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 |
|---|---|---|---|---|
| CECO, INC | Electrical | Frederick County, Howard County | 84 | Jul 2026 |
| KENNETH J LEMERE/SPARTAN ELEC | Electrical | Frederick County | 50 | Jul 2026 |
| ADT Security LLC | Electrical | Frederick County | 38 | Jul 2026 |
| Ramiro A Fernandez | Electrical | Frederick County | 28 | Jul 2026 |
| PROVIDENT ELECTRIC | Electrical | Frederick County, Howard County | 26 | Jul 2026 |
| NORTHERN CROSS ELECTRIC INC | Electrical | Howard County | 19 | Jul 2026 |
| ERCOLE ELECTRIC INC | Electrical | Frederick County | 18 | Jul 2026 |
| ROYAL ELECTRIC INC | Electrical | Frederick County, Howard County | 17 | Jul 2026 |
| EDGE ENERGY DBA EQUITY DEVELOPMENT | Electrical | Howard County | 16 | Jul 2026 |
| KCL ELECTRIC | Electrical | Frederick County, Howard County | 16 | Jul 2026 |
| CLARKSVILLE ELECTRIC LLC | Electrical | Howard County | 15 | Jul 2026 |
| TIM KYLE CO ELECTRICAL SERVICE INC | Electrical | Howard County | 14 | Jul 2026 |
| LONG ELECTRIC LLC | Electrical | Frederick County, Howard County | 12 | Jun 2026 |
| PRECISION ELECTRICAL SOLUTIONS | Electrical | Frederick County | 12 | Jul 2026 |
| WHITE SPARK ELECTRIC | Electrical | Frederick County, Howard County | 12 | Jul 2026 |
| BOYLAND ELECTRIC INC | Electrical | Frederick County, Howard County | 10 | Jul 2026 |
| MILES ELECTRIC CO INC | Electrical | Frederick County, Howard County | 10 | Jul 2026 |
| REEDY ELECTRICAL SERVICES INC | Electrical | Howard County | 10 | Jul 2026 |
| Sight & Sound Systems, Inc. | Electrical | Frederick County | 10 | Jun 2026 |
| ALBAUGH & SONS LLC | Electrical | Frederick County | 9 | Jun 2026 |
| Holtzolpe inc. | Electrical | Frederick County | 9 | Jul 2026 |
| RENOVATIONS EXPERT INC | Electrical | Howard County | 9 | Jul 2026 |
| ALLEN B COBLENTZ | Electrical | Frederick County | 8 | Jul 2026 |
| Ash Electric LLC | Electrical | Frederick County, Howard County | 8 | Jul 2026 |
| BLUE JAY ELECTRIC CO | Electrical | Howard County | 8 | Jul 2026 |
| CHESAPEAKE ENERGY SOLUTIONS LLC | Electrical | Howard County | 8 | Jul 2026 |
| KIM SIMPSON | Electrical | Frederick County | 8 | Jul 2026 |
| Shipp Electric | Electrical | Howard County | 8 | Jun 2026 |
| VIBRANIUM ELECTRICAL SERVICES LLC | Electrical | Howard County | 8 | Jul 2026 |
| Weisman Electric Company | Electrical | Frederick County | 8 | Jun 2026 |
| CECCIO ELECTRIC LLC | Electrical | Howard County | 7 | Jul 2026 |
| CLINTON ELECTRIC CO INC | Electrical | Howard County | 7 | Jul 2026 |
| DAVCON ELECTRICAL SERVICES, LLC | Electrical | 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 |
| HATZEL & BUEHLER | Electrical | Howard County | 7 | Jul 2026 |
| WADI ELECTRIC | Electrical | Howard County | 7 | Jul 2026 |
| ARK SYSTEMS INC | Electrical | Howard County | 6 | Jun 2026 |
| CHRISTOPHER RICKETTS | Electrical | Frederick County | 6 | Jun 2026 |
| DIGITAL PROTECTION SERVICES INC | Electrical | Howard County | 6 | Jul 2026 |
| Donald W Guyton Inc | Electrical | 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 |
| NEFF ELECTRICAL SERVICES INC | Electrical | Howard County | 6 | Jun 2026 |
| Randy Horner | Electrical | Frederick County | 6 | Jul 2026 |
| Rick Jones Electric | Electrical | Frederick County | 6 | Jul 2026 |
| Alpha Electric LLC | Electrical | Frederick County | 5 | Jul 2026 |
| ARCO ELECTRIC INC | Electrical | Frederick County, Howard County | 5 | Jun 2026 |
| DIXIE ELECTRIC,INC | Electrical | Frederick County, Howard County | 5 | Jul 2026 |
| FRED ORAL ROBERTS THOMPSON | Electrical | Howard County | 5 | Jun 2026 |
Source: county permit records. Updated monthly.