| Sun Valley Carpets | Sun Valley Carpets | — | (707) 486 5590 | Other | Concord · Contra Costa County | — | — |
| Sunbusters Patio Cover Company INC | Alan Mathew Lee | — | (925) 625 0120 | Electricians | Brentwood · Contra Costa County | — | — |
| Suncoast Awning LLC | Robert Elwood Hansel | — | (707) 712 6658 | Other | Martinez · Contra Costa County | — | — |
| Suncrest Homes INC | Anthony Peter De Mattei | — | (925) 706 7887 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Sung Tae Pak | Sung Tae Pak | — | (925) 475 9788 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Sunia Construction INC | Christopher James Sunia | — | (925) 822 2615 | HVAC | Concord · Contra Costa County | — | — |
| Sunrise Grading & Paving | Sunrise Grading & Paving | — | (925) 513 7373 | Other | Brentwood · Contra Costa County | — | — |
| Sunrise Vine View LLC | Michael Kenneth Murray | — | (925) 326 1299 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Sunset Development Company | Alexander Rafahi Jr Mehran | — | (925) 866 0100 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Sunset Flooring | Sunset Flooring | sunsetqcs@yahoo.com | (310) 908-7020 | Other | Antioch · Contra Costa County | — | — |
| Sunset Painting | Sunset Painting | — | (925) 325 7482 | Windows, patio, painters | Antioch · Contra Costa County | — | — |
| Sunset Painting | Sunset Painting | — | (925) 487 3085 | Windows, patio, painters | San Ramon · Contra Costa County | — | — |
| Sunset Tile And Stone | Joseph Michael Garcia | — | (925) 997 7465 | Other | Pleasant Hill · Contra Costa County | — | — |
| Sunshine Floors LLC | Dwayne Kaukale Bal | — | (510) 223 4300 | Other | El Sobrante · Contra Costa County | — | — |
| Sunshine Gutters And Roofing INC | Nadav Marciano | — | (510) 525 0880 | Other roofers | El Cerrito · Contra Costa County | — | — |
| Sunview Landscape | Sunview Landscape | — | (925) 833 0661 | Windows, patio, painters | San Ramon · Contra Costa County | — | — |
| Sup Air Man Cooling And Heating | Jon Gabriel Gonsalves | — | (925) 772 0538 | HVAC | Oakley · Contra Costa County | — | — |
| Super Buffalo Wrecking Services | Sergio Borges Guimaraes | — | (510) 253 6548 | Other | Richmond · Contra Costa County | — | — |
| Super Cool Mechanical INC | Lionel Walter Iii Richards | — | (415) 342 2033 | HVAC | Alamo · Contra Costa County | — | — |
| Super Savers Plumbing And Rooter | Super Savers Plumbing And Rooter | — | (925) 755 6416 | Other | Antioch · Contra Costa County | — | — |
| Superior Construction & Renovation | Keshavarz Fard Mohammadali | superiorconstructionrenovation@gmail.com | (925) 360 4956 | Electricians | Martinez · Contra Costa County | — | — |
| Superior Door INC | Deborah Ann Diaz | — | (925) 260 4260 | Other | Brentwood · Contra Costa County | — | — |
| Superior Electrical Construction | Michael David Henry | — | (925) 595 4895 | Electricians | Concord · Contra Costa County | — | — |
| Superior Fence & Rail Sf East Bay | Paul Clinton Campbell | — | (925) 354 7955 | Other | Walnut Creek · Contra Costa County | — | — |
| Superior Fence And Rail-sacramento | George Aristotle Arrospide | — | (408) 607 4750 | Other | Concord · Contra Costa County | — | — |
| Superior Floors Ftc LLC | Thomas Allen Chatham | superiorfloorsftc@gmail.com | (925) 755 3077 | Other | Antioch · Contra Costa County | — | — |
| Superior Plumbing & Drain Cleaning Services | Ricardo Lopez Bonilla | — | (510) 222 7608 | Other | Richmond · Contra Costa County | — | — |
| Superior Roofing | Chavarria Rodolfo | bids@superiorroofing.com | (510) 541 1381 | Other roofers | Pittsburg · Contra Costa County | — | — |
| Superior Security Systems INC | Richard| Marchi Tiello Rick Marchitiello | — | (510) 758 8531 | Electricians | El Sobrante · Contra Costa County | — | — |
| Superior Wallcovering | Superior Wallcovering | — | (925) 360 1976 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Superior Window Works | Miguel Ramirez Gomez | — | (925) 413 9235 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Surface Resolutions LLC | Brandie Marie Cichosz | — | (925) 308 3480 | Other | Oakley · Contra Costa County | — | — |
| Sustainable Group INC | Roger Neal Wykle | — | (925) 899 9721 | Other | Moraga · Contra Costa County | — | — |
| Sut's Superior Underground Tank Service INC | John Walker Sutfin | — | (925) 551 7887 | GC, remodel, ADU | San Ramon · Contra Costa County | — | — |
| Sva Construction INC | Daniel Victor Austi | info@svaconstruction.com | (925) 214 6731 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Svetlozar Kostadinov Benchev | Svetlozar Kostadinov Benchev | — | (925) 683 9110 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Swan Pools | Robert Leon Vennes | — | (925) 934 7926 | Windows, patio, painters | Walnut Creek · Contra Costa County | — | — |
| Swank Electric | Robert Stephen Pancoast | — | (925) 330 5607 | Electricians | Lafayette · Contra Costa County | — | — |
| Sweet Water Landscaping | Sweet Water Landscaping | — | (925) 222 9375 | Windows, patio, painters | Martinez · Contra Costa County | — | — |
| Swenson Property Management | Swenson Property Management | admin@swensonpm.com | (925) 918-2324 | Property managers | San Ramon · Contra Costa County | — | — |