| Sharp's Locksmithing & Garage Doors INC | Tyler William Sharp | — | (530) 533 5713 | GC, remodel, ADU | Oroville · Butte County | — | — |
| Shaun Fleming | Shaun Fleming | — | (209) 652 9335 | GC, remodel, ADU | Chico · Butte County | — | — |
| Shawn A Shingler | Shawn A Shingler | — | (530) 877 1180 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Shawn Patrick Suyama | Shawn Patrick Suyama | — | (310) 357 1493 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Shawn Waggoner Construction | Shawn Fitz-allen Waggoner | shawnwaggoner82@gmail.com | (530) 864 7271 | GC, remodel, ADU | Chico · Butte County | — | — |
| She Builds | Stefanie Marie Olson | — | (530) 521 9551 | GC, remodel, ADU | Durham · Butte County | — | — |
| Sheraton Services INC | Lawrence Leland Ruby | — | (530) 624 8361 | GC, remodel, ADU | Chico · Butte County | — | — |
| Sherwood Residential Construction INC | Jacob Ian Long | — | (530) 588 3817 | GC, remodel, ADU | Yankee Hill · Butte County | — | — |
| Shields Electric | Michael Allan Shields | info@shieldselectric.com | (530) 534 8342 | Electricians | Oroville · Butte County | — | — |
| Shimmick/rci Jv | Construction Company INC Shimmick | — | (530) 533 3918 | Other | Oroville · Butte County | — | — |
| Sicke Construction INC | John Delos Sicke | — | (530) 520 0788 | GC, remodel, ADU | Chico · Butte County | — | — |
| Siegfried Framing Contractor | Siegfried Framing Contractor | — | (530) 521 4684 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Sierra Builders | Sierra Builders | — | (661) 201 4592 | GC, remodel, ADU | Chico · Butte County | — | — |
| Sierra Cascade Steel | Sierra Cascade Steel | — | (530) 520 6485 | Other | Chico · Butte County | — | — |
| Sierra Excavating And Grading | David Allen Flournoy | — | (530) 520 8078 | GC, remodel, ADU | Chico · Butte County | — | — |
| Sierra Garden And Landscape | Sierra Garden And Landscape | — | (530) 892 7865 | Windows, patio, painters | Durham · Butte County | — | — |
| Sierra Hardwoods | Sierra Hardwoods | — | (530) 533 7042 | Other | Oroville · Butte County | — | — |
| Sierra Landscape & Maintenance INC | Catherine Spear Gurney | — | (530) 895 0263 | Windows, patio, painters | Chico · Butte County | — | — |
| Sierra Nevada Lath & Plaster | Sierra Nevada Lath & Plaster | — | (530) 570 4552 | Other | Chico · Butte County | — | — |
| Sierra Nevada Sealcoating INC | Timothy Adrian Haley | — | (530) 919-6519 | Other | Chico · Butte County | — | — |
| Sierra Pools INC | Tyler Gene Moreland | — | (530) 514 4369 | Pool | Chico · Butte County | — | — |
| Sierra Roofing Company | Eric Roy Gray | — | (530) 342 1863 | Other roofers | Chico · Butte County | — | — |
| Sierra Tree Services | Julio Cesar Arellano Lizarraga | — | (408) 921 4821 | Other | Palermo · Butte County | — | — |
| Sierra Valley Furniture Installation LP | Jonah Michael Avina | — | (530) 589 4400 | Other | Oroville · Butte County | — | — |
| Sierra Water Ultility LLC | Michael David Butler | — | (530) 680 7079 | Other | Paradise · Butte County | — | — |
| Silver Plumbing Co | Jose Silvestre Trejo Rincon | — | (530) 826 6569 | Other | Chico · Butte County | — | — |
| Silver Ridge Construction | Jin Bo Li | %20laura@silverridgeconstruction.com | (530) 961 6460 | GC, remodel, ADU | Chico · Butte County | — | — |
| Silverado Construction | Roy Franklin Strop | — | (925) 872 0352 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Sinkie's Heating And Cooling | Sinkie's Heating And Cooling | — | (831) 331 1079 | HVAC | Chico · Butte County | — | — |
| Site Constructors INC | Karan Rae Horn | — | (530) 342 8545 | Other | Chico · Butte County | — | — |
| Skyline Steel Erectors INC | Gary Scott Speer | — | (530) 538 9100 | Other | Oroville · Butte County | — | — |
| Slad Construction | Sladariu Linus | — | (916) 915 1850 | Electricians | Oroville · Butte County | — | — |
| Sm Painting | Sm Painting | — | (530) 321 1592 | Windows, patio, painters | Chico · Butte County | — | — |
| Small Construction | Gregory Michael Small | — | (707) 267 5369 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Smalley General Contracting | Robert Herschel Smalley | — | (530) 521 5645 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Smart Mobile Welding And Fabrication | Smart Mobile Welding And Fabrication | — | (530) 282 2366 | Other | Berry Creek · Butte County | — | — |
| Smith Electric | Jimmy Clifford Smith | — | (530) 592 9938 | Electricians | Chico · Butte County | — | — |
| Soldavini Construction And Calcraft Woodworks | Steven Lester Soldavini | — | (530) 966 8067 | GC, remodel, ADU | Chico · Butte County | — | — |
| Solo Steel Erector | Solo Steel Erector | — | (530) 624 5070 | Other | Chico · Butte County | — | — |
| Sommers Construction | Paul Laverne Sommers | — | (530) 624 2874 | GC, remodel, ADU | Bangor · Butte County | — | — |