| Business | Phone |
| Ccs Planning & Engineering 1440 Broadway # 402, Oakland 94612 | (510) 267-1800 |
| Citilabs 312 Clay St # 180, Oakland 94607 | (510) 583-7330 |
| Dks Assoc 1956 Webster St # 300, Oakland 94612 | (510) 763-2061 |
| Dowling Associates 180 Grand Ave # 250, Oakland 94612 | (510) 839-1742 |
| T Y Lin Intl 1440 Broadway # 402, Oakland 94612 | (510) 267-1800 |