| Business | Phone |
| Allen & Sherriff Architects 10350 Yonge St #200, Richmond Hill L4C 5K9 | (905) 884-1117 |
| Hirschfield Consulting Inc 51 Oak Ave, Richmond Hill L4C 6R5 | (905) 882-9979 |
| John Shuki Lau Inc 350 Highway 7 E #Ph3, Richmond Hill L4B 3N2 | (905) 707-0818 |
| Kuan, Eugene 9251 Yonge St, Richmond Hill L4C 9T3 | (905) 770-9050 |
| Louis Cheung Architects Inc 9011 Leslie St, Richmond Hill L4B 3B6 | (905) 731-5434 |
| Robert Segarra Inc 145 Garden Ave, Richmond Hill L4C 6L7 | (905) 764-7652 |
| Ryan Co Architect 154 Mill St, Richmond Hill L4C 4A9 | (905) 737-8668 |
| Tjan, David S 19 Alexandra Wood, Richmond Hill L4B 2L1 | (905) 737-5477 |
| Ypes, Marilyn 1343 Stouffville Rd, Richmond Hill L4E 3S5 | (905) 773-6027 |
| Dzikowski Architects Inc 450 Judlea Crt, Richmond Hill L4C 2X9 | (905) 508-4377 |