The 25 contractors pulling the most building permits in Cook County, ranked by PermitStack's activity score — built from 717,084 permits on file. Updated from live public records.
| # | Contractor | Permits | Score | Top trades | Last permit |
|---|---|---|---|---|---|
| 1 | Sunrun Installation Services, Inc | 2,539 | 100 | addition, battery, electrical | Aug 2026 |
| 2 | Prime Electric | 1,252 | 100 | addition, battery, demolition | May 2026 |
| 3 | ADT LLC | 1,065 | 100 | addition, battery, demolition | Oct 2025 |
| 4 | PEERLESS ENTERPRISES | 889 | 100 | addition, demolition, fence | Aug 2026 |
| 5 | FELDCO FACTORY DIRECT LLC | 697 | 100 | fence, hvac, interior_remodel | Aug 2026 |
| 6 | ADVENT SYSTEMS LLC DBA | 614 | 76 | addition, demolition, fire_alarm | Dec 2023 |
| 7 | EXTENDED HOME LIVING SVCS,INC. | 572 | 87 | addition, battery, electrical | Jun 2026 |
| 8 | RENEWAL BY ANDERSEN LLC | 564 | 100 | addition, demolition, electrical | Aug 2026 |
| 9 | KING HVAC SYSTEMS | 445 | 95 | hvac, interior_remodel, mechanical | Aug 2026 |
| 10 | POWER HOME REMODELING GROUP LLC | 428 | 100 | addition, electrical, fence | Aug 2026 |
| 11 | CHAVEZ ELECTRIC | 400 | 89 | addition, battery, demolition | Jun 2026 |
| 12 | McDonagh Demolition, Inc | 374 | 100 | addition, demolition, electrical | Jun 2026 |
| 13 | BLUE LINE ELECTRICAL CONTRACTO | 355 | 87 | addition, battery, demolition | Jun 2026 |
| 14 | GARAGE 2017 LLC DBA DA | 323 | 54 | — | Jul 2021 |
| 15 | SIMON PROPERTY GROUP INC | 311 | 89 | addition, demolition, electrical | Aug 2026 |
| 16 | CURRENT COMMUNICATIONS CORP. | 299 | 92 | addition, demolition, electrical | Oct 2025 |
| 17 | REX ELECT. & TECHNOLOGIES LLC | 283 | 86 | addition, battery, demolition | Dec 2023 |
| 18 | PERMIT GROUP | 275 | 88 | electrical, ev_charger, hvac | Aug 2026 |
| 19 | KONE ELEVATOR COMPANY | 274 | 89 | addition, battery, demolition | Nov 2023 |
| 20 | POWER HOME REMODELING | 273 | 100 | addition, electrical, interior_remodel | Jul 2026 |
| 21 | OPR HOME LLC | 262 | 75 | fence, new_construction | Sep 2025 |
| 22 | KAPITAL ELECTRIC COMPANY | 241 | 89 | addition, battery, demolition | Aug 2025 |
| 23 | ACCESS ELEVATOR INC. | 237 | 97 | addition, electrical, interior_remodel | May 2026 |
| 24 | SUPER ELECTRIC CONSTRUCTION CO | 237 | 87 | addition, demolition, electrical | Dec 2023 |
| 25 | CITY SERVICE ELECTRIC INC | 233 | 90 | addition, electrical, ev_charger | 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 Cook County.
Query contractors, scores, and permits programmatically — GET /v1/contractors/search?state=IL&sort=score