| Business | Phone |
| Accel Electrical 12 Bradwick Dr #1, Concord L4K 3P6 | (905) 738-6970 |
| Aetna Electric Co 750 Millway Ave, Concord L4K 3T7 | (905) 669-8454 |
| Antech Electrical Svc Ltd 160 Applewood Cres #28, Concord L4K 4H2 | (905) 660-3922 |
| Antra Electric Ltd 8540 Keele St, Concord L4K 2N2 | (905) 660-3770 |
| Automatic Switching Inc 391 Edgeley Blvd, Concord L4K 4A7 | (905) 669-6310 |
| Gridd Electrical Svc 30 Pennsylvania Ave, Concord L4K 4A5 | (905) 761-5413 |
| J D Electric 133 Applewood Cres, Concord L4K 4E4 | (905) 660-0016 |
| J Watts Electrical Inc 665 Millway Ave, Concord L4K 3T8 | (905) 669-4772 |
| Lima Electric Inc 70 Pippin Rd #55, Concord L4K 4M9 | (905) 760-1115 |
| Jml Electric 25 Edilcan Dr #10, Concord L4K 3S4 | (905) 761-9680 |
| Jo-Tech Electrical Contractor 2900 Langstaff Rd, Concord L4K 4R9 | (905) 660-3406 |
| Mayfair Electric Ltd 601 Edgeley Blvd #10, Concord L4K 4G2 | (905) 738-2244 |
| Midtown Enterprises Ltd 470 N Rivermede Rd #11, Concord L4K 3R8 | (905) 738-4292 |
| Monopoli Electric Ltd 133 Applewood Cres, Concord L4K 4E4 | (905) 738-5729 |
| Night Light Inc 23 Mccleary Crt, Concord L4K 3R6 | (905) 761-8581 |
| P T Industrial Electric Co 216 Rivermede Rd #1, Concord L4K 3M6 | (905) 669-5712 |
| P Plus P Electric Inc 162 Spyglass Hill Rd, Concord L4K 2K7 | (905) 669-2696 |
| Paynel Electrical Co Ltd 16 Spinnaker Way #3, Concord L4K 2T8 | (905) 669-1123 |
| Pnp Electric 40 Pippin Rd, Concord L4K 4M6 | (905) 760-0744 |
| Proto Electric Contracting Inc 499 Edgeley Blvd #12, Concord L4K 4H3 | (905) 660-9956 |
| Richview Electric Inc 665 Millway Ave #27, Concord L4K 3T8 | (905) 660-3745 |
| Riviera Electric 201 Drumlin Cir #8, Concord L4K 3E7 | (905) 738-1166 |
| Sacmar Electric Inc 14 Connie Cres, Concord L4K 2W8 | (905) 761-2006 |
| Saturn Electrical Co 400 Creditstone Rd #16, Concord L4K 3Z3 | (905) 660-1086 |
| Scan Electric Ltd 351 Spinnaker Way, Concord L4K 4N4 | (905) 669-1166 |
| Sentry Electric Inc 60 Saramia Cres #1, Concord L4K 4J7 | (416) 665-7294 |
| Tricin Electric Ltd 191 Caldari Rd, Concord L4K 4A1 | (905) 660-6977 |
| Stable Technical Svc Inc 259 Edgeley Blvd, Concord L4K 3Y5 | (905) 760-9318 |
| Sterling Electrical Contrs 178 Pennsylvania Ave #9, Concord L4K 4B1 | (905) 669-5242 |
| Fairlawn Electric 201 Spinnaker Way #15, Concord L4K 4C6 | (905) 761-6972 |
| Synchronous Electric Ltd 400 Creditstone Rd, Concord L4K 3Z3 | (905) 738-4386 |
| Terra Electric 145 Jardin Dr, Concord L4K 1X7 | (905) 738-0071 |
| Tri-Pas Electrical Ltd 241 Edgeley Blvd, Concord L4K 3Y6 | (905) 761-6140 |
| Triple-A-Electric & Mechanical 242 Applewood Cres, Concord L4K 4E5 | (905) 760-2332 |
| Ultrateck Electric 21 Bradwick Dr #1, Concord L4K 1K6 | (905) 761-6050 |
| Urban Electrical Contractors 8600 Keele St, Concord L4K 4H8 | (905) 669-0280 |
| Vince Electrical Contractor 400 Creditstone Rd #31, Concord L4K 3Z3 | (905) 761-7185 |
| Woods Electric Management Inc 147 Citation Dr, Concord L4K 2P8 | (905) 760-2270 |
| Electrotechnic Limted 20 Staffern Dr #17, Concord L4K 2Z7 | (905) 660-5445 |
| Brass Electrical Svc 28 Killaloe Rd, Concord L4K 2P2 | (905) 760-1920 |
| Campbell & Kennedy Electric 242 Applewood Cres, Concord L4K 4E5 | (905) 761-8550 |
| Capri Electric 603 Millway Ave, Concord L4K 3V1 | (905) 660-0489 |
| Cavan Electric Ltd 11561 Highway 27, Concord | (905) 893-9874 |
| City Wide Electrical Ltd 16 Spinnaker Way, Concord L4K 2T8 | (905) 660-0104 |
| De-Zine Studio Svc 328 North Rivermede Rd, Concord L4K 3N5 | (905) 760-2855 |
| Con-Cor Electrical 358 Edgeley Blvd, Concord L4K 3Y1 | (905) 669-4912 |
| Cse Corp 89 Edilcan Dr, Concord L4K 3S6 | (905) 660-1339 |
| De-Zine Electric Intl 328 North Rivermede Rd, Concord L4K 3N5 | (905) 760-9394 |
| Discovery Electrical Ontario 8201 Jane St, Concord L4K 5P2 | (905) 738-6939 |
| Douglas-James Esl Electrical 16 Spinnaker Way #2, Concord L4K 2T8 | (905) 761-9944 |
| Durcon Electric 310 Millway Ave, Concord L4K 3W3 | (905) 761-1834 |
| Edge Electric Ltd 201 Millway Ave #23, Concord L4K 5K8 | (905) 760-8200 |
| Ember Electric Inc 151 Applewood Cres, Concord L4K 4E3 | (905) 660-0400 |
| Emer Electric Ltd 102 Naughton Dr, Concord | (905) 770-0255 |
| Extreme Electrical Svc 30 Pennsylvania Ave, Concord L4K 4A5 | (905) 761-1485 |
| Falstaff Electrical Svc Ltd 60 Pippin Rd #43, Concord L4K 4M8 | (416) 663-8128 |