| Business | Phone |
| Brighter Electric Darien 60561 | (630) 325-4915 |
| Cattaneo Electric Co 8170 S Lemont Rd, Darien 60561 | (630) 910-9400 |
| Cattaneo Electric Inc 8171 S Lemont Rd, Darien 60561 | (630) 971-0692 |
| Electric Contractors 7714 Linden Ave, Darien 60561 | (630) 515-1100 |
| Electrical Construction Svc 8404 Wilmette Ave, Darien 60561 | (630) 964-8900 |
| Csj Electric 7202 Walden Ln, Darien 60561 | (630) 202-3348 |