| Business | Phone |
| Govers Engineers 3708 Mt Diablo Blvd # 100, Lafayette 94549 | (925) 284-5441 |
| David B Hop Pe 3620 Mt Diablo Blvd # 202, Lafayette 94549 | (925) 962-0823 |
| Humann Co 1021 Brown Ave, Lafayette 94549 | (925) 283-5000 |
| Schell & Martin Inc 3377 Mt Diablo Blvd, Lafayette 94549 | (925) 283-8111 |
| Vegvary & Vegvary 3527 Mount Diablo Blvd # 368, Lafayette 94549 | (925) 947-1051 |
| Govers Engineers 3708 Mount Diablo Blvd # 100, Lafayette 94549 | (925) 284-5441 |
| Robert Schwein 3397 Mt Diablo Blvd # E, Lafayette 94549 | (925) 284-3313 |