| Business | Phone |
| Guimar Contractors 12 Bradwick Dr, Thornhill | (905) 761-0027 |
| H & R Developments 7700 Bathurst St, Thornhill L4J 7Y3 | (905) 881-6949 |
| Harwood Construction Co 38 Ladyslipper Crt, Thornhill L3T 2S7 | (905) 889-2599 |
| Lan-Con Construction Ltd 410 Chrislea Rd, Thornhill | (905) 264-9046 |
| Life Construction Inc 330 Highway 7, Thornhill | (905) 882-2552 |
| Midtown Homes Inc 96 Bevshire Cir, Thornhill L4J 5C5 | (905) 889-3938 |
| Promenade Gatehouse 7420 Bathurst St, Thornhill L4J 6X4 | (905) 886-5414 |
| Belwood Construction 167 Applewood Cres, Thornhill | (905) 761-6901 |
| Darcom Construction Ltd 8600 Keele, Thornhill | (905) 760-8562 |
| Strongland Construction Ltd 1 Promenade Cir, Thornhill L4J 4P8 | (905) 731-7605 |
| Toram Contracting Inc 33 Glen Cameron Rd, Thornhill L3T 1N9 | (905) 771-1791 |
| Unique Carpentry & Repairs Ltd 232 Crestwood Rd, Thornhill L4J 1A9 | (905) 889-6189 |
| Wellbuilt Interiors Ltd 371 John St, Thornhill L3T 5W5 | (905) 881-9428 |
| Calder Hill Contracting Ltd 8 Cedar Ave, Thornhill L3T 3V9 | (905) 889-5004 |
| Carpet Gallery Inc 201 Spinnaker Way, Thornhill | (905) 761-5899 |
| Cnt Carpentry Ltd 73 Green Lane, Thornhill L3T 6K6 | (905) 764-3727 |
| Delmar Homes Ltd 200 Edgeley, Thornhill | (416) 991-5757 |
| Commerce Aluminum Bldg Product 41 Palmerston Dr, Thornhill L4J 7V8 | (905) 762-0657 |
| Concord Structural 8 Silver Brook Crt, Thornhill L3T 2J8 | (905) 764-2805 |
| Craig Briar Construction Ltd 28 Alcaine Crt, Thornhill L3T 2G7 | (905) 764-3301 |
| Danar Construction 42 Michael Crt, Thornhill L4J 3A9 | (905) 881-6708 |