| Business | Phone |
| Biland Construction 2363 Boulevard Cir, Walnut Creek 94595 | (707) 374-5703 |
| Source California Energy Svc 1204 Alpine Rd # 1, Walnut Creek 94596 | (925) 746-7500 |
| Crinnion Construction 1417 Murwood Dr, Walnut Creek 94596 | (925) 934-8882 |
| Integrated Profect Svc 2125 Oak Grove Rd, Walnut Creek 94598 | (925) 280-0525 |
| Raymundo Engineering 488 N Wiget Ln, Walnut Creek 94598 | (925) 988-0172 |