| Tim Walsh Builders INC | Timothy Edward Walsh | — | (415) 381 9806 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Timberline Builders INC Which Will Do Business As Timberline | Eric John Hughes | — | (415) 883 5900 | GC, remodel, ADU | Novato · Marin County | — | — |
| Timberline Tree Care | Rivera Daniel Ramirez | info@timberlinetreecaremarin.com | (415) 235 2938 | Other | San Rafael · Marin County | — | — |
| Timmins Construction | Patrick Joseph Iv Timmins | info@timminsconstruction.com | (760) 497 2834 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Timothy C Leary | Timothy C Leary | — | (415) 378 3557 | Windows, patio, painters | Woodacre · Marin County | — | — |
| Timothy Cogliandro DBA Cogliandro Construction | Timothy Peter Cogliandro | — | (415) 883 1106 | GC, remodel, ADU | Novato · Marin County | — | — |
| Timothy James Peterson | Timothy James Peterson | — | (415) 889 5944 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| Timothy John Rice DBA Rice Construction | Timothy John Rice | — | (415) 892 4884 | GC, remodel, ADU | Novato · Marin County | — | — |
| Timothy S Vinson DBA Building Alchemy | Building Alchemy | — | (415) 272 8756 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Timothy Toquinto Design & Builder | Timothy Toquinto Design & Builder | — | (415) 246 0961 | GC, remodel, ADU | Novato · Marin County | — | — |
| Toc Painting | Thomas Robert O'callaghan | — | (415) 902 6286 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Todd Morris Fire Protection INC | Todd Christopher Morris | todd@toddmorrisfireprotection.com | (415) 454 7919 | Other | San Rafael · Marin County | — | — |
| Tom Boes Metalworks | Tom Boes Metalworks | tbmetalworks@sbcglobal.net | (415) 295 7625 | Other | Novato · Marin County | — | — |
| Tom Minka | Tom Minka | — | (415) 725 7144 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Tom Redmond Construction INC | Donna Jane Redmond | tom@tomredmondconstruction.com | (415) 892 9918 | GC, remodel, ADU | Novato · Marin County | — | — |
| Tomales Bay Landscaping INC | Ramirez Gutierrez Carlos | — | (415) 990 7863 | Windows, patio, painters | Point Reyes Station · Marin County | — | — |
| Tomas Cano | Tomas Cano | tom@tomascano.com | (628) 245 6617 | Electricians | Mill Valley · Marin County | — | — |
| Tomas Castaneda Construction INC | Richard Castaneda | — | (415) 945 9306 | GC, remodel, ADU | Novato · Marin County | — | — |
| Tomasi Cabinet Makers INC | Tomasi Christopher | — | (415) 342 8342 | Other | San Rafael · Marin County | — | — |
| Toro Landscaping | Toro Landscaping | interested@domainmarket.com | (415) 407 4232 | Windows, patio, painters | Novato · Marin County | — | — |
| Torres Electrical Design | Cristian Ignacio Torres-perez | — | (415) 306 4806 | Electricians | San Rafael · Marin County | — | — |
| Tos Builders LLC | Stephen Donald Steele | — | (415) 883 8900 | GC, remodel, ADU | Belvedere Tiburon · Marin County | — | — |
| Towerside Construction INC | Michael Thomas Wallace | — | (415) 240 6915 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Towery Electric INC | Alexander Braxton Towery | office@toweryelectric.com | (415) 419 5960 | Electricians | Novato · Marin County | — | — |
| Towey Construction INC | John Martin Towey | — | (415) 731 2869 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Tradesman Painting & Decorating | Tradesman Painting & Decorating | — | (415) 504 4968 | Windows, patio, painters | Novato · Marin County | — | — |
| Traditional Trades | Traditional Trades | — | (415) 328 2814 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Trahan Mechanical INC DBA Trahan Brothers | Timothy Neil Trahan | — | (415) 457 5541 | HVAC | San Rafael · Marin County | — | — |
| Trans Energy | Trans Energy | nyamaguchi@trans-energy.com | (415) 663 1544 | HVAC | Olema · Marin County | — | — |
| Transbay Lock INC | Jason Robert Farley | — | (415) 456 3860 | Other | San Rafael · Marin County | — | — |
| Transformation Painting | Transformation Painting | — | (415) 246 3686 | Windows, patio, painters | Novato · Marin County | — | — |
| Travis Builders INC DBA Travis Remodeling | Guy Walter Travis | — | (415) 883 8177 | GC, remodel, ADU | Novato · Marin County | — | — |
| Travis M Kelleher | Travis M Kelleher | — | (415) 717 7625 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Tree House Construction INC | Charles Nathan Marsh | — | (510) 965 5875 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Tree Pros | Jon Edward Black | treeprosrep@treepros.com | (415) 388 6060 | Tree | Mill Valley · Marin County | — | — |
| Treemasters Tree And Garden Care | Thaddeus Ernesto Jacobs | — | (415) 455 9933 | Tree | San Rafael · Marin County | — | — |
| Treharne - Jones | Treharne - Jones | — | (415) 205 0452 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Tri Counties Painting & Decorating | Tri Counties Painting & Decorating | — | (707) 338 5148 | Windows, patio, painters | Sausalito · Marin County | — | — |
| Triangle Builder | Triangle Builder | — | (510) 734 0015 | GC, remodel, ADU | Novato · Marin County | — | — |
| Tricolor Painting LLC | Ligne Stephan | stephan@tricolorpainting.com | (415) 246 0776 | Windows, patio, painters | San Geronimo · Marin County | — | — |