| Savage Companies INC | Blaine Anthony Savage-romano | careers@savageco.com | (530) 739 5407 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Sf Bay Concrete Repair | Sf Bay Concrete Repair | — | (415) 515 1000 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| Shane Brookins Earthmoving | Shane Brookins Earthmoving | — | (530) 515 4308 | Other | Lewiston · Trinity County | — | — |
| Silver Top Tree Service INC | Joshua Alan Silver | — | (530) 423 5232 | Tree | Weaverville · Trinity County | — | — |
| Silverline Tree Service LLC | Matthew John Mildbrandt | — | (707) 834 6909 | Tree | Trinity Center · Trinity County | — | — |
| Skyline General Engineering | Ossie Joseph Iii Balbini | — | (707) 502 6682 | Other | Hayfork · Trinity County | — | — |
| Solid Electrical Services | Solid Electrical Services | — | (619) 493-1161 | Electricians | Santee · Trinity County | — | — |
| Special Construction | Delwin Charles Edge | — | (530) 351 2896 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Steele Home Maintenance & Repair | Steele Home Maintenance & Repair | — | (530) 410 3771 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Steve Metcalf Electric | Steven Dennis Metcalf | — | (530) 351 4384 | Electricians | Weaverville · Trinity County | — | — |
| Storckman Plumbing INC | Robert William Storckman | — | (530) 623 4400 | Other | Weaverville · Trinity County | — | — |
| Sweetwater Construction | Joshua James Schertzer | — | (707) 497 4771 | GC, remodel, ADU | Salyer · Trinity County | — | — |
| T&l High Alps Construction INC | Travis Lee Christensen | — | (530) 778 3889 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| Taylor Construction | Joseph Jeffrey Taylor | — | (530) 623 2283 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| The Electrician Incorporated | Pavel Nalezek | — | (530) 277 5345 | Electricians | Salyer · Trinity County | — | — |
| Thurston Wilson Construction | Thurston Bryce Wilson | — | (530) 604 1051 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Tim Kelley Construction | Timothy Joseph Kelley | — | (208) 995 5397 | GC, remodel, ADU | Junction City · Trinity County | — | — |
| Tralle Construction | Miles Abraham Tralle | — | (530) 569 0104 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Travis Cody | Travis Cody | — | (530) 605 7404 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Treanor Construction | Troy Jonathan Treanor | — | (530) 410 1994 | GC, remodel, ADU | Hayfork · Trinity County | — | — |
| Trindade Electric | Joseph Scott Trindade | — | (530) 739 8231 | Electricians | Hayfork · Trinity County | — | — |
| Trinity Artisan Steel | Kenneth Edward Godfrey | holly@trinityartisansteel.com | (530) 739 9399 | Other | Douglas City · Trinity County | — | — |
| Trinity Electric Co. | Trinity Electric Co. | — | (855) 343-8799 | Electricians | Temecula · Trinity County | — | — |
| Trinity Handyman And Construction Services | Dylan Oliver Sansen | trinityhandymanservicesca@gmail.com | (530) 739 1175 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| Trinity Heating & Air Conditioning Corp | Lanny Eugene Roan | — | (530) 623 4046 | HVAC | Weaverville · Trinity County | — | — |
| Trinity Heating And Air | Trinity Heating And Air | trinityheatingandairca@gmail.com | (279) 667-4304 | HVAC | Roseville · Trinity County | — | — |
| Trinity Plumbing Company | Connor Eugene Roberson | interested@domainmarket.com | (530) 739 8369 | Other | Weaverville · Trinity County | — | — |
| Trinity Pools Cslb#1064309 | Trinity Pools Cslb#1064309 | — | (619) 249-0322 | Pool | El Cajon · Trinity County | — | — |
| Trinity Pump & Supply | Trinity Pump & Supply | — | (530) 739 3216 | Other | Douglas City · Trinity County | — | — |
| Trinity Woodworks | Trinity Woodworks | — | (530) 778 3292 | Other | Lewiston · Trinity County | — | — |
| Velocity Communications INC | Travis Gordon Finch | interested@domainmarket.com | (530) 623 3550 | Other | Weaverville · Trinity County | — | — |
| Vision Builder | Vision Builder | info@visionbuilder.com | (541) 272 1587 | GC, remodel, ADU | Burnt Ranch · Trinity County | — | — |
| Warrington Construction | Thomas Lee Warrington | — | (707) 738 6050 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Watkins Tree Service INC | Todd Wyatt Watkins | — | (530) 623 7788 | Tree | Weaverville · Trinity County | — | — |
| Wes Christensen Drywall Repair | Wes Christensen Drywall Repair | — | (530) 778 3522 | Other | Lewiston · Trinity County | — | — |
| White Construction | Gregory Francis White | — | (530) 778 0323 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| William Blake Gray | William Blake Gray | — | (626) 384 0611 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| Willow Hawk INC | James Paul Ammon | — | (530) 739 3828 | GC, remodel, ADU | Salyer · Trinity County | — | — |
| Yurok Tribe Construction Corporation | Steven Joseph Reinoehl | — | (707) 572 5251 | Other | Weaverville · Trinity County | — | — |
| Zion Construction | Zion Matthew Carlson | — | (707) 834 2474 | GC, remodel, ADU | Salyer · Trinity County | — | — |