| Business | Phone |
| Engineering Services Dept 3675 Mt Diablo Blvd # 210, Lafayette 94549 | (925) 284-1951 |
| Lafayette City Office 3675 Mt Diablo Blvd # 210, Lafayette 94549 | (925) 284-1968 |
| Lafayette City Planning Office 3675 Mt Diablo Blvd # 210, Lafayette 94549 | (925) 284-1976 |