| A J Rankin Construction | Albert James Rankin | — | (925) 206 8303 | GC, remodel, ADU | Trinity Center · Trinity County | — | — |
| Accent Painting | Gerald Nathan Lurtsema | — | (530) 510 5811 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| All Area Landscaping | All Area Landscaping | — | (530) 435 5959 | Windows, patio, painters | Weaverville · Trinity County | — | — |
| Alpine Builders | Alpine Builders | — | (530) 623 3107 | GC, remodel, ADU | Douglas City · Trinity County | — | — |
| B & W Bobcat Services | Brian Eugene Young | — | (530) 227 3924 | Other | Hayfork · Trinity County | — | — |
| B Sharp Electrical Contractor INC | William Palmer Sharp | — | (530) 623 3230 | Electricians | Weaverville · Trinity County | — | — |
| Ben Boak Construction | Benjamin David Boak | — | (707) 845 8305 | GC, remodel, ADU | Mad River · Trinity County | — | — |
| Bgreen Construction | Daniel Floyd Klein | — | (530) 782 1946 | GC, remodel, ADU | Mad River · Trinity County | — | — |
| Bigfoot Hauling & Demolition | Bigfoot Hauling & Demolition | — | (530) 739 3454 | Other | Douglas City · Trinity County | — | — |
| Bill Cargill Electric | William Steven Cargill | — | (530) 598 4625 | Electricians | Weaverville · Trinity County | — | — |
| Boorman Construction | Henry Richard Hart Boorman | — | (530) 351 1192 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Brian Barrow Construction | Brian Gene Barrow | — | (530) 623 4468 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| C & Z Timber Company INC | Zachary James Peltier | — | (707) 498 3906 | Other | Big Bar · Trinity County | — | — |
| Care Plumbing | Peter Joe Brandauer | — | (707) 499 7914 | GC, remodel, ADU | Mad River · Trinity County | — | — |
| Clayton Cameron Construction | Clayton James Cameron | — | (503) 508 0804 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Clint Graham Construction | Clinton Abel Graham | — | (530) 739 3727 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Company Construction | Godbe Collin | — | (530) 623 7770 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Control Temp Refrigeration | Control Temp Refrigeration | — | (530) 710 4169 | HVAC | Douglas City · Trinity County | — | — |
| Cornerstone Construction | David Martin Lee | gwebb@cornerstone-construction.com | (832) 259-2520 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Craig Hair Construction | Craig John Jr Hair | — | (570) 227 5449 | Other | Hayfork · Trinity County | — | — |
| Cross Country INC | Christopher Thomas Cross | — | (530) 623 6450 | Other | Douglas City · Trinity County | — | — |
| Crystal Air | Crystal Air | info@crystal-air.com | (530) 623 1000 | HVAC | Weaverville · Trinity County | — | — |
| Dan Mcintosh Tree Care | Dan Mcintosh Tree Care | — | (530) 351 5510 | Tree | Douglas City · Trinity County | — | — |
| Dave Ottem Construction | David Eugene Ottem | — | (530) 515 5043 | Electricians | Weaverville · Trinity County | — | — |
| E B Huff Excavating LLC | Ossie Joseph Iii Balbini | — | (530) 227 1154 | Other | Hayfork · Trinity County | — | — |
| Eagle Rock Incorporated | Sherrie Lea Zappola | — | (530) 623 4444 | Other | Weaverville · Trinity County | — | — |
| Ebm Engineering Construction INC | Erik Brandon Mendes | — | (707) 845 5288 | Other | Mad River · Trinity County | — | — |
| Edge Construction | Darwin Dean Edge | info@edge-construction.com | (530) 623 3598 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Fiermonte Electric | Jacob Anthony Fiermonte | — | (530) 356 5378 | Electricians | Weaverville · Trinity County | — | — |
| Freer's Building Maintenance And Construction | Roger Robert Freer | — | (916) 812 4159 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Graham Electric | Jacob Richard Graham | jacobgrahamelectric@gmail.com | (530) 784 3124 | Electricians | Weaverville · Trinity County | — | — |
| H R C Partners | Marsha Ann Councilman | — | (530) 629 2777 | GC, remodel, ADU | Salyer · Trinity County | — | — |
| Handy Matt | Handy Matt | — | (408) 709 6850 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Hilburn Construction INC | Waylon Lucas Hilburn | — | (530) 921 3391 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| Hinkle & Hinkle Roofing INC | Cameron Alexander Hinkle | — | (560) 784 3473 | Other roofers | Lewiston · Trinity County | — | — |
| Hodges Construction | John Douglas Hodges | — | (530) 623 7158 | GC, remodel, ADU | Weaverville · Trinity County | — | — |
| J Elliot Company | Joseph Michael Elliott | — | (209) 256 5353 | Other | Weaverville · Trinity County | — | — |
| Jacob Schott Concrete | Jacob Schott Concrete | — | (530) 739 2858 | GC, remodel, ADU | Lewiston · Trinity County | — | — |
| Jon K Aronson Construction | Jon Kirk Aronson | — | (707) 499 4576 | GC, remodel, ADU | Mad River · Trinity County | — | — |
| Jones Electric | Troy Brennen Jones | — | (530) 739 9813 | Electricians | Weaverville · Trinity County | — | — |