| Southern California Developers | Southern California Developers | — | (760) 556 0436 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Southern California Installers | Southern California Installers | — | (760) 455 3380 | Other | Imperial · Imperial County | — | — |
| Steve Clark Floor Covering | Steve Clark Floor Covering | — | (760) 996 1921 | GC, remodel, ADU | Holtville · Imperial County | — | — |
| Stills Electric | Kenneth James Stills | — | (760) 344 1089 | Electricians | Brawley · Imperial County | — | — |
| Stills Plumbing | Stills Plumbing | — | (760) 427 3365 | Other | Imperial · Imperial County | — | — |
| Stoffel Electric | Stoffel Alex | — | (760) 604 8479 | Electricians | El Centro · Imperial County | — | — |
| Sturdevant Construction | Jeffrey Charles Sr Sturdevant | — | (760) 427 9743 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Sun Landscape INC | Lynette Kay Mari | — | (760) 356 2442 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Superior Air | Superior Air | — | (760) 888 0647 | HVAC | Brawley · Imperial County | — | — |
| Supreme Drywall INC | Jesus Venustiano Llamas | — | (760) 679 4069 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Supreme Electrical Contracting | Ana Isabel Paros | — | (760) 427 8001 | Electricians | El Centro · Imperial County | — | — |
| T - Phase Electric INC | Sabino Jr Zavala | info@tphaseelectric.com | (760) 455 1097 | Electricians | El Centro · Imperial County | — | — |
| T B A Plumbing | T B A Plumbing | — | (858) 568 5766 | Other | Ocotillo · Imperial County | — | — |
| T G E Construction | Garcia Salvador | — | (562) 843 1830 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Tabarez General Contracting / Building Contractor | Julian Alarcon Tabarez | — | (760) 337 1224 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Terry Robertson INC DBA A & R Construction | Terry Allen Robertson | — | (760) 344 4653 | Other | Brawley · Imperial County | — | — |
| The Baja's Painting | The Baja's Painting | — | (760) 259 5211 | Windows, patio, painters | El Centro · Imperial County | — | — |
| The Cooling And Heating Specialists INC | Jorge David Ramirez | chs.hvacpros@gmail.com | (760) 353 9500 | HVAC | Holtville · Imperial County | — | — |
| The Detlef Steinke & Associates Corporation | Detlef Richard Steinke | — | (310) 498 0367 | GC, remodel, ADU | Palos Verdes · Imperial County | — | — |
| The Home Inspectors Group Inc. | The Home Inspectors Group Inc. | — | (562) 548-5300 | Inspectors | Whittier · Imperial County | — | — |
| Three Gen Stucco | Three Gen Stucco | — | (619) 558 9880 | Other | Imperial · Imperial County | — | — |
| Timmothy Wallen | Timmothy Wallen | — | (760) 355 1703 | Electricians | Imperial · Imperial County | — | — |
| Toledo Quality Painting | Oscar Manuel Toledo | — | (760) 879 4578 | Windows, patio, painters | El Centro · Imperial County | — | — |
| Tom Watson INC | Linda Layon Watson | — | (760) 352 7776 | Electricians | El Centro · Imperial County | — | — |
| Top Builders Construction INC | Al Bahahdi Allal | hello@topbuildersconstruction.com | (760) 693 5233 | GC, remodel, ADU | El Centro · Imperial County | — | — |
| Torres Construction | Torres Solano Natalia | — | (442) 250 2802 | GC, remodel, ADU | Calexico · Imperial County | — | — |
| Total Industries INC | Joshua Anthony Quintero | — | (760) 457 8998 | Other | Imperial · Imperial County | — | — |
| Total Technology INC | Felipe Gerardo Agatep | info@totaltechnology.com | (760) 351 9082 | Other | Westmorland · Imperial County | — | — |
| Tres Electric | Jose V Rojas | — | (760) 562 1826 | Electricians | Brawley · Imperial County | — | — |
| Trily Quality Builders | Trily Quality Builders | — | (858) 518 1681 | GC, remodel, ADU | Niland · Imperial County | — | — |
| Trone Construction | Nick Louis Trone | — | (530) 957 0542 | GC, remodel, ADU | Westmorland · Imperial County | — | — |
| Twg General Contractors INC | Timothy Walter Gaddis | — | (760) 353 6340 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Ultra Plastering Corp | Gustavo Chavez | — | (951) 203 1303 | Other | El Centro · Imperial County | — | — |
| Valley Auto Glass | Valley Auto Glass | — | (760) 357 3288 | Windows, patio, painters | Calexico · Imperial County | — | — |
| Valley Concrete | Valley Concrete | dan@valleyconc.com | (760) 890 8242 | Other | Calexico · Imperial County | — | — |
| Valley Performance Metal Welding | Valley Performance Metal Welding | — | (442) 283 3350 | Other | Calexico · Imperial County | — | — |
| Valley Petroleum Equipment INC | Brian Daniel Llamas | — | (760) 355 4230 | Other | El Centro · Imperial County | — | — |
| Vance Allen Construction | Ernest Vance Allen | — | (760) 355 2602 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Vertex Builders | Russell Allen Roben | — | (760) 498 6305 | GC, remodel, ADU | Imperial · Imperial County | — | — |
| Vgl Construction INC | Robert Michael Vogel | — | (760) 455 3065 | Electricians | El Centro · Imperial County | — | — |