| Business | Phone |
| Mbm Structural Inc 8300 Tampa Ave # G, Northridge 91324 | (818) 772-6597 |
| Warling & Assoc 11145 Tampa Ave # 16a, Northridge 91326 | (818) 363-8272 |
| Raffi Abkarian & Assoc 18763 Vintage St, Northridge 91324 | (818) 727-0631 |
| Richard R Bradshaw Consultants 17300 Ballinger St, Northridge 91325 | (818) 772-1810 |