| Sticks And Stones INC | Georg Buechi | — | (510) 847 2491 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Still On The Road Ac/dc Automatic Gates INC | Ponce Santiago Soria | — | (510) 472 0587 | Other | Oakland · Alameda County | — | — |
| Stine Builders | Stine Builders | chuck@stinebuilders.com | (510) 910 5469 | HVAC | Oakland · Alameda County | — | — |
| Stingray Security Systems INC | Randal Edward Gomez | — | (510) 352 9878 | Electricians | Hayward · Alameda County | — | — |
| Stochl Landscape Services INC | Stephen Matthew Stochl | — | (650) 440 4022 | Windows, patio, painters | Newark · Alameda County | — | — |
| Stomper Company INC | Gary Michael Rose | — | (510) 574 0570 | Other | Hayward · Alameda County | — | — |
| Stone City Corp | Liang Jun Li | — | (510) 219 3632 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Stone Empire Fabrication | Stone Empire Fabrication | — | (510) 878 1076 | Other | San Leandro · Alameda County | — | — |
| Stone Home Building INC | Ryan William Stone | — | (510) 559 0678 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Stone Style INC | Carmelo Amore | — | (510) 527 1370 | Other | Albany · Alameda County | — | — |
| Stonehaus Builders | Brian John Bohne | — | (510) 406 9484 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Stralka Construction | Michael Albert Stralka | — | (510) 207 4832 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Strand Stone | Strand Stone | stvstrnd@gmail.com | (650) 766 3049 | Other | Oakland · Alameda County | — | — |
| Stratton Plumbing INC | David Michael Forsyth | — | (925) 588 9627 | Other | Emeryville · Alameda County | — | — |
| Straus Carpet Co | Thomas Eugene Straus | — | (510) 428 2828 | Other | Oakland · Alameda County | — | — |
| Straw Hat Electric INC | Trung Duc Nguyen | — | (510) 995 6602 | Electricians | Alameda · Alameda County | — | — |
| Streamline Plumbing & Drain Co | Gregory Allen Martin | — | (510) 481 0380 | Other | Castro Valley · Alameda County | — | — |
| Streamline Power | Streamline Power | — | (510) 673 8740 | HVAC | Livermore · Alameda County | — | — |
| Streivor INC | Jeffrey Scott Lambertson | info@streivor.com | (925) 960 9090 | Other | Livermore · Alameda County | — | — |
| Striking Iron Works | Striking Iron Works | — | (925) 337 1853 | Other | Oakland · Alameda County | — | — |
| Strong Built Construction | Andrew Joseph Lombardi | — | (925) 519 9948 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Stronger Building Services | Claudia Lizeth Carrasco | — | (510) 487 8363 | Other roofers | San Leandro · Alameda County | — | — |
| Structure Ii Design | Structure Ii Design | — | (510) 366 0663 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Structure Net INC | Mustafa Ali | — | (925) 292 9494 | Other | Livermore · Alameda County | — | — |
| Studio Sa Design Build | Summer Marie Frisby | — | (619) 490 9724 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Studio Simo | Bennani Mohamed | paghe.simo@gamil.com | (919) 450 8711 | GC, remodel, ADU | Piedmont · Alameda County | — | — |
| Studio Z Design & Construction | Tom Edward Zakim | — | (510) 420 8909 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Stumpy's Tree Service | Glenn Michel Lopez | — | (925) 518 1442 | Tree | Livermore · Alameda County | — | — |
| Style Painting | Style Painting | interested@domainmarket.com | (650) 388 8577 | Windows, patio, painters | Newark · Alameda County | — | — |
| Su Construction Studio INC | Weiping Su | — | (510) 851 2090 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Suarez & Munoz Construction INC | John Paul Suarez | — | (510) 782 6065 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Suarez Floor Covering INC | Diaz Brandon Suarez | — | (510) 461 3875 | Other | Hayward · Alameda County | — | — |
| Sublime Woodworking LLC | Wilson Andrew | — | (510) 623 1307 | Other | Fremont · Alameda County | — | — |
| Success Plumbing Co | Tsz Yeung Wong | — | (510) 352 2369 | Other | San Leandro · Alameda County | — | — |
| Successful Construction INC | Jun Wei Hu | — | (510) 552 0058 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Suda Construction | Michael Arnold Suda | — | (510) 332 4452 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Suf Construction Co | Fizbakhsh Changiz | — | (510) 919 2146 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Sullivan Waterworks INC | Sean Patrick Sullivan | sean@sullivanwaterworks.com | (415) 420 1481 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Sultan Construction | Richard Martin Sultan | official@sultan-construction.com | (510) 295 8158 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Suma Landscaping INC | Susan Jeanne| Frank-gross Susan Jeanne Frank | info@sumalandscaping.com | (510) 261 3585 | Windows, patio, painters | Alameda · Alameda County | — | — |