| Richard Peter Arrighi Construction | Richard Peter Arrighi | — | (510) 290 2390 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Richard Rodgers Construction | Richard Paul Rodgers | — | (510) 258 9793 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Richard's Heating & Air Repair INC | Richard Jerome Westwood | — | (925) 946 9397 | HVAC | Livermore · Alameda County | — | — |
| Richards Best Builder | Richards Best Builder | — | (510) 318 2463 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Richardson Construction | Howard Ray Richardson | info@richdirt.com | (925) 565 0397 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Richardson's Quality Construction | Jackie Lee Jr Richardson | — | (510) 414 4153 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Rick Hoffmann Services INC | Richard Dean Hoffmann | — | (510) 372 4803 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Rick's Glass On Wheels | Ricky Ormar Jr Mccullough | — | (341) 766 8377 | Windows, patio, painters | Berkeley · Alameda County | — | — |
| Rick's Hauling | Rick's Hauling | — | (925) 309 9567 | Other | Berkeley · Alameda County | — | — |
| Rick's Heating And Air Conditioning | Rick's Heating And Air Conditioning | — | (925) 931 9382 | HVAC | Pleasanton · Alameda County | — | — |
| Rick's Plumbing | Rick's Plumbing | — | (510) 830 7624 | Other | Alameda · Alameda County | — | — |
| Ricks Enterprise Electric | Rickey Renaud Dunbar | — | (510) 712 7242 | Electricians | Oakland · Alameda County | — | — |
| Ricky Koopen Painting | Ricky Koopen Painting | — | (323) 606 1539 | Windows, patio, painters | Alameda · Alameda County | — | — |
| Ridgecrest Construction & Remodel Design | Henry Joseph Batteate | — | (925) 784 2798 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Ridgeway Finishing Systems INC | Mehtab Singh Gill | — | (888) 829 2754 | Electricians | Hayward · Alameda County | — | — |
| Ridout Roofing Company INC | Katherine Ann Ridout | — | (510) 351 1922 | Other roofers | San Leandro · Alameda County | — | — |
| Rielsan General Building And Maintenance INC | Alvaro Casillas Vargas | — | (510) 512 3170 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Riff Raff Plumbing | Riff Raff Plumbing | — | (415) 706 6112 | Other | Oakland · Alameda County | — | — |
| Right Connection The | Right Connection The | — | (510) 919 4399 | Electricians | Albany · Alameda County | — | — |
| Right Renovations | Valerie Kay Keith | — | (510) 385 9997 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Righton Electric INC | Jaime Lopez-Cruz | rightonelectricalservices@gmail.com | (510) 576 9209 | Electricians | Hayward · Alameda County | — | — |
| Rik's Remodeling | Rik's Remodeling | — | (510) 915 2384 | GC, remodel, ADU | Berkeley · Alameda County | — | — |
| Rios Sm Drywall | Everardo Sandoval | — | (510) 776 4191 | Other | Oakland · Alameda County | — | — |
| Rise Remodeling | Rise Remodeling | — | (408) 658 8581 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rising Image Construction | Bessie Marie Sholes | eben@eyebytes.com | (510) 383 1868 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rising Sun Electrify INC | Peter Tung Nguyen | info@risingsunelectrify.com | (510) 788 9092 | Electricians | Hayward · Alameda County | — | — |
| Ritchie's Custom Coatings | Ritchie's Custom Coatings | contact@sansoxygen.com | (925) 768 3202 | Windows, patio, painters | Livermore · Alameda County | — | — |
| Rivas Custom Electric | Edgar Bernardo Rivas | — | (510) 613 5756 | Electricians | San Leandro · Alameda County | — | — |
| River Land Construction INC | Rafael Toscano-Birrueta | — | (510) 230 5052 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rivera Roofing Systems INC | Emilio Perez Rivera | contact@sansoxygen.com | (510) 750 3220 | Other roofers | Hayward · Alameda County | — | — |
| Rivera's General Construction | Edgard Benjamin Rivera | — | (650) 454 4125 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Rivera's Heating & Air Conditioning | Rivera's Heating & Air Conditioning | — | (510) 483 4328 | HVAC | San Leandro · Alameda County | — | — |
| Rivers Plumbing Heating & Air | Steven Anthony Rivers | — | (925) 846 6000 | HVAC | Pleasanton · Alameda County | — | — |
| Rivertop Tile And Stone INC | Ramirez Ricardo Rios | — | (562) 239 6737 | Other | Hayward · Alameda County | — | — |
| Riviera Landscape & Maintenance | Riviera Landscape & Maintenance | — | (650) 207 1993 | Windows, patio, painters | Newark · Alameda County | — | — |
| Rizuo | Shengping Gao | — | (669) 292 3231 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Rj Electrical INC | Ren Weicheng | — | (415) 519 0648 | Electricians | San Leandro · Alameda County | — | — |
| Rlfc Construction LLC | Justin Immanuel Farrell | — | (510) 387 4845 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Rm 7 Gate Activation | Rm 7 Gate Activation | — | (510) 798 4156 | Other | Oakland · Alameda County | — | — |
| Rmb Construction Group INC | Rene Armando Morales-barreira | — | (510) 590 2379 | GC, remodel, ADU | Oakland · Alameda County | — | — |