| Business | Phone |
| Brentwood City Bldg Inspection 104 Oak St, Brentwood 94513 | (925) 516-5405 |
| Brentwood City Engineering 708 3rd St, Brentwood 94513 | (925) 516-5420 |
| Brentwood City General Info 708 3rd St, Brentwood 94513 | (925) 516-5400 |
| Brentwood Engineering 708 3rd St, Brentwood 94513 | (925) 634-6920 |
| Brentwood City Building Dept 104 Oak St, Brentwood 94513 | (925) 516-5406 |
| Brentwood City Human Resources 708 3rd St, Brentwood 94513 | (925) 516-5191 |
| Brentwood City Planning 104 Oak St, Brentwood 94513 | (925) 634-6905 |
| City Of Brentwood 195 Griffith Ln, Brentwood 94513 | (925) 634-1681 |