| Rapid-repair Plumbing Services | Fazelrahman Faizy | — | (510) 856 7982 | Other | Hayward · Alameda County | — | — |
| Raposo Engineering INC | Mark Anthony Raposo | — | (650) 622 6152 | Other | Hayward · Alameda County | — | — |
| Ratcliff Construction | Thomas Trueblood Ratcliff | — | (510) 376 8500 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Raul Construction | Raul Eduardo Poco | — | (510) 677 8538 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Rav Mechanical Corporation | Vimlesh Parneal Nand | — | (510) 461 2322 | HVAC | Hayward · Alameda County | — | — |
| Ravi Randhawa | Ravi Randhawa | — | (650) 741 5276 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Ray Construction & Developement Corporation | Danny Paul Ray | — | (408) 309 1400 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Ray Tech Professional Painting | Ray Tech Professional Painting | — | (925) 606 0512 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Ray's Electric | Gregory Elwood Gruendl | — | (510) 577 7700 | Electricians | Oakland · Alameda County | — | — |
| Ray's Electric | Raymond Mark Tse | — | (510) 663 7279 | Electricians | Oakland · Alameda County | — | — |
| Ray's Straight Line Painting INC | Ray Charles Jr Fuller | — | (510) 472 5454 | Windows, patio, painters | Hayward · Alameda County | — | — |
| Rayco Construction Services INC | Scott Dale Henderson | — | (510) 538 3667 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Rayco Painting & Construction INC | Michael Bryan Rizarri | — | (888) 320 7566 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Raygen Construction | Zegu Liu | — | (650) 999 4666 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Raymond A George | Raymond A George | — | (925) 337 7500 | Other | Livermore · Alameda County | — | — |
| Raymond Construction | Yuren Liu | — | (510) 472 5588 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Raymond Handling Concepts Corporation | Jaime Joseph Saenz | — | (562) 944 8067 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Raymond L Ward Ii | Raymond L Ward Ii | — | (925) 209 4337 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Raymond Wong Construction INC | Raymond Lee Wong | — | (510) 657 1999 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Raymundo F Reyes | Raymundo F Reyes | — | (510) 376 6805 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Rays Service One Plumbing | Braggs Raymond | — | (510) 677 4690 | Other | Oakland · Alameda County | — | — |
| Raza Handyman Services & Home Improvement INC | Sayed Zakaria Hussain | — | (510) 300 4166 | Electricians | Hayward · Alameda County | — | — |
| Razor Construction INC | Delgado Jahaziel Navarro | ebasmetal@icloud.com | (310) 345 6701 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Rbac Builders INC | Elvin Manuel Castillo | info@rbacbuilders.com | (510) 331 6921 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Rc Building Renovations | Rc Building Renovations | — | (408) 590 8987 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Rc Residential Construction INC | Michael Stanton Riter | — | (415) 515 6625 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Rcm Electric | Rafael Carbajal Martinez | — | (650) 892 7589 | Electricians | Hayward · Alameda County | — | — |
| Rdk Hardwood Flooring | Rdk Hardwood Flooring | — | (510) 376 5542 | Other | Hayward · Alameda County | — | — |
| Re Development Group INC | Jonathan Teames | interested@domainmarket.com | (925) 826 4344 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Reading Construction | Michael Grant Reading | — | (510) 410 8138 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Ready Hoist | Travis Joe Simmons | — | (650) 444 4460 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Ready2servehandyman LLC | Edwin Gotay Betancourt | — | (510) 326 1720 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Real Electrical Services | Aamir Mateen Al-musawwir | — | (415) 240 6728 | Electricians | Oakland · Alameda County | — | — |
| Real Garage Doors | Real Garage Doors | — | (510) 943-2590 | Other | Newark · Alameda County | — | — |
| Real Protection Incorporated | Christopher William Seiden | — | (510) 909 3459 | Electricians | Pleasanton · Alameda County | — | — |
| Rebarber Enterprises | John Anthony Shillingsburg | — | (650) 266 4580 | Other | Hayward · Alameda County | — | — |
| Rebuild Better Home Construction INC | Man Li Zeng | — | (510) 928 3280 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rebuilding Together East Bay Network | Tracey Maurice Greenwell | — | (510) 644 8979 | Electricians | Berkeley · Alameda County | — | — |
| Recal Steel INC | Gene Brian Champion | — | (925) 201 1571 | Other | Pleasanton · Alameda County | — | — |
| Recinos Restoration & Construction | Raul Ezequiel Recinos | — | (510) 269 3401 | GC, remodel, ADU | San Leandro · Alameda County | — | — |