| Sunvault | Sameer Shafique Sayed | — | (510) 399 3632 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Super Mario Glass INC | Mario Rodriguez Ibarra | — | (510) 324 8798 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Superb On Time Construction INC | Vishesh Shrikumar Nair | vic.vic148@gmail.com | (408) 836 2175 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Superconstructors INC | James Alfred Jr Thornton | — | (510) 479 4929 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Superior Automatic Sprinkler Co | Peter J Hulin | — | (408) 946 7272 | Other | Fremont · Alameda County | — | — |
| Superior Builders & Remodelers | David Lee Lorber | — | (510) 658 7252 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Superior Construction Master INC | Wai Ting Siu | — | (510) 895 8182 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Superior Construction Services | Steven Alan Coffin | — | (925) 963 2169 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Superior Electric INC | Christopher Dean Roark | info@superior-electric.com | (925) 485 4460 | Electricians | Pleasanton · Alameda County | — | — |
| Superior Home Construction | Song Yongan | — | (510) 401 7586 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Superior Interiors | Superior Interiors | — | (510) 366 2015 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Superior Kitchen Specialists INC | Hao Jie Tan | — | (510) 406 8619 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Superior Legend Construction | Li H Chen | — | (510) 898 8898 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Superior Mechanical Services INC | Edward Joseph Enos | — | (925) 456 3200 | HVAC | Livermore · Alameda County | — | — |
| Superior Plastering | Superior Plastering | — | (510) 270 6968 | Other | Oakland · Alameda County | — | — |
| Superior Tile & Stone | Maria Concepcion Delgado | inquiries@superiortilestone.com | (510) 895 2700 | Other | Hayward · Alameda County | — | — |
| Superior Window Tinting | Superior Window Tinting | — | (510) 888 0480 | Other | Hayward · Alameda County | — | — |
| Supreme Climate Control | Supreme Climate Control | sicchvac@gmail.com | (800) 939 1803 | HVAC | Oakland · Alameda County | — | — |
| Sure Fire Protection Company Incorporated | Charles Frederick Quickert | — | (510) 490 7873 | Other | Fremont · Alameda County | — | — |
| Surfside Renovations | Surfside Renovations | — | (510) 679 4070 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Surgeflow Plumbing LLC | Juan Adrian Garcia | juan@surgeflow-plumbing.com | (510) 467 8836 | Other | Hayward · Alameda County | — | — |
| Sustain With Me Landscapes LLC | Amelia Rose Greenland | — | (805) 680 3818 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Sustainable Buildings System INC | Liang H Phua | — | (510) 839 8886 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Sustainable Technologies | Sustainable Technologies | prashant.wakare@sustainable-technologies.com | (510) 523 1122 | Electricians | Oakland · Alameda County | — | — |
| Sustainable Urban Neighborhoods | James Wesley Moore | jmoore@sustainablehoods.com | (510) 655 6750 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Sutorik & Company | George Edward Sutorik | — | (510) 655 3677 | Electricians | Berkeley · Alameda County | — | — |
| Sw Builder Pro | Gomez Vizcarra Sergio | — | (650) 218 7883 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Sw Custom Cabinets INC | Steven Francis Waybright | — | (925) 872 0105 | Other | Livermore · Alameda County | — | — |
| Swan Building And Design | Swan Building And Design | — | (510) 410 1650 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Swanson Construction INC | Matthew Sean Swanson | — | (408) 600 6453 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Swanson Landscaping INC | Michelle Lee Swanson | swansonslandscapinginc@gmail.com | (925) 238-9144 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Swaran Construction | Singh Swaran | — | (510) 579 3476 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Swarts Builders INC | Mark Edward Swarts | — | (510) 409 0149 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Swedish Quality Works | Swedish Quality Works | — | (510) 865 0440 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Sweet Spring Construction | Wen Hangjian | — | (925) 351 3123 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Sweitzer INC | Conor Farrell Sweitzer | firstname@sweitzer.com | (650) 930 0775 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Swh A Jv | And Witbeck INC Stacy | — | (510) 748 1870 | Other | Alameda · Alameda County | — | — |
| Swift Heating & Air | Aaron Donald Whitehead | — | (925) 413 4851 | HVAC | Livermore · Alameda County | — | — |
| Swift Lift Flooring Service INC | Robert Douglas Adamson | — | (925) 872 0454 | Other | Fremont · Alameda County | — | — |
| Swinderman Construction INC | Brian Keith Swinderman | — | (510) 577 0770 | GC, remodel, ADU | Oakland · Alameda County | — | — |