| Son-shine Painting Company | Alvin James Jr Cahee | rich@sonshinepainting.com | (530) 228 8880 | Windows, patio, painters | Oroville · Butte County | — | — |
| Sorenson Concrete INC | Wendell Thomas Sorenson | — | (530) 894 8690 | GC, remodel, ADU | Chico · Butte County | — | — |
| Soria And Sun Landscapes INC | Soria Naira | — | (530) 990 1450 | Windows, patio, painters | Oroville · Butte County | — | — |
| Soria's Landscapes | Soria's Landscapes | soriaslandscapes@yahoo.com | (530) 370 4747 | Windows, patio, painters | Palermo · Butte County | — | — |
| South Fork Enterprises | Brett Matthew Berger | — | (530) 990 5015 | GC, remodel, ADU | Oroville · Butte County | — | — |
| Southgate Construction Company INC | Louis Gage Iii Chrysler | — | (530) 891 4533 | GC, remodel, ADU | Chico · Butte County | — | — |
| Spainhower Building Services | Chris Todd Spainhower | — | (530) 762 8552 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Spallina Garrard Contracting LLC | James Anthony Iii Spallina | — | (530) 774 5951 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Specialized Shaping | Specialized Shaping | — | (530) 521 0829 | Other | Durham · Butte County | — | — |
| Spectrum Landscapes | Spectrum Landscapes | — | (530) 873 9011 | Windows, patio, painters | Magalia · Butte County | — | — |
| Speedy-clean Painting & Pressure Washing | Speedy-clean Painting & Pressure Washing | — | (530) 966 6909 | Windows, patio, painters | Chico · Butte County | — | — |
| Spray Chem Chemical Co INC | Timothy Brian Jacobson | — | (530) 895 3658 | Other | Durham · Butte County | — | — |
| Sprinkler Techs | Sergey Pavlovich Plugovoy | — | (916) 834 9859 | Windows, patio, painters | Oroville · Butte County | — | — |
| Sprinklers | Olga Viktorovna Plugovoy | — | (916) 342 7829 | Windows, patio, painters | Oroville · Butte County | — | — |
| Squyres Fire Protection INC | Brandon Dallas Squyres | — | (530) 345 1012 | GC, remodel, ADU | Chico · Butte County | — | — |
| Stainless Aesthetics INC | Jayce Curtis Steinberg | — | (530) 680 9894 | Other | Durham · Butte County | — | — |
| Stanley B Mcdaniel Construction | Stanley Brett Mc Daniel | — | (530) 966 4159 | Other roofers | Paradise · Butte County | — | — |
| Stanley Electric | Michael Lewis Stanley | — | (530) 868 1865 | Electricians | Biggs · Butte County | — | — |
| Star Energy Management INC | Robert Allan Birkholz | — | (530) 532 9250 | Electricians | Oroville · Butte County | — | — |
| Starling Construction | Lance Garrett Cochrane | — | (530) 570 1856 | GC, remodel, ADU | Chico · Butte County | — | — |
| Steadfast Electric | Dean Michael Thomas | — | (225) 364-9218 | Electricians | Magalia · Butte County | — | — |
| Steave O Cox Construction INC | Riley Danner Cox | — | (530) 566 5966 | GC, remodel, ADU | Chico · Butte County | — | — |
| Steel-crete INC | Matthew Peter Moser | — | (530) 399 0032 | Other | Durham · Butte County | — | — |
| Steele's Roofing INC | Mark Allen Steele | — | (530) 895 8970 | Other roofers | Chico · Butte County | — | — |
| Steve Caperello Painting | Steve Caperello Painting | caperellopainting@yahoo.com | (530) 828 1821 | Windows, patio, painters | Chico · Butte County | — | — |
| Steve Deadmond Construction | Steven Douglas Deadmond | — | (530) 521 0907 | GC, remodel, ADU | Chico · Butte County | — | — |
| Steve Orsillo Construction | Mark Steven Orsillo | — | (530) 682 9534 | GC, remodel, ADU | Oroville · Butte County | — | — |
| Steve Reis Painting INC | Alles Lyn Reis | — | (530) 846 4101 | Windows, patio, painters | Gridley · Butte County | — | — |
| Steve Shaw | Steve Shaw | steve@steveshaw.com | (530) 591 2207 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Steve's Tile INC | Steven Paul Groos | — | (530) 624 9026 | Other | Paradise · Butte County | — | — |
| Steven D Lane Construction INC | Steven Daniel Lane | — | (530) 624 6697 | GC, remodel, ADU | Chico · Butte County | — | — |
| Steven Smith Flooring | Steven Smith Flooring | — | (530) 588 2867 | Other | Chico · Butte County | — | — |
| Stewart Excavation Company | Evan Joseph Stewart | — | (530) 321 5870 | Other | Gridley · Butte County | — | — |
| Stidham Plumbing | Stidham Plumbing | — | (530) 570 3314 | Other | Biggs · Butte County | — | — |
| Stiemsma Jeff Contracting | Jeffrey Carl Stiemsma | — | (530) 781 4545 | GC, remodel, ADU | Chico · Butte County | — | — |
| Stiles Construction | Samuel Tyler Stiles | — | (530) 513 4957 | GC, remodel, ADU | Paradise · Butte County | — | — |
| Stimson Construction Company | Harold Alton Stimson | — | (530) 873 1308 | GC, remodel, ADU | Magalia · Butte County | — | — |
| Stone Works By Wuestefeld | Stone Works By Wuestefeld | — | (530) 624 3174 | Other | Chico · Butte County | — | — |
| Story Heating And Air | Story Heating And Air | — | (530) 899 9293 | HVAC | Chico · Butte County | — | — |
| Straight Edge Tile | Straight Edge Tile | — | (530) 701 8766 | Other | Chico · Butte County | — | — |