| Sierra Valley Roofing & Construction | Joseph Randolph Ekkelboom | — | (916) 599 7733 | Other roofers | Loomis · Placer County | — | — |
| Sierra View General Contractor | Donald Mark Davis | — | (916) 774 7000 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Sierra View Home Improvements | Sierra View Home Improvements | — | (916) 870 0898 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Sierra Wes Wall Systems INC | Eric Earl Stilwell | — | (916) 652 4491 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Sierra West Construction INC | Casey Michael Ahrens | ed.sierrawest@gmail.com | (530) 268 7614 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Sierra West Electrical LLC | Jimmie Anthony Diaz | — | (530) 217 7292 | Electricians | Auburn · Placer County | — | — |
| Sierra Woodworks | Sierra Woodworks | — | (530) 412 0024 | GC, remodel, ADU | Tahoma · Placer County | — | — |
| Sights Construction & Consulting | Charles Lee Sights | — | (310) 502 1180 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sigma Co | Poljak Danilo | — | (916) 206 7908 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Sign Knowledge INC | Karla M Vasquez De Prahl | — | (800) 241 0239 | Other | Granite Bay · Placer County | — | — |
| Sign Of Light INC | William James Batterman | — | (916) 797 9445 | Electricians | Loomis · Placer County | — | — |
| Signature Plumbing | Thomas Clancy Thompson | interested@domainmarket.com | (916) 521 6761 | Other | Rocklin · Placer County | — | — |
| Siller Construction Co | Melanie Rienhardt Siller | — | (530) 682 0130 | Other | Lincoln · Placer County | — | — |
| Silva's Landscape By Design | Michael Vincent Silva | — | (530) 878 5073 | Windows, patio, painters | Auburn · Placer County | — | — |
| Silver Fern Construction & Remodeling | Hendrick William Fooy | — | (209) 607 0194 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Silver Lining Electric | Alexander Jovan Wilkins | alex@silverliningelectric.com | (916) 807 1999 | Electricians | Roseville · Placer County | — | — |
| Simon Developments | Simon Developments | — | (916) 806 7927 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Simon General Construction | Douglas Erick Simon | — | (530) 401 4076 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Simple Renovations & Design | Simple Renovations & Design | — | (510) 468 7155 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Simple Turns INC | Matthew Kenneth Leatherman | — | (916) 367 9123 | GC, remodel, ADU | Penryn · Placer County | — | — |
| Simplified Construction Solutions | Marcus Gerard Whitley | — | (916) 879 0035 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Simply Cabinet Solutions | Simply Cabinet Solutions | — | (916) 612 0620 | Other | Roseville · Placer County | — | — |
| Simply Restored Surfaces | Simply Restored Surfaces | — | (916) 878 6851 | Other | Granite Bay · Placer County | — | — |
| Simply Service Landscaping | Jose Richard Batista | — | (916) 282 5880 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Simpson & Simpson INC | Sherilyn X Simpson | — | (530) 885 4354 | Other | Auburn · Placer County | — | — |
| Simpson Pool Service | Thomas James Simpson | — | (916) 628 5564 | Pool | Meadow Vista · Placer County | — | — |
| Sinclair Concrete | Kristina Marie Pourfathi | — | (916) 663 0303 | Other | Penryn · Placer County | — | — |
| Sindt Tree Service | Jared Joseph Sindt | sindttreeservice@gmail.com | (530) 368 3291 | Other | Auburn · Placer County | — | — |
| Sipes Construction | Marvin Lavaughn Sipes | — | (760) 835 9415 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sirus Dutton Homes | Sirus Dutton Homes | — | (831) 212 7874 | GC, remodel, ADU | Colfax · Placer County | — | — |
| Sitewise Construction INC | Samuel Joseph Varner | info@sitewiseconstruction.com | (916) 765 7751 | Other | Roseville · Placer County | — | — |
| Sjn Construction LLC | Sean Joseph Neves | — | (530) 512 5031 | GC, remodel, ADU | Colfax · Placer County | — | — |
| Skinner Construction INC | Billy Ray Skinner | — | (530) 320 9346 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Sky Limit Const | Sky Limit Const | — | (209) 304 4262 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sky Painting | Sky Painting | — | (530) 386 7230 | Windows, patio, painters | Colfax · Placer County | — | — |
| Skycap Roofing | John Dylon Ritchie | — | (707) 332 8094 | Other roofers | Loomis · Placer County | — | — |
| Skyline Electric | Steve Troy Thurmon | interested@domainmarket.com | (530) 906 5850 | Electricians | Auburn · Placer County | — | — |
| Skyline Exteriors INC | Gregory Lee Petty | — | (866) 574 4295 | GC, remodel, ADU | Granite Bay · Placer County | — | — |
| Skyline Solar Energy | Jerry Dean Mckaughan | — | (916) 862 1800 | Windows, patio, painters | Roseville · Placer County | — | — |
| Skystone Concrete INC | Esparza Francisco Tapia | skystone@fztsy.net | (916) 284 2437 | Other | Rocklin · Placer County | — | — |