| Business | Phone |
| Tbci Concrete Structures 11335 Louise Ave, Granada Hills 91344 | (818) 363-1455 |
| Blaha Construction & Dev Po Box 7705, Granada Hills 91344 | (818) 366-2575 |
| Darnell Construction Granada Hills 91344 | (818) 363-8182 |
| Valley Concrete 17817 Chatsworth St, Granada Hills 91344 | (818) 360-8109 |