| Top Of The Ladder Painting & Decorating | Gary Michael Lodike | — | (925) 766 7161 | Windows, patio, painters | Walnut Creek · Contra Costa County | — | — |
| Top Power Electric LLC | Alex David Alvarez | — | (650) 218 7442 | Electricians | Antioch · Contra Costa County | — | — |
| Top Pro Plumbing Co | Su Liang | — | (510) 524 8938 | Other | El Cerrito · Contra Costa County | — | — |
| Top Quality Construction | Jaiderman Ramon Diaz De Leon | — | (415) 374 1027 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Top Remodeling & Design INC | Jose Ignacio Bravo Rojo | info@topremodelingdesign.com | (925) 510 2888 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Top Roof Roofing | Zamano Jaime Lopez | — | (925) 206 7829 | Other roofers | Concord · Contra Costa County | — | — |
| Top Tier Roofing Solutions INC | Neftali Salvador Sanchez | — | (925) 329 5690 | Other roofers | Oakley · Contra Costa County | — | — |
| Tor Rail And Gate Fabricators Inc. | Manuel Enrique Pacajoj Xia | — | (925) 497 0061 | Other | Concord · Contra Costa County | — | — |
| Torres Construction | Torres Ventura David | — | (925) 529 2866 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Torres Quality Seal Coating & Striping | Torres Ruiz Servando | — | (650) 382 9890 | Other | Concord · Contra Costa County | — | — |
| Total Electric | Paul Wilson Tugbenyoh | — | (925) 864 6132 | Electricians | Pittsburg · Contra Costa County | — | — |
| Total Plumbing Services & Engineering | William Gerardo Caceres | — | (510) 804 4918 | Other | El Sobrante · Contra Costa County | — | — |
| Toupin Construction Corporation | Pamela Sue Toupin | notes@toupinconstruction.com | (925) 937 4200 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Tower & Scrubber Solutions LLC | Charles Ray Wilcox | info@towerscrubbersolutions.com | (415) 889 3661 | HVAC | Walnut Creek · Contra Costa County | — | — |
| Town & Country Pool Service INC | Fabian Guerra | — | (925) 363 9506 | Pool | Pleasant Hill · Contra Costa County | — | — |
| Toyo Demolition | Toyo Demolition | — | (925) 252 6750 | Other | Pittsburg · Contra Costa County | — | — |
| Toys Landscaping Contractors LLC | Jonathan Ayala | — | (925) 681 9110 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Tp Pavers Services INC | Hugo Guimaraes Aparecida | — | (510) 253 6230 | Other | Pinole · Contra Costa County | — | — |
| Tracey A Blume | Tracey A Blume | — | (925) 323 9081 | Windows, patio, painters | Lafayette · Contra Costa County | — | — |
| Tractor Service | James Kenneth Sr Smith | — | (925) 682 2324 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Tracy Anthony General Contractor | Tracy Anthony General Contractor | — | (510) 599 9528 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Trademark Homes Ltd | Frank Joe Jr Pucci | — | (925) 855 1676 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Traffic Control Pros | Jeffrey Craig Bell | — | (925) 270 4580 | Other | Concord · Contra Costa County | — | — |
| Tran International | Tran International | — | (415) 760 6904 | Other | Oakley · Contra Costa County | — | — |
| Transformations Painting | Transformations Painting | — | (925) 228 4879 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Travalini Incorporated | Ryan Lee Travalini | — | (510) 758 8079 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Traverso Tree Service INC | Brian Wayne Fenske | office@traversotree.com | (925) 930 7901 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Travis Construction | James Travis Schlosser | — | (925) 330 8069 | Other | Martinez · Contra Costa County | — | — |
| Travis Eaton | Travis Eaton | — | (925) 899 7438 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Travis S Raciti Construction | Travis Santo Raciti | — | (925) 899 3985 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Trax Trax INC | John Joseph Fouhy | — | (925) 682 9499 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Treasure Construction | Robert Thomas Dopp | info@treasure-construction.com | (510) 701 1609 | GC, remodel, ADU | Pinole · Contra Costa County | — | — |
| Trebco Construction | Paul Timothy Trzebiatowski | — | (925) 658 0447 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Tree West | Michael Hugh Mc Call | admin@tree-west.com | (925) 363 8100 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Tree Wise | Tree Wise | — | (925) 838 8733 | Windows, patio, painters | Danville · Contra Costa County | — | — |
| Trees Landscape Construction | Frank Jay Iii Mcguire | — | (925) 228 2400 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Tremayne Technologies | Tremayne Technologies | — | (925) 212 1605 | Other | Lafayette · Contra Costa County | — | — |
| Trenton P Mc Linn | Trenton P Mc Linn | — | (925) 381 5398 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Trevor G Macarewich | Trevor G Macarewich | — | (925) 360 2060 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| Trevor Slack Construction | Trevor Alan Slack | — | (925) 525 4400 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |