Frederick County | 6 | Jun 2026 |
| Kline Electrical Services | Electrical | Frederick County | 6 | Jun 2026 |
| KOLB ELECTRIC INC | Electrical | Frederick County, Howard County | 6 | Jul 2026 |
| pilgrim decks and fence llc | Deck & Patio | Frederick County, Howard County | 6 | Jul 2026 |
| Randy Horner | Electrical | Frederick County | 6 | Jul 2026 |
Source: county permit records. Updated monthly.