| Trademark Concrete Systems INC | Lance Allen Boyer | — | (805) 207 0734 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Trademark Tile INC | Timothy Karl Von Borzestowski | interested@domainmarket.com | (805) 375 7770 | Other | Newbury Park · Ventura County | — | — |
| Tradition Construction INC | Brandon Shad Tribble | — | (818) 621 8102 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Traditional Floors | Traditional Floors | — | (805) 499 0927 | Other | Newbury Park · Ventura County | — | — |
| Trak Environmental Group INC | Bradford Scott Newman | — | (805) 650 5333 | Other | Ventura · Ventura County | — | — |
| Trans Electric LLC | Dan Emil Platon | — | (714) 381 4900 | Electricians | Thousand Oaks · Ventura County | — | — |
| Transformed Drywall INC | Antonio Lopez Sotelo | impallari@gmail.com | (805) 477 8978 | Other | Oxnard · Ventura County | — | — |
| Travis Agricultural Construction INC | Travis Clay Bartle | — | (805) 647 7211 | Other | Ventura · Ventura County | — | — |
| Travis Junge Pool Service And Repair INC | Travis Wayne Junge | — | (805) 795 5200 | Pool | Simi Valley · Ventura County | — | — |
| Travis Robert Nunn | Travis Robert Nunn | — | (805) 388 1234 | Other | Camarillo · Ventura County | — | — |
| Travis Stoke Construction INC | Travis Stoke Castillo | — | (805) 231 4624 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Treasure Island Plumbing | Treasure Island Plumbing | — | (805) 304 6966 | Other | Simi Valley · Ventura County | — | — |
| Tree City Arborist INC | Nicholas Chase Romero | anc@treecityarborist.com | (805) 415 8050 | Tree | Ventura · Ventura County | — | — |
| Treeco INC | Caleb Slowik | — | (805) 652 0404 | Other | Ventura · Ventura County | — | — |
| Treehouse Landscape Design | Treehouse Landscape Design | — | (805) 901 8312 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Treescapes | Jerry Don Monahan | — | (805) 484 5849 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Treloar Built INC | Justin Jeffrey Alle Treloar | — | (805) 358 1532 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Trendex Corp | William John Iv Vincent | — | (818) 407 9600 | Other | Simi Valley · Ventura County | — | — |
| Tres Toros Construction INC | Marco Antonio Navarro Estrada | — | (805) 668 8486 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Tri - County Welding Services INC | William Patrick Mac Farlane | — | (805) 495 8185 | Other | Thousand Oaks · Ventura County | — | — |
| Tri Co Construction INC | Nicolas G Hernandez | info@triconstruction.com | (617) 288-1255 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Tri County Electric | Gabriel Lopez Hernandez | colleen@tricountyelectric.com | (805) 746 8613 | Electricians | Ventura · Ventura County | — | — |
| Tri County Power Washing | Tri County Power Washing | — | (805) 312 0626 | Other | Camarillo · Ventura County | — | — |
| Tri County Quality Construction | Eliseo D Mondragon Pillado | — | (805) 827 1671 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Tri County Roofing Company | David Sr Medina | — | (805) 200 1486 | Other roofers | Port Hueneme · Ventura County | — | — |
| Tri County Roofing INC | Antonio Espino | — | (805) 248 8168 | Other roofers | Oxnard · Ventura County | — | — |
| Tri Tech Electric | John Michael Templin | — | (805) 659 3393 | Electricians | Ventura · Ventura County | — | — |
| Tri-county Industrial Electric INC | John Jay Grindle | — | (805) 495 1745 | Electricians | Thousand Oaks · Ventura County | — | — |
| Tri-county Plumbing Co | Victor Hugo Gutierrez | — | (805) 529 0592 | Other | Moorpark · Ventura County | — | — |
| Tri-valley Drilling Service INC | Tony Navarrete Raya | — | (805) 643 3144 | Other | Ventura · Ventura County | — | — |
| Tri-valley Pool & Spa INC | Craig Alan Kircher | — | (805) 432 4731 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Tribble Construction | Richard Bryan Tribble | — | (805) 218 1410 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Tricounty Services | Alfred Virjilio Edwards | — | (805) 585 3844 | HVAC | Ventura · Ventura County | — | — |
| Trim Electric | Eric Tyson Mc Calister | — | (805) 320 3584 | Electricians | Camarillo · Ventura County | — | — |
| Trim To Fit | Trim To Fit | — | (805) 209 9725 | Other | Simi Valley · Ventura County | — | — |
| Trio Construction & Remodel INC | Christopher Castruita | — | (805) 832 9091 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Triple A Electric INC | Agvan Alex Abramian | inquiries@tripleaelectric.com | (818) 437 0566 | Electricians | Simi Valley · Ventura County | — | — |
| Tristan Real Estate Services | Andrew John Tristan | — | (805) 813 6367 | Electricians | Simi Valley · Ventura County | — | — |
| Tristar Finish Carpentry | Tristan Lovell Woolsey | — | (805) 427 2777 | Other | Ventura · Ventura County | — | — |
| Triton Environmental And Restoration INC | Julie Anne Perez | — | (805) 223 0296 | GC, remodel, ADU | Fillmore · Ventura County | — | — |