| Business | Phone |
| Donald E Ward Civil Engineer 114 S Mill St, Tehachapi 93561 | (661) 822-7521 |
| Alta Engineering Surveying 20817 South St, Tehachapi 93561 | (661) 822-6414 |
| Terrain Enterprises 1582 Goodrick Dr, Tehachapi 93561 | (661) 823-1234 |
| House Plans 20376 Rice Dr, Tehachapi 93561 | (661) 822-3661 |