| Rmc Painting & Decorating INC | Mireles Ruben | — | (510) 570 7083 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Rmg Roofing | Juan Ramon Maldonado Torres | — | (510) 342 6662 | Other roofers | Union City · Alameda County | — | — |
| Rmm Roofing INC | Rangel Homero Mendoza Montejo | — | (510) 938 0628 | Other roofers | Oakland · Alameda County | — | — |
| Rnr General Engineering | Nanez Roberto | — | (925) 718 5170 | Other | Hayward · Alameda County | — | — |
| Rns Plumbing & Backflow LLC | Ryan David Branco | — | (925) 315 0697 | Other | Livermore · Alameda County | — | — |
| Roadrunner Glass Door INC | James Scott Carnathan | — | (510) 792 5347 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Rob's Painting | Rob's Painting | — | (510) 862 0968 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Roberson Construction | William V Roberson | — | (510) 915 0820 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Robert A Tucknott & Associates INC | Robert Allen Tucknott | — | (925) 931 0800 | Electricians | Livermore · Alameda County | — | — |
| Robert Bowers Construction | Robert Duane Bowers | — | (925) 980 8793 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Robert Deen Construction | Robert Reynolds Jr Deen | — | (510) 247 0504 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Robert Fazzio Construction | Robert Donald Fazzio | — | (510) 909 3667 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Robert Henry Evans | Robert Henry Evans | — | (415) 609 8814 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Robert J Simmons Engineering & General Contractor | Robert Joe Simmons | — | (650) 444 4440 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Robert James Cortez | Robert James Cortez | — | (925) 455 0720 | HVAC | Livermore · Alameda County | — | — |
| Robert P Chrisp | Robert P Chrisp | — | (510) 656 2840 | Other | Fremont · Alameda County | — | — |
| Robert Payne Construction INC | Robert Jeffery Payne | — | (408) 593 0042 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Robert Q Le | Robert Q Le | — | (408) 888 9829 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Roberto's Painting Co | Armendariz-o Roberto | — | (510) 590 1113 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Roberts Electric Co INC | Daniel Scott Pitcock | — | (510) 834 6161 | Electricians | Oakland · Alameda County | — | — |
| Robinson Construction | Scott William Robinson | bill@robinson-construction.com | (805) 258-1646 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Robles Communications INC | Louie Roman Robles | — | (510) 351 8800 | Other | San Leandro · Alameda County | — | — |
| Robles Electric | Victor Manuel Robles | — | (510) 590 1223 | Electricians | Alameda · Alameda County | — | — |
| Roca Construction | Rodriguez Daniel | — | (510) 500 2354 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rocha Electrical Systems | Rocha Marcos | — | (415) 637 1021 | Electricians | Hayward · Alameda County | — | — |
| Rock Construction | Singh Amandeep | cclancy@rockconstruction.com | (510) 709 5326 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Rock Solid INC | Theodore J Fitch | — | (925) 999 9119 | Other | Dublin · Alameda County | — | — |
| Rock The Walls Drywall | Kristi Lynn Atwood | — | (510) 881 6071 | Other | Hayward · Alameda County | — | — |
| Rockridge Builders | Rockridge Builders | billhinkamp@rockridgebuilders.com | (510) 535 1682 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rocky's Plumbing And Rooter | Karmonte Jabbar Reid | — | (415) 802 3391 | Other | Newark · Alameda County | — | — |
| Rod & Wes Clark's Roofing Company | Wesley Paul Clark | — | (925) 337 0097 | Other roofers | Livermore · Alameda County | — | — |
| Rod Heisler Construction & Management INC | Roderick Allen Heisler | — | (415) 741 3535 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rodan Builders INC | Ted William Forseth | — | (650) 508 1700 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Rodan Construction Company | Danilo Raviz Zenarosa | — | (510) 468 7980 | GC, remodel, ADU | Union City · Alameda County | — | — |
| Rodan Oc Jones A Joint Venture | C Jones & Sons INC O | — | (510) 526 3424 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Rodenburg Construction Co | William Tinus Cory Rodenburg | — | (510) 333 1978 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Rodney Fite | Rodney Fite | — | (510) 472 6602 | Electricians | San Lorenzo · Alameda County | — | — |
| Rodolfo A Arias | Rodolfo A Arias | — | (510) 228 6673 | Other roofers | Oakland · Alameda County | — | — |
| Rodrigo M Jacomet | Rodrigo M Jacomet | — | (310) 228 8917 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rodrigues Tile Company | Kenneth Jay Rodrigues | — | (510) 490 6995 | Other | Fremont · Alameda County | — | — |