| Top West Electric INC | Yang Chris | — | (510) 207 2954 | Electricians | Dublin · Alameda County | — | — |
| Top2 Builders Corporation | Covarrubias Florentino Guerrero | — | (510) 999 7663 | Other roofers | Hayward · Alameda County | — | — |
| Topline Fabrications & Welding | Barajas Jorge Cisneros | — | (510) 432 5982 | Other | Fremont · Alameda County | — | — |
| Topnotch Builders | Topnotch Builders | — | (877) 320 1999 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Toptec Construction INC | Chen Zehao | — | (415) 696 2983 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Toptech Electrical LLC | Alexis Gonzalez | — | (925) 525 0146 | Electricians | Livermore · Alameda County | — | — |
| Topview Construction Group INC | Tonny Kin Bew Yee | — | (415) 999 1163 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Toros Demolition | Toros Demolition | — | (650) 289 8169 | Other | Hayward · Alameda County | — | — |
| Torque Electric Co | James Alexander Vickers | — | (510) 461 9129 | Electricians | Fremont · Alameda County | — | — |
| Toscano Builder | Toscano Builder | — | (510) 502 2878 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Toscano's Construction INC | Toscano-birrueta Rafael | — | (510) 213 4610 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Total Construction Solutions | Wang Kaiwei | — | (925) 386 0285 | Other roofers | Berkeley · Alameda County | — | — |
| Total Floors INC | Ahmad Masoud Faizi | — | (925) 292 1494 | Other | Livermore · Alameda County | — | — |
| Total Industries | Mark Richard Andres | — | (510) 755 2538 | Other | Livermore · Alameda County | — | — |
| Total Underground Construction | Joseph Ryan Dometita | — | (415) 350 3363 | Other | San Leandro · Alameda County | — | — |
| Total Works Corp | Frazier Angel Goopar Bustamante | — | (510) 269 2683 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Toto Heating And Cooling | Dor Lantzano | — | (408) 480 7050 | HVAC | Fremont · Alameda County | — | — |
| Toto's Plumbing INC | Raul Armando Hernandez | — | (510) 292 6558 | Other | Oakland · Alameda County | — | — |
| Toucan Electrical | Tobin Joseph Holl-valdez | — | (510) 206 6714 | Electricians | Berkeley · Alameda County | — | — |
| Toucan Remodeling | Toucan Remodeling | — | (510) 926 0585 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Tougher Than Tough Construction | Moncada Ruben | — | (650) 245 1723 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Tovi Corp | Thomas Biju Isaac | — | (858) 705 4455 | HVAC | Dublin · Alameda County | — | — |
| Town Bizz Builders LLC | Evan Bryant Haarz | — | (510) 914 0457 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Towne Electric Company INC | Randell Craig Towne | — | (510) 483 1635 | Electricians | San Leandro · Alameda County | — | — |
| Tpt Construction Corporation | Kenny Vong | — | (626) 780 2468 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Tr Construction INC | Gary Andre Deskins | info@tr-construction.com | (510) 709 7198 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Tradequip Corporation | Mehul Mukundbhai Patel | — | (707) 292 2002 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Tradewell Construction | Sever Salim | — | (510) 499 1881 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Tradition Roofing Co | Fernando Franco Maciel | — | (510) 914 0348 | Other roofers | San Leandro · Alameda County | — | — |
| Tran's Landscape | Tran's Landscape | — | (650) 440 9042 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Transbay Fire Protection INC | Hossein Tabatabai | — | (925) 846 9484 | Other | Pleasanton · Alameda County | — | — |
| Transformation Construction & Design INC | Kevin Dale Donahue | — | (510) 461 4435 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Trav Con | Trav Con | — | (510) 612 0425 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Traveling Man's Construction Co | Jonathan David Staples | — | (510) 691 3788 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Travis J Simmons | Travis J Simmons | — | (510) 670 9504 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Travis Landscape Contracting | Travis Carl Robert Fohl | — | (510) 427 3209 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Treasure Island Woodworks Company | Brandon Jon Canchola | — | (510) 918 4154 | Other | Oakland · Alameda County | — | — |
| Tree Decisions | Tree Decisions | — | (510) 649 9291 | Tree | Berkeley · Alameda County | — | — |
| Treeschool Landscaping | Treeschool Landscaping | — | (415) 254 2801 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Trejo Painting | Trejo Painting | — | (510) 697 0938 | Windows, patio, painters | Albany · Alameda County | — | — |