| Business | Phone |
| Armando Ruiz & Assoc 718 N Diamond Bar Blvd, Diamond Bar 91765 | (909) 861-8173 |
| Dante Aguilos Architects 732 N Diamond Bar Blvd # 228, Diamond Bar 91765 | (909) 860-5853 |
| Jonathan Park Architect Assoc 3333 S Brea Canyon Rd, Diamond Bar 91765 | (909) 444-7712 |
| Prosperity Consulting Group 2145 S Brea Canyon Rd, Diamond Bar 91765 | (909) 869-6388 |
| Tani Wayne Architects 259 Gentle Springs Ln # 134, Diamond Bar 91765 | (909) 861-1755 |
| Architecture Refined Corp 556 N Diamond Bar Blvd # 305, Diamond Bar 91765 | (909) 860-2888 |
| Tim Good 23864 Minnequa Dr, Diamond Bar 91765 | (909) 860-8374 |