| Synthesis Concepts INC DBA Synthesis Custom Integrations | Jason Lee Ratzlaff | — | (805) 428 5678 | Other | Simi Valley · Ventura County | — | — |
| T & G Development | T & G Development | — | (805) 236 8690 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| T & H Compressor Repair Company INC | Mark Allen Notzka | — | (805) 653 0258 | Other | Ventura · Ventura County | — | — |
| T & S Fire Protection INC | Eric James Melanson | t.sfireprotectioninc@gmail.com | (805) 232 3216 | Other | Ventura · Ventura County | — | — |
| T A Marshall Co INC | Todd Alan Marshall | — | (805) 486 0436 | HVAC | Oxnard · Ventura County | — | — |
| T B Cabinets | T B Cabinets | — | (805) 797 0312 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| T Brooks Construction INC | Quinn Lee| Brooks Todd Lee Brooks | — | (805) 236 8358 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| T C C Construction Company | Jose Antonio Corral | — | (805) 432 5896 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| T C S Speciality Coatings | T C S Speciality Coatings | — | (213) 494 3426 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| T C Security & Fire Alarm Systems | Thomas Francis Crowley | — | (805) 559 3739 | Electricians | Simi Valley · Ventura County | — | — |
| T D Barrett / Mechanical Services | Todd David Barrett | — | (805) 587 9525 | HVAC | Simi Valley · Ventura County | — | — |
| T Famera Construction INC | Todd Alan Famera | — | (310) 259 8843 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| T J M Drywall | T J M Drywall | — | (805) 218 9958 | Other | Ventura · Ventura County | — | — |
| T L C Underground | Jhon Amado Demarino | ryanz@tlcunderground.co | (805) 748 6958 | Other | Oxnard · Ventura County | — | — |
| T L Martin Construction | Thomas Lee Martin | — | (818) 269 4051 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| T M C | T M C | — | (805) 490 0809 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| T M Co | Guillermo Antonio Vargas | — | (818) 535 7295 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| T M Electric | Tony Joe Mulville | employment@tmelectric.com | (805) 861 6629 | Electricians | Ventura · Ventura County | — | — |
| T M Environmental Services | Mansour Tony | — | (818) 963 0090 | Other | Simi Valley · Ventura County | — | — |
| T N C Tile And Stone | Dachavoot Promyart | — | (805) 432 0452 | Other | Moorpark · Ventura County | — | — |
| T R J Refrigeration INC | Michael Lee Sr Reutter | — | (805) 240 3434 | HVAC | Oxnard · Ventura County | — | — |
| T S J Electric | Timothy Scott Januszewski | — | (805) 890 6425 | Electricians | Camarillo · Ventura County | — | — |
| T Top Construction | Dan Derwin Fortuna | — | (805) 732 8714 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| T-bow Electric LLC | Jeremy Peter Thibault | — | (805) 501 7829 | Electricians | Simi Valley · Ventura County | — | — |
| T-top Plumbing Co INC | Scott Henry Santino | — | (805) 527 8867 | Other | Simi Valley · Ventura County | — | — |
| T.r.e.e. Real Estate | T.r.e.e. Real Estate | — | (805) 654-1413 | Property managers | Ventura · Ventura County | — | — |
| T2 Brothers Roofing INC | Eduardo Torres Jr Torres | — | (805) 401 9163 | Other roofers | Oxnard · Ventura County | — | — |
| T3 Construction INC | Troy Thomas Tilkens | — | (805) 340 1776 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Tab Technical Services INC | Todd Andrew Bermann | — | (805) 376 9900 | Other | Newbury Park · Ventura County | — | — |
| Tactical Mitigation Services LLC | Victoria Brianne Huml | — | (855) 482 2648 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Taft Electric Company | James Richard Eddy | info@taftelectric.com | (805) 642 0121 | Electricians | Ventura · Ventura County | — | — |
| Tajon Tile | Tajon Tile | — | (805) 746 1044 | Other | Camarillo · Ventura County | — | — |
| Tank Team INC | Richard Alan Maertz | — | (805) 432 0218 | Other | Camarillo · Ventura County | — | — |
| Tank's Plumbing | Tank's Plumbing | — | (805) 616 9380 | Other | Oxnard · Ventura County | — | — |
| Tank's Plumbing Services | David Paul Greene Tankersley | — | (805) 815 6071 | Other | Oxnard · Ventura County | — | — |
| Tapia's Pool And Spa Plumbing LLC | Juan Manuel Tapia Bedoy | — | (808) 833 3979 | Other | Simi Valley · Ventura County | — | — |
| Tarn Construction | Steve Daniel Tarn | info@tarnconstruction.com | (818) 359 4519 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Tasco Building And Design | Tasco Building And Design | — | (805) 407 2585 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Tate Construction & Development INC | Rodney Jaime Tate | — | (805) 620 2434 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Tate Kaplan Construction | Tate John Kaplan | — | (805) 207 5465 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |