| Business | Phone |
| Bancon Builders 5712 Medallion Ct, Castro Valley 94552 | (510) 537-9444 |
| Cameron Construction Mgmt 20212 Redwood Rd, Castro Valley 94546 | (925) 484-5100 |
| Cbk Designs Castro Valley 94546 | (510) 538-6385 |
| Gary Lyons Construction Mgmt Po Box 20146, Castro Valley 94546 | (510) 581-8661 |