| Super Dave's Construction | David Francis Mullins | — | (530) 355 9111 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Superior Drywall | Superior Drywall | — | (530) 262 1905 | Other | Redding · Shasta County | — | — |
| Sure Step Flooring | Sure Step Flooring | — | (530) 227 3376 | Other | Redding · Shasta County | — | — |
| Swanson Inspections | Swanson Inspections | — | (951) 271-0578 | Inspectors | Norco · Shasta County | — | — |
| Swansons Contracting | Sean David Swanson | — | (530) 646 8192 | GC, remodel, ADU | Palo Cedro · Shasta County | — | — |
| Swetland Construction | James Allen Swetland | — | (530) 524 9808 | GC, remodel, ADU | Cottonwood · Shasta County | — | — |
| Synergo LLC | Erik Burton Marter | info@synergo.com | (503) 746 6646 | Other | Redding · Shasta County | — | — |
| T - Cain Construction | Tyler Dean Cain | — | (530) 945 7139 | GC, remodel, ADU | Oak Run · Shasta County | — | — |
| T A Briggs | Terry Allan Briggs | — | (530) 336 5488 | Other | Fall River Mills · Shasta County | — | — |
| T And S Dvbe INC | Steven Ray Forde | — | (530) 639 9987 | Other | Anderson · Shasta County | — | — |
| T C M Construction | Simonis Todd | — | (530) 396 2444 | GC, remodel, ADU | Igo · Shasta County | — | — |
| T C Tile | T C Tile | — | (530) 691 9844 | Other | Redding · Shasta County | — | — |
| T G Construction | Trevor Paul Gerhardt | — | (530) 215 7802 | GC, remodel, ADU | Oak Run · Shasta County | — | — |
| T N T Grading & Excavating | Nathan John Trisdale | — | (530) 396 2200 | Other | Igo · Shasta County | — | — |
| T R G Equipment Services | Thomas Riley Gregory | — | (530) 347 5866 | Other | Cottonwood · Shasta County | — | — |
| T R G Excavation INC | Thomas Riley Gregory | — | (530) 941 8450 | Other | Cottonwood · Shasta County | — | — |
| T-com | Keith Daniel Jr Thompson | — | (530) 209 7019 | Other | Anderson · Shasta County | — | — |
| Tagatz Painting Co. | Tagatz Painting Co. | — | (530) 208-5305 | Windows, patio, painters | Mt Shasta · Shasta County | — | — |
| Talbot Painting INC | Timothy Ray Talbot | — | (530) 515 1078 | Windows, patio, painters | Redding · Shasta County | — | — |
| Tapia Landscaping | Tapia Landscaping | — | (530) 276 7488 | Windows, patio, painters | Anderson · Shasta County | — | — |
| Target | Target | — | (760) 633-1406 | Pest, tile roofs | Encinitas · Shasta County | — | — |
| Taylor & Royal Corp | Garrett Alan Taylor | — | (530) 629 5200 | Other | Redding · Shasta County | — | — |
| Taylor Made Construction | Kenneth William Taylor | — | (530) 360 4546 | GC, remodel, ADU | Shingletown · Shasta County | — | — |
| Taylor Made Homes LLC | Jarrod Thomas Pugliese | — | (530) 318 0297 | GC, remodel, ADU | Shingletown · Shasta County | — | — |
| Ted Nelson Construction Co | Theodore John Nelson | — | (530) 276 3543 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Telos General Engineering | Telos General Engineering | — | (530) 351 3375 | Other | Anderson · Shasta County | — | — |
| Terra Firma Utility | Terra Firma Utility | — | (707) 500 4040 | Other | Redding · Shasta County | — | — |
| Terrace Builders | Terrace Builders | — | (530) 227 7903 | GC, remodel, ADU | Millville · Shasta County | — | — |
| Terraworks LLC | Amanda Nicole Boucher | — | (630) 276 8719 | GC, remodel, ADU | Palo Cedro · Shasta County | — | — |
| Thanh Pham Construction | Thanh Van Pham | — | (530) 768 7707 | GC, remodel, ADU | Redding · Shasta County | — | — |
| The Covered Wagon Construction Company | Wesley Craig Brown | — | (530) 646 5773 | GC, remodel, ADU | Redding · Shasta County | — | — |
| The Finishing Touch | The Finishing Touch | — | (530) 209 7469 | Other | Shasta Lake · Shasta County | — | — |
| The Fire Place Chimney Service | Ashley Kate Pietrocci | — | (530) 999 5444 | Other | Redding · Shasta County | — | — |
| The Glass Store INC | Peter Virgil Scatena | — | (530) 222 7216 | Windows, patio, painters | Redding · Shasta County | — | — |
| The Green Earth Company | Jordan Raymond Miller | — | (530) 604 8562 | Windows, patio, painters | Redding · Shasta County | — | — |
| The Tile Guy | The Tile Guy | paul@tile-guy.com | (530) 515 7333 | Other | Redding · Shasta County | — | — |
| The Water Well Store INC DBA Watson Well Service Water Treament & | Trent Harrison Watson | — | (530) 786 0966 | Other | Anderson · Shasta County | — | — |
| Thomas Clegg Construction | Thomas Harry Clegg | — | (530) 515 3690 | GC, remodel, ADU | Redding · Shasta County | — | — |
| Thomas Edward Brighthaupt | Thomas Edward Brighthaupt | — | (530) 472 1028 | GC, remodel, ADU | Bella Vista · Shasta County | — | — |
| Thomas Enterprises | Leroy Wayne Thomas | — | (530) 921 0471 | Electricians | Anderson · Shasta County | — | — |