| Business | Phone |
| Gidor Electric Ltd 1127 Mohawk Rd, Ancaster L9G 3K9 | (905) 304-0581 |
| Grohmann Electrical Svc Ltd 124 Mcniven Rd, Ancaster L9G 3S8 | (905) 304-7703 |
| H Alblas Electric 442 Book Rd W, Ancaster L9G 3L1 | (905) 648-5707 |
| J Guite Electric Ltd 335 Wilson St E, Ancaster L9G 2C1 | (905) 304-7665 |
| Prl Maintenance Electric Ltd 335 Wilson St E #B, Ancaster L9G 2C1 | (905) 549-6711 |
| R J Cramm Electric Ltd 1378 Sandhill Dr, Ancaster L9G 4V5 | (905) 648-8005 |
| Cahill Electric 355 Golf Links Rd, Ancaster L9G 4G6 | (905) 648-0515 |
| Fairway Contracting 112 Book Rd W, Ancaster L9G 3L1 | (905) 304-1133 |
| Davidson Electric Inc 527 Calder St, Ancaster L9G 4V1 | (905) 304-4184 |
| Davidson Electric Inc 283 Wilson St E #225, Ancaster L9G 2B8 | (905) 570-0770 |
| Doidge Controls & Automation 166 Orchard Dr, Ancaster L9G 1Z9 | (905) 648-5037 |