| Simmons Fire Systems | Simmons Fire Systems | — | (925) 323 9603 | Other | Placerville · El Dorado County | — | — |
| Simms Electric | Robert Edward Dal Porto | — | (650) 676 0860 | Electricians | Shingle Springs · El Dorado County | — | — |
| Siracusa Construction | Nicholi David Siracusa | — | (707) 249 8178 | GC, remodel, ADU | Georgetown · El Dorado County | — | — |
| Sizemore Construction | Christopher Jackson Sizemore | — | (530) 306 0191 | GC, remodel, ADU | Shingle Springs · El Dorado County | — | — |
| Sk Bennett INC | Steven Keith Bennett | — | (916) 899 9986 | GC, remodel, ADU | Rescue · El Dorado County | — | — |
| Sk Construction | Sean Patrick Kennedy | — | (530) 306 6170 | GC, remodel, ADU | Cameron Park · El Dorado County | — | — |
| Ski Air Incorporated | Michael Leonard Lubinski | — | (530) 626 4010 | HVAC | Placerville · El Dorado County | — | — |
| Sky High Roofing INC | Richard Earl Case | — | (530) 295 3900 | Other roofers | Placerville · El Dorado County | — | — |
| Skye Built Custom Cabinetry & Woodworks | Schumaker Skye | — | (530) 316 0476 | Other | South Lake Tahoe · El Dorado County | — | — |
| Skyline Roofing Solutions | Skyline Roofing Solutions | — | (916) 545-7668 | Other roofers | El Dorado Hills · El Dorado County | — | — |
| Skyline Showers And Glass | Skyline Showers And Glass | — | (530) 387 7636 | Windows, patio, painters | Cameron Park · El Dorado County | — | — |
| Slaight Mountain Construction | Justin Steven Slaight | slaightmountainconstruction@gmail.com | (530) 363-5349 | GC, remodel, ADU | Kyburz · El Dorado County | — | — |
| Slate & Ember Custom Home Building | Shawn S G Clevenger | — | (408) 640 0765 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Sle Construction INC | Scott Lee Ebrahimi | info@sleconstruction.com | (916) 358 3737 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Smalley Construction | Ryan Andrew Smalley | sheila@smalleyco.com | (530) 919 2349 | GC, remodel, ADU | Placerville · El Dorado County | — | — |
| Smith Construction Co | Jason Richard Smith | — | (916) 343 3834 | GC, remodel, ADU | Placerville · El Dorado County | — | — |
| Smits Solar Heating + Air | Jeffrey Michael Turner | — | (530) 622 8446 | HVAC | Diamond Springs · El Dorado County | — | — |
| Smt Tree Service INC | Elizabeth Santana | — | (530) 417 7573 | Other | Placerville · El Dorado County | — | — |
| Snipes Construction Incorporated | Tim Andrew Snipes | — | (916) 939 4303 | GC, remodel, ADU | El Dorado Hills · El Dorado County | — | — |
| Snowline Construction | James David Mault | — | (530) 903 1473 | GC, remodel, ADU | Pollock Pines · El Dorado County | — | — |
| Snowline Plumbing INC | Louis Joseph Palacio | — | (530) 409 7371 | Other | Placerville · El Dorado County | — | — |
| Snowsurfing International INC | Jeffrey Lyndon Grell | — | (831) 227 5581 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| Snyder Construction & Electric INC | Robert Martin Snyder | — | (530) 417 5364 | Electricians | Placerville · El Dorado County | — | — |
| Soaks Fire Protection | Soaks Fire Protection | — | (530) 307 8726 | Other | South Lake Tahoe · El Dorado County | — | — |
| Soetaert Quality Painting INC | Matthew Mark Soetaert | — | (916) 996 0504 | Windows, patio, painters | Placerville · El Dorado County | — | — |
| Solar And Roof Direct | Jessica Rose Gluck | — | (916) 936 6045 | Other roofers | Shingle Springs · El Dorado County | — | — |
| Solarado Roofing & Solar | Michael Scott Schroeter | info@solarado-ca.com | (916) 413 7376 | Other roofers | Cameron Park · El Dorado County | — | — |
| Solarhut LLC | Jeffery Lang Gee | — | (530) 651 5111 | Electricians | Diamond Springs · El Dorado County | — | — |
| Solectric Corp | Navarrete Garcia Daniel | — | (916) 719 0074 | Electricians | El Dorado Hills · El Dorado County | — | — |
| Somerset Plumbing Company | Louis Joseph Palacio | — | (530) 626 7842 | Other | Somerset · El Dorado County | — | — |
| Son Ray's HVAC LLC | Raymond Joseph Rosario | rrosario@sonrayshvac.com | (916) 342 4578 | HVAC | Pollock Pines · El Dorado County | — | — |
| Sones Const | Sones Const | — | (530) 545 0377 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| South Bay Remodel | South Bay Remodel | — | (408) 483 6125 | GC, remodel, ADU | Cameron Park · El Dorado County | — | — |
| South Coast Construction | Steven Patrick Irving | — | (661) 992 4024 | GC, remodel, ADU | Cool · El Dorado County | — | — |
| South County Construction And Painting | Jeff Richard Mercer | — | (530) 499 0627 | GC, remodel, ADU | Placerville · El Dorado County | — | — |
| South Lake Landscaping | Justin David Rothstein | — | (530) 721 7075 | Windows, patio, painters | South Lake Tahoe · El Dorado County | — | — |
| South Lake Tahoe Electric | Erick Roy Asbury | — | (530) 721 5365 | Electricians | South Lake Tahoe · El Dorado County | — | — |
| South Shore Custom Builders LLC | Peter Louis Stromberg | peter@southshorecustombuilders.com | (530) 307 3112 | GC, remodel, ADU | South Lake Tahoe · El Dorado County | — | — |
| South Shore Electric | Eric David Blurton | — | (530) 307 8932 | Electricians | South Lake Tahoe · El Dorado County | — | — |
| South Shore Fence | Scott William Del Vecchio | — | (530) 573 8923 | Other | Camino · El Dorado County | — | — |