| Top Of The Town | Top Of The Town | — | (707) 374 6994 | Other | Rio Vista · Solano County | — | — |
| Top Quality Painting | Top Quality Painting | — | (707) 384 4750 | Windows, patio, painters | Fairfield · Solano County | — | — |
| Top Rated Plumbing & Remodeling | Anthony Clayton Langes | — | (707) 450 5372 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Top Tier Traffic Control | Joseph Raymond Contreras | — | (510) 803 9125 | Other | Fairfield · Solano County | — | — |
| Torres Construction | Torres Heliodoro | — | (707) 337 6579 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Torres Project Management INC | Jonathan Alexis Torres Gomez | — | (530) 231 2603 | GC, remodel, ADU | Dixon · Solano County | — | — |
| Tosch Construction INC | Neal James Tosch | sebastian@aldusleaf.org | (707) 246 0601 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Total Trades Integrated Welding & Construction LLC | Williams Javier Valera Teran | — | (831) 325 5265 | GC, remodel, ADU | Dixon · Solano County | — | — |
| Towers Ec | Towers Ec | — | (707) 803 6332 | Electricians | Vacaville · Solano County | — | — |
| Toys Electric | Espinoza Sandoval Saul | — | (510) 328 5829 | Electricians | Vallejo · Solano County | — | — |
| Tps | Daniel Michael Grech | — | (707) 208 8379 | Other | Vacaville · Solano County | — | — |
| Tradewinds Cooling Limited Liability Company | Mathew Joseph Hamilton | — | (707) 435 3290 | HVAC | Fairfield · Solano County | — | — |
| Traditional Painting Pro LLC | Gustavo Eduardo Aguiar | — | (707) 365 3521 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Tree Master And Rapid Shred | David Lincoln Dani Engel | — | (925) 497 5787 | Tree | Vallejo · Solano County | — | — |
| Tri - City Fence Company INC | Dennis Dale Hammer | sales@tricityfence.com | (707) 644 5764 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Tri - City Glass | Tri - City Glass | — | (707) 426 6184 | Windows, patio, painters | Suisun City · Solano County | — | — |
| Tri Valley Electric | James Dave Tamargo | — | (707) 333 9133 | Electricians | Vallejo · Solano County | — | — |
| Triple J Electric LLC | Jerome Joseph Iv Brannigan | — | (707) 333 4576 | Electricians | Vacaville · Solano County | — | — |
| Triple T Rejuvenation LLC | Fredrick L Thorn | info@tripletrejuvenation.com | (707) 914 1959 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Tritan Electric | Gregory Scott Wildermuth | — | (707) 748 4249 | Electricians | Benicia · Solano County | — | — |
| Trivial LLC | Ernesto Chavarria | — | (951) 537 7797 | Electricians | Rio Vista · Solano County | — | — |
| True Blue Plumbing Co | Marcell David Lawson | — | (707) 775 8514 | Other | Fairfield · Solano County | — | — |
| True Craftsmen LLC | Jose Manuel Hernandez | — | (510) 672 5660 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| True Form Contracting Group INC | Richard Anderson Elliott | — | (707) 563 7535 | GC, remodel, ADU | Rio Vista · Solano County | — | — |
| True Integrity Builder | True Integrity Builder | — | (209) 471 9596 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| True Nature Landscaping Management | True Nature Landscaping Management | — | (707) 853 2106 | Windows, patio, painters | Fairfield · Solano County | — | — |
| True Value Plumbing Co | Jarrod Scott Hardy | — | (707) 249 3361 | Other | Dixon · Solano County | — | — |
| Trustworthy Data Company | Qadir Jihad Al-Amin | — | (510) 435 8854 | Other | Vallejo · Solano County | — | — |
| Tuan Tran | Tuan Tran | — | (707) 643 8309 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Tucker Bay Construction | Andrew Paul Richter | — | (516) 543 9681 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Tulio Iglesias | Tulio Iglesias | — | (510) 691 1496 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Tupou Construction INC | Peter Cherardi Tupou | — | (510) 685 6858 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Turfworks INC | Gregory Scott Anderson | sales@turfworks.com | (707) 452 9957 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Turner Electric | David Allen Turner | deb@turnerelectric.com | (805) 962-9986 | Electricians | Vallejo · Solano County | — | — |
| Two Brothers Pool & Spa Service | Ron Lee Mcbride | — | (510) 669 1880 | Pool | Vacaville · Solano County | — | — |
| Tyler Anthony Ludlow | Tyler Anthony Ludlow | — | (925) 212 0526 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Tyrrell Plumbing And Mechanical INC | Timothy Thomas Tyrrell | — | (707) 449 6368 | Other | Vacaville · Solano County | — | — |
| Tytan Construction And Networking LLC | Rodolfo Jr Sanchez | — | (510) 965 8786 | Other | Vallejo · Solano County | — | — |
| U C Haulers | U C Haulers | — | (510) 719 7203 | Other | Vacaville · Solano County | — | — |
| Ulloa's Cabinets | Ulloa's Cabinets | — | (707) 373 3827 | Other | Vallejo · Solano County | — | — |