| Business | Phone |
| Gullo Brothers Concrete Ltd 36 Proctor Ave, Thornhill L3T 1M5 | (905) 881-6762 |
| Mannix Construction 145 Langstaff Rd E, Thornhill L3T 3M6 | (905) 709-8866 |
| Vidome Construction Ltd 107 Langstaff Rd E, Thornhill L3T 3M5 | (905) 881-7527 |
| Vta Construction Ltd 107 Langstaff Rd E, Thornhill L3T 3M5 | (905) 881-9858 |
| G E Rockett Construction 11 Meadowview Ave, Thornhill L3T 1K5 | (905) 889-4729 |
| Waterproofing/Thornhill Contractors/Waterproofing Thornhill,Richmond Hill,Bolton,Woodbridge, Thornhill L3T 1L6 | (416) 251-8465 |
| Waterproofing/Thornhill Contractors/Waterproofing 1-888-474-7101 Thornhill, Markham, Etobicoke, Richmond Hill, Thornhill L3T 7L2 | (888) 474-7101 |
| Aquaseal Basement Waterproofing Thornhill Thornhill,Toronto,Bradford,Brampton, Thornhill L3T 1L6 | (416) 251-8465 |