| Streamline Plumbing Services INC | Noel Chavez Chavez | — | (530) 668 0352 | Other | Woodland · Yolo County | — | — |
| Stuart Brocksen Landscapes | Stuart Brocksen Landscapes | — | (916) 591 9831 | Windows, patio, painters | Davis · Yolo County | — | — |
| Substation Solutions LLC | Bradley Wayne Webb | — | (530) 908 0772 | Electricians | Woodland · Yolo County | — | — |
| Sunbear Electric | Alejandro Vazquez Calderon | — | (916) 798 2539 | Electricians | Woodland · Yolo County | — | — |
| Supply Finishes | Tommy Lewis Carpenter | — | (844) 484 7267 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Supreme Floors INC | Khripunov Aleksey | — | (916) 272 9954 | Other | West Sacramento · Yolo County | — | — |
| Supremo Heating & Air | Supremo Heating & Air | — | (530) 650 9969 | HVAC | Dunnigan · Yolo County | — | — |
| Sureline Garage Doors | Joseph Vasily Beregovoy | — | (916) 365 2603 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Sw Mertz Masonry Specialists INC | Kacey Brett Mertz | — | (530) 795 9007 | GC, remodel, ADU | Winters · Yolo County | — | — |
| Synlawn | George Henry Neagle | — | (253) 236 4918 | Other | West Sacramento · Yolo County | — | — |
| T & K Roofing | Thomas Daniel Hilsky | — | (707) 249 5971 | Other roofers | Winters · Yolo County | — | — |
| T And S Paving | T And S Paving | — | (916) 869 6059 | Other | West Sacramento · Yolo County | — | — |
| T C S Turf | T C S Turf | — | (916) 500 1383 | Windows, patio, painters | West Sacramento · Yolo County | — | — |
| T Joseph Shea Construction | Timothy Joseph Shea | — | (707) 451 7248 | GC, remodel, ADU | Winters · Yolo County | — | — |
| Taber Drilling | Brian James Young | aayala@taberdrilling.com | (916) 206-5928 | Other | West Sacramento · Yolo County | — | — |
| Taber LLC | Andrew Lucas Taber | — | (916) 717 9901 | Other | West Sacramento · Yolo County | — | — |
| Tatum Construction | Lewis Lee Tatum | info@tatumconstruction.com | (530) 601 7930 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Team Kalanetra Flooring | Team Kalanetra Flooring | — | (707) 580 1884 | Other | Davis · Yolo County | — | — |
| Tekton INC | Michele Denise Reiff | — | (530) 715 1715 | GC, remodel, ADU | Yolo · Yolo County | — | — |
| Tello's Construction | Tello Ricardo | — | (530) 405 7310 | GC, remodel, ADU | Knights Landing · Yolo County | — | — |
| Temperatures Unlimited | Temperatures Unlimited | — | (707) 761 7403 | HVAC | Knights Landing · Yolo County | — | — |
| Tepson Roofing | Jose Jesus Carlos Sanchez | — | (916) 822 1141 | Other roofers | West Sacramento · Yolo County | — | — |
| Terracore INC | Brittany Noel Bair | — | (916) 860 4613 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Terry L Smaystrla General Contractor | Terry L Smaystrla General Contractor | — | (530) 219 4601 | GC, remodel, ADU | Winters · Yolo County | — | — |
| Tetreault Construction | Chris Paul Tetreault | — | (530) 867 0224 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Texel Painting | Texel Painting | texelpainting@gmail.com | (530) 304 7395 | Windows, patio, painters | Woodland · Yolo County | — | — |
| The Cook Company | James Edward Cook | — | (530) 304 2826 | Windows, patio, painters | Davis · Yolo County | — | — |
| The Current Solution | The Current Solution | — | (530) 758 9476 | Electricians | Davis · Yolo County | — | — |
| The Garage Door Man | The Garage Door Man | — | (916) 439 5645 | Other | West Sacramento · Yolo County | — | — |
| The Good Home Co | Eric Thaddeus Martinus | — | (530) 746 7848 | GC, remodel, ADU | Davis · Yolo County | — | — |
| The Home Improvements Group INC | Lacey Theresa Passantino | — | (530) 666 5061 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| The Lukins Corporation | Rory Gregory Lukins | — | (916) 371 1062 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| The Neighborhood Engineers LLC | Donaciano Christopher Sandoval | — | (916) 477 9027 | HVAC | West Sacramento · Yolo County | — | — |
| The Toilet Whisperer | The Toilet Whisperer | — | (916) 226 0499 | Other | Davis · Yolo County | — | — |
| Thomas Construction | Sean Mathew Thomas | — | (530) 668 4349 | GC, remodel, ADU | Woodland · Yolo County | — | — |
| Thomas M Pearson Hardwood | Thomas M Pearson Hardwood | — | (530) 545 1110 | Other | Davis · Yolo County | — | — |
| Thompson's Heating & Air INC | Rachel Ann Wilkerson | — | (530) 661 2599 | HVAC | Woodland · Yolo County | — | — |
| Three Nails Home Improvement | Eric John Keller | — | (916) 674 2639 | GC, remodel, ADU | West Sacramento · Yolo County | — | — |
| Tile Stone | Vasyl Vasylovych Kutsyn | — | (503) 914 9081 | Other | West Sacramento · Yolo County | — | — |
| Tim Sullivan Concrete Construction INC | Timothy Charles Sullivan | — | (530) 308 5451 | Other | Esparto · Yolo County | — | — |