| Stage 7 INC | Ever Enrique Ochoa | — | (510) 575 9902 | Other | Union City · Alameda County | — | — |
| Stahlschmidt Painting & Restoration LLC | Hans Jorg Franz Stahlschmidt | — | (510) 848 4040 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Stanley Sound | Stanley Sound | — | (510) 703 5082 | Electricians | Castro Valley · Alameda County | — | — |
| Stanton Electric | Terrence Elias Sahadi | quote@stanton-electric.com | (510) 512 3483 | Electricians | Alameda · Alameda County | — | — |
| Star Electricals LLC | Singh Gurdeep | — | (510) 557 8487 | Electricians | Union City · Alameda County | — | — |
| Star Hardwood Floor Services | Nghia Tuan Huynh | — | (510) 759 2433 | Other | Castro Valley · Alameda County | — | — |
| Star Plumbing & Water Heater | Star Plumbing & Water Heater | — | (510) 833 8801 | Other | Dublin · Alameda County | — | — |
| Star Rooter & Plumbing | Star Rooter & Plumbing | — | (510) 481 1555 | Other | San Lorenzo · Alameda County | — | — |
| Star Rooter And Plumbing INC | Juan Francisco Coronado | — | (510) 481 1555 | Other | San Lorenzo · Alameda County | — | — |
| Starblindz INC | Satinder Joshi | — | (510) 361 6235 | Other | Union City · Alameda County | — | — |
| Stark Construction | Eric Alexander Stark | proteam@mopro.com | (415) 407 4637 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Starlight Marble & Granite | Starlight Marble & Granite | — | (925) 447 0579 | Other | Livermore · Alameda County | — | — |
| Starlite Glass & Mirror | Starlite Glass & Mirror | — | (510) 593 9384 | Windows, patio, painters | Dublin · Alameda County | — | — |
| Start 2 Finish Construction | Torres Rosales Victorino | — | (650) 520 5231 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Stasis Building | Roy Gary Black | — | (510) 735 9801 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| State Roofing Systems INC | Keith Carl Symons | — | (510) 317 1477 | Other roofers | San Leandro · Alameda County | — | — |
| Statewide Systems INC | Calvin Bodily Clark | — | (510) 690 0006 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Steadfast Construction Services INC | Eric Oakes Pestana | — | (925) 984 4381 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Steele & Stone | Stacey Ellen Steele | — | (510) 955 7734 | Other | Oakland · Alameda County | — | — |
| Stefan Walters | Stefan Walters | stefan@stefanwalters.com | (510) 384 2687 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Stela Landscaping | Stela Landscaping | dave@lab6.com | (510) 567 3568 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Stellalux Construction | Bryan Douglas Moore | bryan@stellaluxconstruction.com | (510) 601 1167 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Stellar Bg INC | Larry James Kudsk | hi@mystore.com | (510) 344 6356 | Other roofers | Oakland · Alameda County | — | — |
| Step By Step Contractor INC | Askhat Nsangaliyev | — | (510) 203 8762 | Electricians | Fremont · Alameda County | — | — |
| Stephen Trettin | Stephen Trettin | — | (510) 585 7877 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Stepko Tile INC | Dmukhovskiy Stepan | — | (650) 438 5860 | Other | Castro Valley · Alameda County | — | — |
| Sterling Environmental Corporation | Jose Luis Rico Gutierrez | sterling@sterlingenvironmental.com | (510) 638 2800 | Other | San Leandro · Alameda County | — | — |
| Sterling Lusk General Contracting | Sterling James Lusk | — | (510) 750 6753 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Steve Ewbank Manufactured Homes | Steve Ewbank Manufactured Homes | — | (408) 690 5092 | Other | Livermore · Alameda County | — | — |
| Steve Height Parking Services | Stephen Robert Height | — | (415) 748 2997 | Other | Berkeley · Alameda County | — | — |
| Steve Lipton Plumbing | Steve Lipton Plumbing | — | (510) 316 4765 | Other | Oakland · Alameda County | — | — |
| Steve Simoni | Steve Simoni | — | (925) 443 7085 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Steve Wong | Steve Wong | interested@domainmarket.com | (408) 893 0546 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Steve's Tile And Construction Co | Ivanovic Slavoljub | — | (510) 623 9441 | Electricians | Fremont · Alameda County | — | — |
| Steven A Morsilli | Steven A Morsilli | — | (925) 336 0427 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Steven L Phillips Construction INC DBA Phillips Construction | Steven Loyal Phillips | — | (510) 886 2378 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Steven L Richards | Steven L Richards | help@smugmug.com | (510) 793 6141 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Steven M Stern DBA Steve's Property Services Electrical Division | Steven Michael Stern | — | (510) 427 3111 | Electricians | San Leandro · Alameda County | — | — |
| Steven Mai Landscaping | Steven Mai Landscaping | — | (510) 381 3773 | Windows, patio, painters | San Lorenzo · Alameda County | — | — |
| Stich Construction INC | Rocky Jack Gregg Stich | — | (415) 310 1355 | GC, remodel, ADU | Newark · Alameda County | — | — |