| Rapid Response Remediation INC | Timothy Mark Nava | — | (925) 634 4685 | GC, remodel, ADU | Linden · San Joaquin County | — | — |
| Rapidline Electric INC | Ricardo Manuel Jr Del Rio | — | (510) 387 9816 | Electricians | Escalon · San Joaquin County | — | — |
| Rascom Builders | Rascom Builders | — | (209) 814 1022 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Raul Medinas's Painting | Raul Medinas's Painting | — | (209) 451 8238 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Raul Murillo Framing | Raul Murillo Framing | — | (408) 726 9822 | Other | Manteca · San Joaquin County | — | — |
| Raul Yurivilca | Raul Yurivilca | — | (209) 598 9088 | Other | Stockton · San Joaquin County | — | — |
| Rauls Irrigation LLC | Raul Fernandez | impallari@gmail.com | (209) 683 6560 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Rauser Environmental | Rauser Environmental | — | (209) 810 0730 | GC, remodel, ADU | Woodbridge · San Joaquin County | — | — |
| Ray Branyan | Ray Branyan | — | (209) 481 6744 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Ray Uecker Construction | Uecker Ray Construstion | — | (209) 482 5032 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Ray's Iron Works | Ray's Iron Works | — | (209) 331 3392 | Other | Lodi · San Joaquin County | — | — |
| Raymond Allen Guthmiller Ii | Raymond Allen Guthmiller Ii | — | (209) 603 2557 | GC, remodel, ADU | Ripon · San Joaquin County | — | — |
| Raymus Construction INC | Toni Marie Raymus | — | (209) 824 3080 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Raz Builders INC | Amarjeet Singh | raz@razbuilders.com | (209) 400 0001 | GC, remodel, ADU | Lathrop · San Joaquin County | — | — |
| Rb Environmental INC | Olga Melanie Garcia | impallari@gmail.com | (209) 932 0606 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Rcj Construction INC | Jalandhar Kongara | — | (209) 481 0403 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Rcm Fire Protection LLC | Ramon Charles Misfeldt | ramon@rcmfireprotection.com | (209) 833 8228 | Electricians | Tracy · San Joaquin County | — | — |
| Rcp Construction | Rajendra Parsad Charan | info@rcpconstruction.com | (209) 214 0954 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Rdk Construction | Richard Dale Koyama | — | (209) 727 9500 | GC, remodel, ADU | Lockeford · San Joaquin County | — | — |
| Rdk Construction INC | Hernandez Cesar Borboa | — | (650) 248 0598 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Rds Construction | Robert Douglas Snider | — | (209) 992 1592 | Electricians | French Camp · San Joaquin County | — | — |
| Ready 2 Remodel | Ready 2 Remodel | — | (510) 648 9003 | GC, remodel, ADU | Mountain House · San Joaquin County | — | — |
| Reasoner Construction | Kenneth Lester Reasoner | — | (209) 815 2091 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Reco Roofing INC | Heidi Berenice Cervantes | — | (209) 251 9028 | Other roofers | Tracy · San Joaquin County | — | — |
| Reconcile Construction INC | Shane Charles Mahoney | — | (209) 712 7455 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Red Eye Concrete & Surface Solutions INC | Mark Anthony Jr Foster | — | (209) 627 6607 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Red Vg Electric INC | Morales Vicente Gonzalez | — | (209) 815 6216 | Electricians | Stockton · San Joaquin County | — | — |
| Reds Power Electric INC | Marcelo Duenas Briseno | info@redspowerelectric.com | (209) 278 4638 | Electricians | Tracy · San Joaquin County | — | — |
| Reese's Installations | Reese's Installations | — | (209) 631 1750 | Other | Lockeford · San Joaquin County | — | — |
| Reese's Sealcoating INC | Hunter Blair Reese | — | (209) 712 3323 | Other | Lockeford · San Joaquin County | — | — |
| Reider Controls INC | Jeremy Thomas Reider | — | (209) 701 9885 | Electricians | Escalon · San Joaquin County | — | — |
| Reliable Technical Installations INC | Robb Conrad Joos | — | (510) 714 7442 | Other | Linden · San Joaquin County | — | — |
| Renewable Technologies INC | Bradlee John Conklin | — | (209) 267 5225 | Electricians | Stockton · San Joaquin County | — | — |
| Renovate Pro | Renovate Pro | — | (209) 229 0618 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Renue Restoration And Management Corporation | David John Arnaiz | — | (209) 595 1982 | HVAC | Stockton · San Joaquin County | — | — |
| Rescomm Heating & AC INC | Brian Keith Treanor | — | (209) 832 8352 | HVAC | Tracy · San Joaquin County | — | — |
| Rescue Roofer | Timothy John Glass | — | (209) 663 6125 | Other roofers | Manteca · San Joaquin County | — | — |
| Retes Mechanical | Retes Mechanical | — | (209) 403 5125 | HVAC | Stockton · San Joaquin County | — | — |
| Revamp Build INC | Ahmad Jawad Mohammadi | — | (510) 556 6798 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Revive Remodeling Pros | Ramon Heriberto Navarrete Frayde | reviveremodelingpros@gmail.com | (925) 206 6220 | Electricians | Stockton · San Joaquin County | — | — |