| Toolbox House Care INC | Mark Robert Hall | mark@toolboxhousecare.com | (707) 861 1084 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Top Line Painting | Top Line Painting | — | (707) 321 0796 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Top Of The Bay Landscaping | Top Of The Bay Landscaping | — | (707) 494 2604 | GC, remodel, ADU | Vineburg · Sonoma County | — | — |
| Top Shelf Builders | Toribio De Jesus Jimenez Orozco | — | (707) 486 8308 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Top Shelf Painting | Top Shelf Painting | — | (415) 424 3689 | Windows, patio, painters | Cotati · Sonoma County | — | — |
| Topcoat Painting Company LLC | Rico Andres Martinez | — | (707) 539 4148 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Topete Drywall | Jose Juan Topete Tapia | — | (707) 318 4661 | Other | Santa Rosa · Sonoma County | — | — |
| Topete Drywall | Jose Juan Topete Tapia | — | (707) 899 6894 | Other | Santa Rosa · Sonoma County | — | — |
| Topo Construction INC | Ralph Vincent Topo | — | (707) 477 3771 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Torrano Construction | Michele Renato Torrano | — | (707) 583 5657 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Torres Landscaping | Torres Landscaping | — | (707) 490 8513 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Total Concepts | John Jacob Rechin | — | (707) 591 0760 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Total Electric | Peter David Tapia | — | (415) 722 8876 | Electricians | Penngrove · Sonoma County | — | — |
| Totem Landscape Services INC | Thomas Martin Bottari | thomas@totemlandscapeservices.com | (707) 637 6051 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Toucan Construction Specialists | Michael Stephen Pruitt | — | (707) 322 5796 | GC, remodel, ADU | Cloverdale · Sonoma County | — | — |
| Town & Country Fencing | Town & Country Fencing | — | (707) 481 1865 | Other | Santa Rosa · Sonoma County | — | — |
| Town And Country Construction | Marc Mitchell Ripley | — | (707) 823 1121 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Town And Country Construction | Richard Earl Carnation | — | (707) 837 7394 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Town And Country Tile | Town And Country Tile | — | (707) 849 9984 | Other | Santa Rosa · Sonoma County | — | — |
| Toyon Company | James Louis Glendening | — | (707) 887 1271 | GC, remodel, ADU | Forestville · Sonoma County | — | — |
| Tradesmen | Craig Anthony Valvero | — | (707) 753 1585 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Traditional Builders | Stephen Clark Traweek | interested@domainmarket.com | (707) 953 3147 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Trainor Commercial Construction INC | William James Shockey | — | (415) 259 0200 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Trammell Nelson Wood Flooring | Trammell Nelson Wood Flooring | — | (415) 254 2231 | Other | Santa Rosa · Sonoma County | — | — |
| Trans Tech Consultants | William Clyde Wiggins | — | (707) 837 8408 | Other | Windsor · Sonoma County | — | — |
| Travinsky Construction | Keith George Travinsky | — | (707) 427 4233 | GC, remodel, ADU | Bodega Bay · Sonoma County | — | — |
| Travis Carter Construction Services | Travis Edward Carter | — | (707) 331 9177 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Travis Diebold | Travis Diebold | — | (707) 495 6063 | Other | Healdsburg · Sonoma County | — | — |
| Travis Garrett Tree Service | Travis Ian Garrett | — | (707) 246 6435 | Tree | Glen Ellen · Sonoma County | — | — |
| Tree And Landscape Care Corporation | Isaac Israel Triscell | — | (707) 318 9913 | Windows, patio, painters | Penngrove · Sonoma County | — | — |
| Tree Service Father And Daughter | Tree Service Father And Daughter | — | (707) 210-5022 | Tree | Sonoma · Sonoma County | — | — |
| Treecs INC | Elvis Unay Fuentes Guerrero | — | (707) 775 0293 | Other | Santa Rosa · Sonoma County | — | — |
| Treels INC | Martinez Francisco Landeros | — | (707) 774 1166 | Other | Santa Rosa · Sonoma County | — | — |
| Treepro Professional Tree Care | Treepro Professional Tree Care | info@imagetreepros.com | (707) 394-9078 | Tree | Rohnert Park · Sonoma County | — | — |
| Trejo Fencing | Trejo Fencing | — | (707) 710 1531 | Other | Santa Rosa · Sonoma County | — | — |
| Trent Taylor Construction | Trenton Nathaniel Taylor | — | (415) 747 7878 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Trevor Schmid | Trevor Schmid | — | (209) 905 6400 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Tri - County Garage Door INC | Mike Angelo Jachetta | — | (707) 836 8442 | Other | Windsor · Sonoma County | — | — |
| Tri County Contractor Complete Drywall Services | Jose Alfredo Gutierrez | — | (707) 570 9004 | Other | Santa Rosa · Sonoma County | — | — |
| Tri County Design Center | Brian John Miller | — | (707) 762 5514 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |