| T K Construction | Kamali Tahmoures | — | (650) 906 3334 | GC, remodel, ADU | Lafayette · Contra Costa County | — | — |
| T L Tile & Stone | T L Tile & Stone | — | (650) 347 4977 | Other | Brentwood · Contra Costa County | — | — |
| T N B Construction | Brian Wayne Swisher | — | (925) 757 3660 | Other | Antioch · Contra Costa County | — | — |
| T N Remodeling | T N Remodeling | — | (925) 323 5065 | GC, remodel, ADU | Pacheco · Contra Costa County | — | — |
| T N T Fire Protection INC | Thomas George Peterson | — | (925) 484 5157 | Other | Antioch · Contra Costa County | — | — |
| T N Telecom | T N Telecom | — | (510) 693 7334 | Other | Concord · Contra Costa County | — | — |
| T P G Environmental | T P G Environmental | agustinamingote@gmail.com | (510) 719 7895 | Other | Richmond · Contra Costa County | — | — |
| T R Loebel Construction | Tod Richard Jr Loebel | — | (925) 301 6196 | Other | Martinez · Contra Costa County | — | — |
| T S C Construction Co | Sum Tsz Cheung | — | (510) 325 8090 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| T Scully Construction | Timothy Patrick Scully | — | (510) 418 2180 | GC, remodel, ADU | Kensington · Contra Costa County | — | — |
| T Torson Backhoe INC | Travis Allan Torson | — | (925) 383 4596 | Other | Concord · Contra Costa County | — | — |
| T Travalini Construction INC | Trevor Al Travalini | — | (925) 584 9530 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| T W Frisch Construction INC | Travis William Frisch | — | (650) 346 5028 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| T Z Floors | T Z Floors | — | (925) 550 6359 | Other | Concord · Contra Costa County | — | — |
| T-h Construction | Terry Alan Holcomb | — | (925) 933 5566 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| T45 Construction INC | Juan Alberto Lopez | — | (510) 708 0048 | GC, remodel, ADU | Pinole · Contra Costa County | — | — |
| Taber Construction INC | Valeria Ruth Cunningham | — | (925) 387 0614 | GC, remodel, ADU | Martinez · Contra Costa County | — | — |
| Tabernus Service Company | Ryan Joseph Albertson | — | (925) 759 8845 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Tahalamo Design & Build INC General Contractors | Kent Rudolph Sciutto | — | (415) 640 2304 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Tahmina Aral Saberi | Tahmina Aral Saberi | — | (925) 667 5245 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| Tahoe Pool Service | Paul Anthony Davi | — | (925) 513 8080 | Pool | Brentwood · Contra Costa County | — | — |
| Tai Mai | Tai Mai | — | (925) 683 8794 | Windows, patio, painters | San Ramon · Contra Costa County | — | — |
| Taizan Builder | Taizan Builder | — | (510) 418 5393 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Talior Construction INC | Assi | taliorconstruction@gmail.com | (510) 421 0444 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Tamayo Construction Company | Tamayo Guadalupe | — | (510) 367 3554 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Tan's Construction LLC | Ming Xian Tan | — | (510) 282 8808 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Tankless Water Heater Experts | Martin Mihaylov Arnaudov | — | (925) 255 6352 | HVAC | San Ramon · Contra Costa County | — | — |
| Tap Master INC | Stanley Wayne Mc Callister | — | (925) 439 7975 | Other | Concord · Contra Costa County | — | — |
| Taragano Design And Build | Yaniv Elazar Taragano | — | (323) 545 7256 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Task Sullivan INC | James Arthur Zierolf | — | (925) 825 5625 | Other | Martinez · Contra Costa County | — | — |
| Tate General Contracting | Andrew Russell Tate | — | (925) 216 5505 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Tay & Jay Designs INC | Joseph David York | anapbm@gmail.com | (925) 260 5936 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Taylor Made Flooring INC | Kelly Lynn Taylor | — | (925) 727 7383 | Other | Brentwood · Contra Costa County | — | — |
| Taylor Restaurant Systems INC | Bruce Gordon Taylor | — | (510) 409 1107 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Tcpaf INC | Adam Barry Freeland | — | (415) 612 0588 | Other | Walnut Creek · Contra Costa County | — | — |
| Tdi Construction INC | Gregory Alan Trautwein | — | (925) 263 6077 | GC, remodel, ADU | Brentwood · Contra Costa County | — | — |
| Team No Leaks Plumbing INC | Jelani Kardell Moore | review_ribbon_medium_20_5@1x-1.svg | (510) 435 2799 | Other | El Sobrante · Contra Costa County | — | — |
| Teames Construction | Teames Jonathan | info@teamesconstruction.com | (925) 595 0951 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Technical Flooring Professionals INC | Ronald Bruce Nemeth | — | (510) 940 8145 | Other | Danville · Contra Costa County | — | — |
| Technique Pavers | Technique Pavers | hello@rfuenzalida.com | (925) 727 8130 | Windows, patio, painters | Oakley · Contra Costa County | — | — |
