| T N T Signs & Graphics INC | Timothy Joseph Armstrong | — | (707) 528 8523 | Other | Healdsburg · Sonoma County | — | — |
| T N T Tile & Stone | Tyree Lashawn Porter | — | (707) 790 7533 | Other | Santa Rosa · Sonoma County | — | — |
| T Q Builders | T Q Builders | — | (707) 495 0670 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Taf Building & Design INC | Timothy Aaron Foote | — | (707) 545 1675 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Tall Pine Contracting INC | Anthony Philip Guerra | info@ndiscovered.com | (916) 223 1028 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| Tallest Tree Construction | Matthew Phillip Wellen | — | (707) 695 3545 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Tamagno Green Products | Tamagno Green Products | — | (707) 364 5596 | Tree | Penngrove · Sonoma County | — | — |
| Tamalpais Plumbing | Tamalpais Plumbing | — | (415) 457 7660 | Other | Sebastopol · Sonoma County | — | — |
| Tamayo Plastering INC | George Tamayo | — | (707) 486 1007 | Other | Cloverdale · Sonoma County | — | — |
| Taniguchi Construction | Darren Hiro Taniguchi | info@taniguchi-construction.com | (707) 799 9458 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Tanoak Construction LLC | David James Bowman | dbowman.tanoak@gmail.com | (707) 888 2453 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Tap Excavation INC DBA Tap Construction | Tyler Antone Pignaz | — | (707) 595 7789 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Tara Custom Painting & Decorating | Tara Custom Painting & Decorating | — | (707) 494 5775 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Tarantino's Yardscapes | Tarantino's Yardscapes | — | (707) 484 9798 | Windows, patio, painters | Windsor · Sonoma County | — | — |
| Tarrant Builders | Tarrant Builders | — | (707) 236 0503 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| Taurian Construction | Mario James Taurian | mario@taurianconstruction.com | (707) 494 1154 | Other | Fulton · Sonoma County | — | — |
| Taurus Painting And Decorating INC | Andres Omar Orozco | — | (707) 481 5095 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Tauzer Construction | William Harry Tauzer | — | (707) 480 3736 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Tavares Construction | Harrison Slade Tavares | tavaresconstruction24@gmail.com | (707) 849 5534 | HVAC | Santa Rosa · Sonoma County | — | — |
| Taylor Construction | Barrett William Taylor | — | (415) 424 3997 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Taylor Energy Systems INC | Sean Bradford Taylor | — | (707) 494 6053 | Electricians | Sebastopol · Sonoma County | — | — |
| Teahan Construction Company | Matthew Kerry Teahan | — | (650) 759 3539 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Team Ghilotti INC | Robert Eric Lee | — | (707) 763 8700 | Other | Petaluma · Sonoma County | — | — |
| Tech Savvy INC | Vincent William Iv Bagala | — | (707) 318 4557 | Other | Santa Rosa · Sonoma County | — | — |
| Teddy Herzog Construction | Teddy Michael Herzog | — | (707) 481 4057 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Tee Vax | Edward Richard Montague | — | (707) 545 1195 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Tellechea Landscape | Tellechea Landscape | — | (707) 479 8337 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Telluric Landscapes LLC | Tracy Ann Havis Sanbrailo | design@telluriclandscapes.com | (415) 250 3337 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Temperature Solutions INC | Victor Ricardo Garcia Nava | — | (707) 326 0424 | HVAC | Santa Rosa · Sonoma County | — | — |
| Temple Pool Service | Nicholas James Temple | — | (707) 319 4990 | Pool | Petaluma · Sonoma County | — | — |
| Teo B Hix | Teo B Hix | — | (707) 921 6484 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Terra Firma Builders | Terra Firma Builders | — | (415) 488 7038 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Terracon Constructors INC | Steven James Lydon | — | (707) 433 0323 | GC, remodel, ADU | Geyserville · Sonoma County | — | — |
| Terracon Equip INC | Steven James Lydon | — | (707) 433 0323 | GC, remodel, ADU | Geyserville · Sonoma County | — | — |
| Terrascape Creations | Terrascape Creations | guillermo@terrascapecreations.com | (707) 495 6945 | Windows, patio, painters | Penngrove · Sonoma County | — | — |
| Terrascape Landscape INC | Michael Steven Kalbfleisch | — | (707) 974 3392 | Windows, patio, painters | Geyserville · Sonoma County | — | — |
| Terry Boyer Property | Terry Boyer Property | — | (707) 508 7187 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Terry Duffy | Terry Duffy | — | (650) 642 5041 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Terry Tuxhorn Master Builders | Terry Tuxhorn Master Builders | — | (707) 483 6082 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Tesla Electric | Celovsky Samuel | — | (707) 328 6609 | Electricians | Santa Rosa · Sonoma County | — | — |