| Russell Construction Services | Ian James Russell | — | (925) 321 3325 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Russell Electric Corporation | Mason Colin Russell | eben@eyebytes.com | (510) 303 0067 | Electricians | Castro Valley · Alameda County | — | — |
| Russo Enterprise | Russo Enterprise | — | (925) 759 0467 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Russo Glass Co | Dennis Dean Di Vita | — | (510) 533 7400 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Rvh Construction | Rosalio Haro-Flores | — | (510) 706 1215 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Ryan & Campbell Construction | Charles John Campbell | — | (510) 612 3099 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Ryan Brothers Construction | Thomas Patrick Ryan | — | (510) 292 5601 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Ryan Christopher Schletter | Ryan Christopher Schletter | — | (650) 207 7540 | HVAC | Hayward · Alameda County | — | — |
| Ryan Cummings | Ryan Cummings | — | (510) 282 3521 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Ryan Fay Builder | Kathleen Anne Marquis | — | (650) 743 0939 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Ryan Phelps Construction | Ryan Christopher Phelps | — | (510) 909 3901 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Ryan Stewart Communications | Ryan Stewart Communications | — | (925) 487 4756 | Other | Livermore · Alameda County | — | — |
| Ryan Warcken Construction | Ryan Nicholas Warcken | — | (831) 917 7080 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Ryno Drywall | Ryno Drywall | emailinfo@rynodrywall.com | (510) 292 3534 | Other | Hayward · Alameda County | — | — |
| Rywen Insulation INC | Roni Alexander Galicia Figueroa | — | (341) 400 8501 | Other | San Leandro · Alameda County | — | — |
| S & C Enterprises | Dennis Arthur Stopper | — | (415) 987 5678 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| S & S Builder INC | David Jian Yuan | — | (510) 508 9371 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| S & S Painting And Coatings INC | Gregory Dean Severs | — | (510) 635 3030 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| S & S Trucking | Steven Jeffrey Navarro | — | (510) 383 3556 | Other | Oakland · Alameda County | — | — |
| S & Y Corporation | Young Ho Ko | — | (510) 792 6751 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| S A G Construction | Arce Gandara Salvador | — | (510) 387 0669 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| S A H Glass & Mirror Company | Steven Arnold Hernandez | — | (925) 518 6978 | Windows, patio, painters | Dublin · Alameda County | — | — |
| S B C Silveira Built Customs LLC | Scott Elliot Silveira | — | (925) 822 8456 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| S B Construction | Bobrovitch Yuval | — | (917) 881 7444 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| S D Ceesay Painting | S D Ceesay Painting | — | (415) 845 1712 | Windows, patio, painters | Oakland · Alameda County | — | — |
| S D R Construction | Scott Davis Riley | — | (510) 499 6392 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| S D V Services INC | Victor Lawrence Rollandi | — | (510) 521 8170 | Other | Alameda · Alameda County | — | — |
| S Espinoza Painting | S Espinoza Painting | — | (510) 526 6101 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| S H K Construction INC | Evan Hsen | — | (408) 892 0032 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| S K Contracts INC | Steven Tabrett | info@skcontracts.co.uk | (925) 455 4201 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| S M I Construction INC | Can Hoa Ly | — | (510) 351 3288 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| S N Building | Andy Huy Kien Phung | — | (510) 507 0902 | Electricians | San Leandro · Alameda County | — | — |
| S N Electric | Soo Hyun Nam | — | (510) 846 0675 | Electricians | Alameda · Alameda County | — | — |
| S P G Landscaping INC | Carlos Iniguez-Vasquez | hello@spglandscaping.com | (510) 387 4857 | Windows, patio, painters | Oakland · Alameda County | — | — |
| S R Blackstone Construction INC | Steven Richard Blackstone | — | (510) 593 8817 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| S R Construction | Paul Stuart Reinsch | — | (510) 848 2359 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| S R Painting INC | Steve Michael Roney | — | (925) 461 0516 | Windows, patio, painters | Pleasanton · Alameda County | — | — |
| S V B Construction Co INC | Balajidas Mushyam | — | (925) 956 9912 | Other roofers | Dublin · Alameda County | — | — |
| S Walt Construction | Seth Walter Meranda | — | (510) 363 5740 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| S&a Built LLC | Seyed Roohollah Hosseini | tanner@sabuilt.com | (510) 513 1446 | GC, remodel, ADU | Fremont · Alameda County | — | — |