| Renaissance Construction | Ron Henry Letourneau | — | (207) 504 0271 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Rendered Stone Landscapes | John Paul Piccirillo | — | (510) 309 6886 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Renderos Plumbing | Jaime Dominguez Renderos | — | (510) 684 8554 | Other | Oakland · Alameda County | — | — |
| Rene Pool Services INC | Rene Alexander Jr Cuevas | — | (510) 453 4229 | Pool | Newark · Alameda County | — | — |
| Renewal By Andersen Of San Francisco | Charles Howard Gindele | — | (866) 420 4109 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Renovations Plus | Renovations Plus | — | (510) 828 4314 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Renovations Reimagined | Damon Bernard Cox | — | (510) 651 8511 | Other | Fremont · Alameda County | — | — |
| Rental Property Maintenance Contractors | Michelle Lynn Cowley | — | (925) 400 9870 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Repcold Distributors | Brian David Wood | — | (510) 498 8786 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Residential Management Services | Pierre Junior Pham | — | (510) 823 5358 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Residential Restoration Co | Brock Reid Jr Settlemier | interested@domainmarket.com | (510) 339 9905 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Restec Contractors INC | James Richard Kasella | — | (510) 732 1996 | Other roofers | Hayward · Alameda County | — | — |
| Restoration Builders INC | Jon Philip Koski | — | (510) 732 6655 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Restoration Management Company | Jon Kazuto Takata | — | (800) 400 5058 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Restorcap LLC | Tarmo Peter Pajutee | info@restorcap.com | (503) 326 7131 | Other | Oakland · Alameda County | — | — |
| Reunion Creative INC | Eran Eli Dayan | info@reunioncreative.com | (510) 504 3726 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Revery Design Build | Revery Design Build | — | (925) 989 7167 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Revitalize Bay Area Builder | Yousefian Arjmand | — | (510) 434 4219 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Rex Water Removal | Virgil Lee Iv Noel | — | (408) 826 2029 | Other | Livermore · Alameda County | — | — |
| Reyes Glass | Reyes Glass | — | (510) 388 4314 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Reynolds Painting | Reynolds Painting | jason@reynolds-painting.com | (510) 912 2942 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Reynoso Tree Care | Reynoso Tree Care | reynosotreecare@gmail.com | (510) 455 6336 | Tree | Union City · Alameda County | — | — |
| Rezcon | Zarnegar Reza | — | (510) 269 1384 | Other | Oakland · Alameda County | — | — |
| Rezucha Paul General Contractor | Rezucha Paul General Contractor | — | (510) 244 9873 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Rf Macdonald Co LLC | Holdco INC Rfmco | — | (650) 529 3060 | HVAC | Hayward · Alameda County | — | — |
| Rfc Wireless INC | Eugene Preston Powell | — | (925) 244 1853 | Other | Fremont · Alameda County | — | — |
| Rg Construction | Gomez Morado Rene | — | (510) 755 1898 | GC, remodel, ADU | San Lorenzo · Alameda County | — | — |
| Rg Painting | Rg Painting | roy@rg-painting.com | (510) 909-8758 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Rh Fine Cabinetry LLC | Raul Hernandez Equihua | — | (925) 961 7559 | Other | Livermore · Alameda County | — | — |
| Rh Mechanical LLC | Ronald Leo Iii Hahlbeck | — | (925) 667 7239 | HVAC | Livermore · Alameda County | — | — |
| Rhino Flooring | Rhino Flooring | — | (415) 515 9387 | Other | Oakland · Alameda County | — | — |
| Ric Kitchen + Bath Showroom | Ric Kitchen + Bath Showroom | — | (510) 733 5543 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Rich's Drywall | Rich's Drywall | — | (925) 784 4500 | Other | Livermore · Alameda County | — | — |
| Rich's Quality Painting & Construction | Richard James Amato | — | (510) 410 3023 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Richard Anderson Elliott | Richard Anderson Elliott | — | (925) 548 1617 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Richard Bangert Painting | Richard Bangert Painting | — | (510) 459 4549 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Richard Ditiberio & Co | Richard Joseph Di Tiberio | — | (510) 581 8492 | Windows, patio, painters | Castro Valley · Alameda County | — | — |
| Richard F Trevino Jr | Richard F Trevino Jr | — | (510) 566 9501 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Richard James Foley | Richard James Foley | — | (925) 858 0602 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Richard N Pukatch DBA Alvarado Construction Co | Richard Nicholas Pukatch | — | (510) 625 8000 | GC, remodel, ADU | Oakland · Alameda County | — | — |