| S N S Construction | Matthew Anthony Mantovan-hudgens | — | (530) 913 3186 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| S T S Land Improvement | S T S Land Improvement | — | (916) 276 4953 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Sa-fire Integrated Protection INC | Nathaniel Hans Belmont | — | (530) 272 5650 | Electricians | Grass Valley · Nevada County | — | — |
| Sacramento Metropolitan Enterprises | Robert Eugene Sr Smeja | — | (916) 532 0490 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sacred Oak Flooring | Sacred Oak Flooring | — | (530) 781 2049 | Other | Grass Valley · Nevada County | — | — |
| Sagebrush Painter | Sagebrush Painter | — | (801) 828 8126 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Sahnow Properties | Sahnow Properties | — | (916) 996 9700 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Salcedo Tile | Salcedo Tile | — | (530) 913 8305 | Other | Grass Valley · Nevada County | — | — |
| Salyers Construction | Nicholas Robert Salyers | — | (530) 557 7770 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Samson Whittingslow | Samson Whittingslow | — | (530) 559 8974 | Tree | Grass Valley · Nevada County | — | — |
| Santa Cruz Groundwater | Santa Cruz Groundwater | — | (831) 345 4902 | Other | Nevada City · Nevada County | — | — |
| Savalin Tree Service | Rick Dawson Savalin | — | (530) 301 0822 | Tree | Penn Valley · Nevada County | — | — |
| Sawtooth Development | Sawtooth Development | — | (530) 448 6345 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Schaut Construction | Nicholas Fritz Schaut | — | (530) 328 9320 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Scope Landscape Management INC | Miguel Angel Palomares Arias | — | (530) 274 9999 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Scott Harms Construction | Jeffrey Scott Harms | — | (530) 913 4914 | GC, remodel, ADU | Rough And Ready · Nevada County | — | — |
| Scott J Mickelson General Contractor | Scott J Mickelson General Contractor | — | (530) 477 2128 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| Scott Kain Construction | Scott Ted Kain | — | (530) 559 8665 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Scott Kastning Construction | Scott Michael Kastning | — | (530) 277 2633 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Scott Mickelson Construction INC | Scott Anthony Mickelson | — | (530) 277 9050 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Scott Morrison Construction | Scott Allen Morrison | — | (530) 448 9827 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Scott R Wheeler Construction | Scott Randall Wheeler | — | (530) 273 6430 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Scott Rose Construction | Scott Randall Rose | — | (530) 386 2594 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Screen Mobile Of Marin INC | Jonathan Lyle D'antonio | — | (916) 677 7242 | Other | Grass Valley · Nevada County | — | — |
| Sean Burke | Sean Burke | — | (518) 637 1719 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Sean Matthew Anderson | Sean Matthew Anderson | — | (530) 709 9223 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Sean Mc Mahon | Sean Mc Mahon | — | (530) 587 2682 | Other | Truckee · Nevada County | — | — |
| Sean Thompson Drywall & Construction | Sean Timothy Thompson | — | (530) 913 4489 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Seghezzi Enterprises | Michael Anthony Seghezzi | — | (530) 913 8189 | Other | Nevada City · Nevada County | — | — |
| Select Builders | Jon David Lefebre | — | (707) 367 5416 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Seppi Construction | Mark Ernest Seppi | — | (530) 906 2604 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Serene Lakes Enterprises | Steve Edward Alexander | — | (530) 426 9100 | Electricians | Soda Springs · Nevada County | — | — |
| Set Construction | Scott Edward Thompson | — | (530) 412 1935 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Sether Roofing & Construction INC | Rick Earl Sether | — | (530) 265 0994 | Other roofers | Grass Valley · Nevada County | — | — |
| Sgambati Painting Co | Christopher Michael Sgambati | — | (530) 906 5191 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Sgv Refrigeration LLC | Scott Mitchell Van Natta | — | (650) 504 7637 | HVAC | Truckee · Nevada County | — | — |
| Shadburne Construction | John William Shadburne | — | (530) 263 8454 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Shaffer Paving | Gerald Paul Meng | — | (530) 587 1125 | Other | Truckee · Nevada County | — | — |
| Shaffer Sealing Company | Robert Vincent Shaffer | shaffersealing@gmail.com | (530) 587 0470 | Other | Truckee · Nevada County | — | — |
| Shaker Corporation | James Robert Glazier | — | (775) 770 4400 | GC, remodel, ADU | Truckee · Nevada County | — | — |