| Sharp Lines Construction | Gabriel Micah Sharp | — | (530) 362 0549 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sharp Woodwork | Sharp Woodwork | sharpwoodwork@gmail.com | (530) 401 2507 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Shaun Davis Painting | Shaun Davis Painting | — | (530) 272 3876 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Shawn Blue | Shawn Blue | — | (530) 559 3612 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Shawns Tree Service | Shawn Edward Fields | — | (916) 241 5277 | Tree | Nevada City · Nevada County | — | — |
| Sherwood Tree Service | Matthew James Pederson | — | (530) 214 0624 | Other | Truckee · Nevada County | — | — |
| Shine Plumbing & Drain LLC | Daniel Lee Foss | — | (530) 559 6937 | Other | Grass Valley · Nevada County | — | — |
| Sidebottom Construction INC | Aaron Scott Sidebottom | — | (530) 913 5714 | GC, remodel, ADU | Cedar Ridge · Nevada County | — | — |
| Sidewalk Safety INC | Alexander James Coring | — | (916) 837 2343 | Other | Grass Valley · Nevada County | — | — |
| Sierra Backflow | Sierra Backflow | — | (530) 412 0354 | Other | Truckee · Nevada County | — | — |
| Sierra Construction Management | Jeremy Tyler Boekweg | jeremyboekweg@gmail.com | (530) 210 5092 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| Sierra Craftsman INC | John Francis Mc Cabe | info@sierracraftsman.com | (530) 412 0608 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Sierra Defensible Space Tree Service Co | Ryan Ross Edwards | — | (530) 386 4535 | Tree | Truckee · Nevada County | — | — |
| Sierra Excavating INC | Richard Spencer Tesene | — | (530) 277 2182 | Other | Nevada City · Nevada County | — | — |
| Sierra Foothills Construction Company | Lane Keoni Allen | — | (530) 477 5300 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sierra Nevada Radon LLC | Brian Ross Powell | — | (530) 717 0723 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sierra Paint & Chemical INC | Howard Chandler Jones | — | (775) 843 3286 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sierra Pool & Spa | Sierra Pool & Spa | contact@sierrapoolandspa.com | — | Pool | Nevada City · Nevada County | — | — |
| Sierra Precision Electric | Daniel George Zwatschka | — | (908) 922 2650 | Electricians | Truckee · Nevada County | — | — |
| Sierra Precision Painting | Sierra Precision Painting | sierraprecisionpainting@gmail.com | (530) 550 7938 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sierra Premier Painting | Sierra Premier Painting | — | (530) 386 1242 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sierra Rain | Sierra Rain | — | (775) 771 0161 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sierra Rejuvenation Construction | Joseph Gerard Jakubowski | — | (530) 559 2242 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| Sierra Shades LLC | Chelsea Renee Rentschler | contact@sierra-shades.com | (530) 278-8178 | Other | Grass Valley · Nevada County | — | — |
| Sierra Small Jobs | Sierra Small Jobs | sierrasmalljobs@gmail.com | (858) 220 2395 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Sierra Smart Home Systems | David Scott Coates | — | (530) 414 1850 | Other | Truckee · Nevada County | — | — |
| Sierra Sun Fence And Landscaping | Sierra Sun Fence And Landscaping | — | (530) 274 2001 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Sierra Surfaces Floor Covering | Sierra Surfaces Floor Covering | — | (530) 562 7008 | Other | Truckee · Nevada County | — | — |
| Sierra Timberline INC | Linda Kaye Stahmer | info@sierratimberline.com | (530) 273 4822 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sierra Truckee Construction | Navarro Oswaldo Berrelleza | sierratruckeeconstruction@gmail.com | (530) 386 4953 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Sierra Valley Pool Service | Randall James Nolan | — | (530) 210 1814 | Pool | Grass Valley · Nevada County | — | — |
| Sierra Window Coverings | Sierra Window Coverings | — | (530) 587 2131 | Other | Truckee · Nevada County | — | — |
| Sierrascape INC | Randy Oliver Nunez | randy@sierrascaping.com | (530) 308 0655 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sigety's Remodeling | Sigety's Remodeling | — | (925) 584 4440 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| Siller & Siller Construction INC | Neal Mac Arthur Siller | — | (916) 893 3462 | Other | Penn Valley · Nevada County | — | — |
| Silvas Construction | Silva Nunez Antonio | — | (916) 834 9479 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Silverwood Construction INC | Michael David Parker | — | (530) 263 7539 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Simco Plumbing INC | Gary Edward Sims | — | (714) 863 4400 | Other | Nevada City · Nevada County | — | — |
| Ski Town Iron Works | Ski Town Iron Works | — | (530) 305 8841 | Other | Truckee · Nevada County | — | — |
| Skyler Electric Co INC | David Alan Ferguson | — | (530) 273 5100 | Electricians | Grass Valley · Nevada County | — | — |