| Business | Phone |
| John Carter Douglas Ltd 24 Castle Harbour Lane, Thornhill L3T 3A2 | (905) 881-0726 |
| Vladimir Krcmar Ltd 1137 Centre St, Thornhill L4J 3M6 | (905) 738-0053 |
| Krcmar Surveyors Ltd 1137 Centre St, Thornhill L4J 3M6 | (905) 264-2780 |
| Kromar Vladimir Ltd 1137 Centre St, Thornhill L4J 3M6 | (416) 233-6111 |
| Mc Bain & Carmichael Ltd 30 Waggoners Wells Lane, Thornhill L3T 4K3 | (905) 881-0074 |
| Sexton Mc Kay Ltd 12 Centre St, Thornhill L4J 1E9 | (905) 889-9103 |