| Sol Sierra INC | Victor Maurice Guillot | — | (209) 795 3554 | Electricians | Avery · Calaveras County | — | — |
| Soulier Sanitation | Soulier Sanitation | — | (209) 736 5781 | Other | Copperopolis · Calaveras County | — | — |
| Souza & Sons Heating And Cooling INC | Tyler John Souza | — | (209) 346 6210 | HVAC | Valley Springs · Calaveras County | — | — |
| Speaker & Sons Construction | Michael Edward Speaker | — | (916) 704 5471 | GC, remodel, ADU | Mokelumne Hill · Calaveras County | — | — |
| Speed Construction | Shane Andrew Speed | — | (209) 770 4717 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Spring Creek Water Gardens And Landscape | Michael Thomas Saia | — | (209) 772 2766 | Windows, patio, painters | Valley Springs · Calaveras County | — | — |
| Springman Sierra Builders INC | Peter Barnes Springman | — | (209) 770 2465 | GC, remodel, ADU | Hathaway Pines · Calaveras County | — | — |
| Star Dog Custom Painting | Star Dog Custom Painting | — | (209) 588 6777 | Windows, patio, painters | Murphys · Calaveras County | — | — |
| Steele Tech Solutions | Steele Tech Solutions | — | (209) 736 7070 | Other | Arnold · Calaveras County | — | — |
| Stephen Amestoy Construction | Stephen Edward Amestoy | — | (209) 481 2310 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Stephens Construction INC | Damien Clifford Stephens | — | (209) 795 3154 | HVAC | Arnold · Calaveras County | — | — |
| Steve Lagares Backhoe Service | Steven Wayne Lagares | — | (510) 393 7420 | Other | Valley Springs · Calaveras County | — | — |
| Steven James Marks | Steven James Marks | — | (209) 770 0397 | Electricians | Copperopolis · Calaveras County | — | — |
| Sticks | Philip Richard Snyder | — | (916) 947 6033 | Other | Valley Springs · Calaveras County | — | — |
| Stivers Construction INC | Jacob Clay Stivers | — | (209) 304-3249 | GC, remodel, ADU | West Point · Calaveras County | — | — |
| Stone Construction | Brett John Stone | — | (209) 642 5298 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Storage Material Installation Specialist | Daniel Matthew Howard | — | (209) 772 1535 | Other | Valley Springs · Calaveras County | — | — |
| Stu's Electrical Service LLC | Stuart Frank Hacker | — | (209) 213 1606 | Electricians | Arnold · Calaveras County | — | — |
| Stuebner Construction | Chris Mark Stuebner | — | (209) 603 5036 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Suazo Floor Cover | Suazo Floor Cover | — | (209) 321 5562 | Other | Angels Camp · Calaveras County | — | — |
| Suburban Designs Landscaping | Suburban Designs Landscaping | — | (650) 400 3336 | Windows, patio, painters | San Andreas · Calaveras County | — | — |
| Success Rentals Property Management | Success Rentals Property Management | — | (858) 951-5361 | Property managers | Rancho Santa Fe · Calaveras County | — | — |
| Sue's Custom Gardens | Sue's Custom Gardens | — | (209) 890 6013 | Windows, patio, painters | Angels Camp · Calaveras County | — | — |
| Summit Construction | Jeffery Fredrick Porter | — | (209) 728 1526 | GC, remodel, ADU | Murphys · Calaveras County | — | — |
| Sun Valley Heating & Air Conditioning | Daniel Thomas Staton | — | (925) 254 8810 | HVAC | Copperopolis · Calaveras County | — | — |
| Sunset Tree Service | Theodore Joseph Faia | — | (650) 868 0595 | Windows, patio, painters | Copperopolis · Calaveras County | — | — |
| T N T Plastering | Donald Lee Thorvund | — | (209) 836 1158 | Other | Copperopolis · Calaveras County | — | — |
| T R Construction Co | Tommy Vance Rowell | — | (209) 406 1774 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Tamarack | Kenneth Eugene Emerson | — | (209) 552 9756 | GC, remodel, ADU | Murphys · Calaveras County | — | — |
| Tanko Well Drilling | Rosalee Josephine Hayes | contact@sansoxygen.com | (209) 736 2992 | Other | Altaville · Calaveras County | — | — |
| Tara-Lu Construction INC | Tara-Lu Construction INC | — | (916) 335-7697 | GC, remodel, ADU | San Andreas · Calaveras County | — | — |
| Taylor Construction | Anthony D'arcy Taylor | — | (209) 304 0678 | GC, remodel, ADU | Mokelumne Hill · Calaveras County | — | — |
| Techocentral Roofing | Techocentral Roofing | — | (227) 262-8275 | Other roofers | Solana Beach · Calaveras County | — | — |
| Terrain Landscape & Garden Service | Laura Ann Sternick | — | (209) 785 1466 | Windows, patio, painters | Copperopolis · Calaveras County | — | — |
| Terrell Construction | Kyle Robert Terrell | — | (209) 327 7928 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Terriberry Electric | Kenneth Matthew Terriberry | — | (650) 255 2910 | Electricians | Murphys · Calaveras County | — | — |
| Terry L Thompson Construction INC | Kyle Lucas Thompson | — | (209) 728 2407 | GC, remodel, ADU | Murphys · Calaveras County | — | — |
| The Buhler Company | Shea Brandon Buhler | — | (209) 338 7595 | GC, remodel, ADU | Arnold · Calaveras County | — | — |
| The Man Roofing Repair & Consultation | David Michael Naiditch | — | (916) 224 2003 | Other roofers | Valley Springs · Calaveras County | — | — |
| The Rodr Company | Rodney James Ii Rodr | — | (209) 404 7648 | GC, remodel, ADU | Arnold · Calaveras County | — | — |