| Business | Phone |
| Grand Terrace Building Dept 22795 Barton Rd # B, Grand Terrace 92313 | (909) 430-2250 |
| Grand Terrace City Council 22795 Barton Rd, Grand Terrace 92313 | (909) 430-2245 |
| Grand Terrace City Housing 22795 Barton Rd, Grand Terrace 92313 | (909) 430-2252 |
| Grand Terrace Code Enforcement 22795 Barton Rd, Grand Terrace 92313 | (909) 430-2229 |
| Grand Terrace Community Svc Grand Terrace 92313 | (909) 430-2201 |
| Grand Terrace Crime Prevention 22795 Barton Rd, Grand Terrace 92313 | (909) 430-2224 |
| Grand Terrace Senior's Info 22627 Grand Terrace Rd, Grand Terrace 92313 | (909) 824-1491 |