| Business | Phone |
| Armadale Properties Ltd 180 Renfrew Dr #100, Markham L3R 9Z2 | (905) 477-8000 |
| Granborough Developments Ltd 7030 Woodbine Ave, Markham L3R 6G2 | (905) 477-4168 |
| Joseph Chiavatti Ltd 3160 Steeles Ave E, Markham L3R 4G9 | (905) 475-4833 |
| Lambda Properties Ltd 300 Don Park Rd #9, Markham L3R 3A1 | (905) 475-1044 |
| Metrosquare Development Corp 3636 Steeles Ave E, Markham L3R 1K9 | (905) 940-8978 |
| Milestone Group 590 Alden Rd, Markham L3R 8N2 | (905) 305-1707 |
| Parkdick Enterprises 80 Acadia Ave, Markham L3R 9V1 | (905) 477-7221 |
| R Reusse Construction Co Ltd 90 Allstate Pky, Markham L3R 6H3 | (905) 475-0515 |
| Raystone-Wellington 5871 Highway 7, Markham L3P 1A3 | (905) 472-6570 |
| Bentall Real Estate Svc Ltd 50 Acadia Ave, Markham L3R 0B3 | (905) 940-9357 |
| Sylco Properties Inc 60 Centurian Dr #202, Markham L3R 9R2 | (905) 479-7377 |
| Dgf Group Of Companies 1 Pingel Rd, Markham L6B 1B7 | (905) 472-7732 |
| Brookfield Homes Ltd 7676 Woodbine Ave, Markham L3R 2N2 | (905) 477-5111 |
| David-Paul Holdings Inc 800 Denison St #16, Markham L3R 5M9 | (905) 475-6240 |