The 11 contractors pulling the most building permits in Baltimore County, ranked by PermitStack's activity score — built from 165,409 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | US HOMES | 76 | 72 | addition, electrical, foundation | Nov 2023 |
| 2 | T & A Contractors, Inc. | 58 | 82 | addition, electrical, hvac | May 2025 |
| 3 | R & F METALS INC | 54 | 65 | addition, fence | Nov 2025 |
| 4 | KM Printing LLC | 43 | 45 | pool, sign | Apr 2023 |
| 5 | U.S. HOME | 42 | 59 | new_construction, renovation, roofing | Aug 2023 |
| 6 | NVR INC | 37 | 97 | addition, electrical, foundation | Sep 2023 |
| 7 | MERRITT CONSTRUCTION SERVICES | 29 | 73 | demolition, electrical, grading | Jan 2025 |
| 8 | NV Homes | 25 | 44 | new_construction, renovation | Jun 2022 |
| 9 | GreenTrax Inc | 18 | 37 | — | Mar 2023 |
| 10 | ADVANCED FIRE PROTECTION SYSTEMS LLC | 17 | 51 | addition, fire_alarm, renovation | Mar 2023 |
| 11 | AJ TECH LLC | 14 | 56 | fence | Jun 2026 |
"Score" is a 0–100 activity index from permit volume, recency, project value, and geographic reach. "Permits" counts building permits this contractor pulled in Baltimore County.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=MD&sort=score