| Reborn Flooring INC | Sergio Javier Contreras Navarro | — | (209) 427 8802 | Other | Denair · Stanislaus County | — | — |
| Recon Electric | Victor Alonzo Zendejas | — | (209) 564 7310 | Electricians | Turlock · Stanislaus County | — | — |
| Redbird Framing INC | Jeremy Allen Kirkpatrick | — | (931) 478 5943 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Redwood Coast Construction | Matteson Tyler Wright | — | (209) 620 5478 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Reece Concrete INC | Baltazar Perez Yepez | — | (209) 495 2911 | Other | Modesto · Stanislaus County | — | — |
| Reform Innovation Tile & Stone LLC | Ramon Jr Hernandez | — | (209) 569 6583 | Other | Turlock · Stanislaus County | — | — |
| Reform Renovation | Reform Renovation | — | (209) 919 0207 | GC, remodel, ADU | Salida · Stanislaus County | — | — |
| Regen Electrical LLC | Isaac Jospeh Hensley | — | (209) 985 5375 | Electricians | Ceres · Stanislaus County | — | — |
| Regional Garage Doors | Regional Garage Doors | — | (510) 274 3059 | Other | Salida · Stanislaus County | — | — |
| Reha Construction LLC | Jack Arthur Paquin | — | (831) 915 2026 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Reisz Construction Company | Bradley William Reisz | office@reiszconstruction.com | (209) 988 9374 | GC, remodel, ADU | Hughson · Stanislaus County | — | — |
| Reliable Fencing Services | Cortes Loera Everardo | — | (209) 409 9486 | Other | Modesto · Stanislaus County | — | — |
| Relvas Custom Stone & Tile | Relvas Custom Stone & Tile | — | (209) 402 1237 | Other | Modesto · Stanislaus County | — | — |
| Rembrandt Construction | Wade Allen Marmon | — | (209) 605 2746 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Renovating Dimensions Painting | Renovating Dimensions Painting | — | (510) 680 9491 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Renteria's Drywall INC | Navarrete Alfredo Renteria | — | (209) 534 7982 | Other | Modesto · Stanislaus County | — | — |
| Republic Air Conditioning Company | Edward Anthony Jr Kelly | — | (760) 568 5600 | HVAC | Newman · Stanislaus County | — | — |
| Reputation Builders & Handyman Service | Ron Eli Coin | — | (209) 312 4169 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Resilience Roofing Services INC | Juan Jose Deras | — | (209) 648 0012 | Other roofers | Keyes · Stanislaus County | — | — |
| Restoration Builder | Restoration Builder | — | (209) 602 5262 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Restored By Masters INC | Marcel Mike Abdesha | — | (818) 800 7661 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Reyes Construction | Basilio Eliseo Reyes | — | (209) 605 7181 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Reyes Demolition | Reyes Demolition | — | (209) 604 7096 | Other | Modesto · Stanislaus County | — | — |
| Reyes Flooring INC | Orozco Omero Reyes | reyesflooring831@gmail.com | (831) 359-8978 | Other | Modesto · Stanislaus County | — | — |
| Reyes Home Remodeling | Reyes Home Remodeling | — | (510) 914 0484 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Rf General Engineering INC | Jose Angel Rodriguez Figueroa | — | (209) 585 0766 | Other | Turlock · Stanislaus County | — | — |
| Rhinos Plumbing INC | Sixto Marquez | — | (209) 485 1724 | Other | Denair · Stanislaus County | — | — |
| Rhodehouse Windows And Doors | Rhodehouse Windows And Doors | — | (209) 499 1301 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Rhodes Construction | James David Jr Rhodes | interested@domainmarket.com | (209) 402 6272 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Rhodes Quality Concrete | Rhodes Quality Concrete | info@ndiscovered.com | (209) 214 1973 | Other | Turlock · Stanislaus County | — | — |
| Rich Construction | Richard Scott Rivera | — | (209) 495 2493 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Richard A Lowry | Richard A Lowry | — | (209) 545 0791 | Other | Salida · Stanislaus County | — | — |
| Richard Crawford | Richard Crawford | — | (209) 614 7717 | HVAC | Oakdale · Stanislaus County | — | — |
| Richard Logan Petero Jr DBA Logans Floor Covering | Logans Floor Covering | — | (209) 534 5953 | Other | Modesto · Stanislaus County | — | — |
| Richard Townsend Construction INC DBA R T C | Richard Allen Townsend | — | (209) 652 4909 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Richards Welding | Richards Welding | — | (209) 252 6907 | Other | Newman · Stanislaus County | — | — |
| Richardson's Custom Painting | Dustin Von Richardson | — | (209) 495 5880 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Richey Roofing | Johnny Lee Hood | — | (209) 883 9262 | Other roofers | Modesto · Stanislaus County | — | — |
| Rick Bills | Rick Bills | — | (209) 607 1892 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Rick Liukkonen Tractor Service | Richard Anthony Liukkonen | — | (209) 612 2762 | Other | Oakdale · Stanislaus County | — | — |