| Showtime Roofing & Remodeling INC | Mark Anthony Davis | — | (916) 771 9500 | Other roofers | Roseville · Placer County | — | — |
| Shrubs & Tubs | Shrubs & Tubs | — | (530) 545 0661 | Windows, patio, painters | Tahoe City · Placer County | — | — |
| Siarhei Dzemidovich | Siarhei Dzemidovich | — | (916) 213 3556 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Siding Standard | Siding Standard | — | (916) 318 2718 | Windows, patio, painters | Foresthill · Placer County | — | — |
| Sierra Blue Pools INC | Kurt Anthony Hinz | — | (916) 282 4343 | Pool | Granite Bay · Placer County | — | — |
| Sierra Building Systems INC A Low Voltage Integrator | David Vincent Frechette | — | (530) 637 5550 | Electricians | Rocklin · Placer County | — | — |
| Sierra Carpet Care | Sierra Carpet Care | — | (916) 652 5934 | Other | Loomis · Placer County | — | — |
| Sierra Cascade Painting | Sierra Cascade Painting | — | (530) 386 1869 | Windows, patio, painters | Kings Beach · Placer County | — | — |
| Sierra Comm | Chad Charles Vignola | — | (916) 300 9712 | Electricians | Auburn · Placer County | — | — |
| Sierra Concrete Resurfacing | Dwight Allen Johnson | — | (916) 773 4186 | Other | Loomis · Placer County | — | — |
| Sierra Conveyance And Automation LLC | Ryan John Seidel | — | (916) 645 7794 | Other | Rocklin · Placer County | — | — |
| Sierra Custom Cabinets INC | Derrick Keith Harvey | — | (530) 613 2166 | Other | Auburn · Placer County | — | — |
| Sierra Edge Construction | Stanley Joseph Iii Kososki | sierraedgeconstruction@gmail.com | (916) 521 6321 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Sierra Fiberglass Pools INC DBA Jensen Custom Homes | Matthew Allen Jensen | — | (916) 871 5973 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sierra Fire Alarm INC | Louis Wayne Montero | office@sierrafirealarm.com | (916) 630 1472 | Electricians | Rocklin · Placer County | — | — |
| Sierra Flow Landscaping And Waterscapes | Sierra Flow Landscaping And Waterscapes | — | (530) 414 0508 | Windows, patio, painters | Colfax · Placer County | — | — |
| Sierra Hills Roofing | William Neal Coleman | — | (916) 975 5095 | Other roofers | Newcastle · Placer County | — | — |
| Sierra Home Plumbing & Repair | Sierra Home Plumbing & Repair | — | (530) 210 4271 | Other | Auburn · Placer County | — | — |
| Sierra Insulation Co INC | Corey Scott William | — | (530) 889 2186 | Other | Auburn · Placer County | — | — |
| Sierra Interior Trim | Sierra Interior Trim | — | (925) 818 9200 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sierra Line Construction INC | Serge Vasilyevich Zhilko | — | (916) 712 1129 | GC, remodel, ADU | Rocklin · Placer County | — | — |
| Sierra Nevada Electric INC | Richard Rhoads Cotten | — | (530) 887 9000 | Electricians | Auburn · Placer County | — | — |
| Sierra Property Partners Inc. | Sierra Property Partners Inc. | — | (530) 823-8604 | Property managers | Auburn · Placer County | — | — |
| Sierra Rainbow Painting INC | Melissa Dong Mountain | — | (530) 583 1083 | Windows, patio, painters | Tahoe City · Placer County | — | — |
| Sierra Ridge Heating And Aire | Sierra Ridge Heating And Aire | — | (916) 472 5311 | HVAC | Granite Bay · Placer County | — | — |
| Sierra Safehaven Landscapes | Donald Jay Richert | — | (916) 765 1641 | Windows, patio, painters | Weimar · Placer County | — | — |
| Sierra Sage Roofing INC | Caleb Sage Turk | — | (530) 583 1976 | Other roofers | Tahoe City · Placer County | — | — |
| Sierra Septic Service & Supply Co | Guy Lavell Ostenson | — | (530) 885 3492 | Other | Newcastle · Placer County | — | — |
| Sierra Shower Pans INC | David Scott Sewell | — | (530) 320 4089 | Other | Newcastle · Placer County | — | — |
| Sierra Skyline Construction | David Jay Eichenberg | — | (530) 913 2595 | GC, remodel, ADU | Tahoe City · Placer County | — | — |
| Sierra Solid Surfaces INC | William Warren Hurney | — | (530) 305 1078 | Other | Auburn · Placer County | — | — |
| Sierra Steelworks LLC | Garin Caley Moore | — | (530) 210 5547 | Other | Applegate · Placer County | — | — |
| Sierra Structure INC | Joel Torrance Hilbert | — | (916) 275 1971 | GC, remodel, ADU | Meadow Vista · Placer County | — | — |
| Sierra Tahoe Snow Removal & Sealing | Matthew Timothy Schwab | — | (530) 412 4677 | Other | Tahoe City · Placer County | — | — |
| Sierra Tile And Plaster | Sierra Tile And Plaster | — | (530) 412 2401 | Other | Tahoe City · Placer County | — | — |
| Sierra Traffic Markings INC | Ronald William Johnson | — | (916) 774 9080 | Other | Roseville · Placer County | — | — |
| Sierra Trim INC | William David Snow | info@sierratrim.com | (916) 259 2966 | Other | Loomis · Placer County | — | — |
| Sierra Valley Builders INC | Joseph Kwang Kim | — | (916) 813 5084 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Sierra Valley Construction | Curtis Wayne Cook | — | (916) 257 2212 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Sierra Valley Painting INC | Jake Benjamin Mc Culloch | marcy@sierravalleypainting.com | (916) 788 1044 | Windows, patio, painters | Roseville · Placer County | — | — |