| Shenandoah Excavating | Shenandoah Excavating | michael@shenandoahexcavating.com | (916) 956 0641 | Other | Fiddletown · Amador County | — | — |
| Shenandoah Nursery & Landscaping | Shenandoah Nursery & Landscaping | — | (209) 607 3025 | Windows, patio, painters | River Pines · Amador County | — | — |
| Sierra Custom Construction | Brandon Michael Sanford | — | (661) 706 5556 | GC, remodel, ADU | Pioneer · Amador County | — | — |
| Sierra Flores Landscape | Sierra Flores Landscape | — | (209) 418 5416 | Windows, patio, painters | Jackson · Amador County | — | — |
| Sierra Foothill Fire Extinguisher Service | Norman Paul Morgan | — | (209) 274 6600 | Other | Ione · Amador County | — | — |
| Sierra Green Builders | Robert Lynn Douglas | — | (209) 283 8712 | GC, remodel, ADU | Sutter Creek · Amador County | — | — |
| Sierra Pool & Spa | Sierra Pool & Spa | contact@sierrapoolandspa.com | — | Pool | Jackson · Amador County | — | — |
| Sierra Pump Company | Kevin Michael Tempel | — | (530) 363 4360 | Other | Jackson · Amador County | — | — |
| Sierra Shade Solutions INC | Chad Michael Barlow | — | (209) 660 0361 | Other | Pioneer · Amador County | — | — |
| Sierra Valley Fire Protection | Sierra Valley Fire Protection | — | (209) 274 4464 | Other | Ione · Amador County | — | — |
| Silver Lined Construction | Samuel Mickey Lausevic | — | (209) 273 8332 | GC, remodel, ADU | Plymouth · Amador County | — | — |
| Simmons Landscape Company | Charles Jacob Simmons | chris@simmonslandscape.com | (209) 223 3787 | Windows, patio, painters | Jackson · Amador County | — | — |
| Source Pest Control | Source Pest Control | — | (951) 709-0206 | Pest, tile roofs | Murrieta · Amador County | — | — |
| South Coast Windows & Doors | South Coast Windows & Doors | — | (619) 456-0884 | Windows, patio, painters | Santee · Amador County | — | — |
| Spanish Creek Co | William Stewart Neely | — | (209) 265 6545 | Other | Ione · Amador County | — | — |
| Special T Builders | Special T Builders | — | (209) 607 1212 | GC, remodel, ADU | Ione · Amador County | — | — |
| Sport Hill Trucking | Robert Emile Fischer | — | (209) 482 2216 | Other | Jackson · Amador County | — | — |
| Stark Construction | David Joseph Stark | proteam@mopro.com | (209) 223 2884 | GC, remodel, ADU | Jackson · Amador County | — | — |
| Steele Environmental Services | Danny Ray Steele | — | (209) 223 4423 | Other | Jackson · Amador County | — | — |
| Stephens Electric | Daniel Eugene Stephens | — | (209) 770 1342 | Electricians | Jackson · Amador County | — | — |
| Sterling Gardens | Sterling Gardens | — | (650) 703 3831 | Windows, patio, painters | Plymouth · Amador County | — | — |
| Steven Stacey | Steven Stacey | — | (209) 419 1876 | Electricians | Pioneer · Amador County | — | — |
| Steven Vargas Construction | Steven Milton Vargas | — | (209) 304 0455 | Other roofers | Pine Grove · Amador County | — | — |
| Stewart David Development & Construction | David Glenn Stewart | — | (209) 649 8984 | GC, remodel, ADU | Pine Grove · Amador County | — | — |
| Stonemill Construction | Steven Clinton Conkle | — | (209) 304 5395 | GC, remodel, ADU | Jackson · Amador County | — | — |
| Sweet Pea Septic | Lisa Rae Phillips | info@sweetpeaseptic.com | (209) 267 5010 | Other | Sutter Creek · Amador County | — | — |
| T K Construction | Terry Arnold Schmidt | — | (209) 598 2208 | GC, remodel, ADU | Plymouth · Amador County | — | — |
| Tanner & Sons Masonry INC | Danielle Lenore Tanner | — | (530) 719 1200 | Other | Plymouth · Amador County | — | — |
| Tanner & Tanner Enterprises LLC | Danielle Lenore Tanner | — | (530) 719 1200 | GC, remodel, ADU | Plymouth · Amador County | — | — |
| Taylor Landscaping | Taylor Landscaping | — | (209) 304 7100 | Windows, patio, painters | Sutter Creek · Amador County | — | — |
| Taylor Made Pools | Taylor Made Pools | davetaylormadepoolsinc@gmail.com | (844) 344-7665 | Pool | Sun City · Amador County | — | — |
| Tdl Construction | Tyler Dale Ludwick | — | (916) 897 6989 | GC, remodel, ADU | Ione · Amador County | — | — |
| Terry Lee Campbell Construction | Terry Lee Campbell | — | (209) 295 5575 | GC, remodel, ADU | Pioneer · Amador County | — | — |
| The Campbell Corporation DBA Campbell Forest | Michael Roger Lewis | — | (916) 340 4469 | Other | Sutter Creek · Amador County | — | — |
| The Gutter Guy | The Gutter Guy | — | (209) 419 2788 | Other | Ione · Amador County | — | — |
| Thomas A Oneto Jr | Thomas A Oneto Jr | — | (209) 765 6392 | Other | Jackson · Amador County | — | — |
| Tim Adams General Contractor | Tim Adams General Contractor | — | (209) 481 8242 | GC, remodel, ADU | Ione · Amador County | — | — |
| Tjpatla Construction INC | Thomas John Patla | — | (209) 608 3822 | GC, remodel, ADU | Pine Grove · Amador County | — | — |
| Tom Binns Construction | Thomas Lee Binns | — | (916) 212 1060 | GC, remodel, ADU | Plymouth · Amador County | — | — |
| Tom Powell Painting | Tom Powell Painting | nickquint@yahoo.com | (209) 304 8186 | Windows, patio, painters | Ione · Amador County | — | — |