| Rau Roofing | John Martin Iii Sullivan | — | (209) 840 8271 | Other roofers | Jamestown · Tuolumne County | — | — |
| Ray Hall Construction INC | Donald Ray Hall | — | (209) 533 2114 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Re/max Gold Sonora | Re/max Gold Sonora | — | (916) 536-7600 | Property managers | Sonora · Tuolumne County | — | — |
| Real Deal Construction And Remodeling | John Steven Tennant | — | (209) 770 0844 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Recon Construction | Gary Albert Poalucci | — | (408) 497 7846 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Reel Electric | David John Reel | — | (209) 206 1831 | Electricians | Soulsbyville · Tuolumne County | — | — |
| Reimers Construction | Walter William Reimers | — | (209) 962 5682 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Rene Cano | Rene Cano | — | (209) 206 6609 | Other | Sonora · Tuolumne County | — | — |
| Renovation Construction | Douglas Laurence Field | — | (408) 309 8761 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Richard C Rice | Richard C Rice | — | (209) 743 5144 | GC, remodel, ADU | Soulsbyville · Tuolumne County | — | — |
| Richard Gilliam Const | Richard Gilliam Const | — | (209) 962 6305 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Richard Lee Scott | Richard Lee Scott | — | (209) 768 1115 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Richard Nisbet Construction | Richard Kelley Nisbet | — | (209) 814 3291 | GC, remodel, ADU | Long Barn · Tuolumne County | — | — |
| Rick Christiansen Construction | Rick Alan Christiansen | — | (209) 595 4861 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Ricky Davis Construction INC | Elizabeth Anne Davis | — | (209) 770 4485 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Ridgewood Painting | Ridgewood Painting | — | (209) 596 9466 | Windows, patio, painters | Sonora · Tuolumne County | — | — |
| Ringen's Unbiased Inspection | Ringen's Unbiased Inspection | — | (209) 533-5044 | Inspectors | Sonora · Tuolumne County | — | — |
| Rivera Construction | Richard Anthony Rivera | — | (209) 604 9334 | Other | Sonora · Tuolumne County | — | — |
| Robert Caldera Construction INC | Robert Jude Caldera | — | (209) 768 2287 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Robert Divine | Robert Divine | — | (209) 532 5941 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Robert Freiwald | Robert Freiwald | — | (209) 352 1642 | GC, remodel, ADU | Twain Harte · Tuolumne County | — | — |
| Robert J Riede Construction | Robert Jon Riede | — | (209) 768 0459 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Robert Miller Construction | Robert William Miller | — | (510) 599 2682 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Robert Newman | Robert Newman | rjnkeywest@aol.com | (209) 404 8446 | Other | Tuolumne · Tuolumne County | — | — |
| Robert Taylor Masonry INC | Robert Brian Taylor | micah@micahrich.com | (209) 770 3208 | Other | Soulsbyville · Tuolumne County | — | — |
| Robert's Construction | Robert Jake Breaux | — | (209) 352 2947 | GC, remodel, ADU | Mi Wuk Village · Tuolumne County | — | — |
| Robertson Plumbing | William Holmes Taylor | — | (209) 532 9172 | Other | Sonora · Tuolumne County | — | — |
| Robin Rowland | Robin Rowland | — | (209) 536-3000 | Property managers | Sonora · Tuolumne County | — | — |
| Robinson Roofing | Jeffrey Harry Sargo | — | (209) 588 9155 | Other roofers | Sonora · Tuolumne County | — | — |
| Rock Solid Creations INC | Brandon Lane Hoffman | — | (209) 962 1813 | Other | Groveland · Tuolumne County | — | — |
| Rocky Wolf Drywall | Rocky Wolf Drywall | — | (209) 743 5447 | Other | Columbia · Tuolumne County | — | — |
| Rocky's Tree Care INC DBA Rocky's Tree Gear | Rocky James Rozadilla | — | (209) 352 7433 | Tree | Sonora · Tuolumne County | — | — |
| Rocky’s Tree Care | Rocky’s Tree Care | — | (209) 202-3232 | Tree | Sonora · Tuolumne County | — | — |
| Rodes Mobile Welding A Partnership | Clayton Anthony Rosasco | — | (209) 352 8000 | Other | Columbia · Tuolumne County | — | — |
| Rodgers Construction INC | Michael Kane Rodgers | — | (209) 352 9600 | GC, remodel, ADU | Tuolumne · Tuolumne County | — | — |
| Rodney Gardner Raine | Rodney Gardner Raine | — | (209) 595 8029 | GC, remodel, ADU | Groveland · Tuolumne County | — | — |
| Ron Hessler Construction INC | Ronald Michael Hessler | — | (209) 768 7623 | GC, remodel, ADU | Columbia · Tuolumne County | — | — |
| Ron Jensen Construction | Ronald William Jensen | — | (209) 484 6024 | GC, remodel, ADU | Sonora · Tuolumne County | — | — |
| Ron Sewell Const | Ron Sewell Const | — | (209) 768 2687 | GC, remodel, ADU | Standard · Tuolumne County | — | — |
| Ronald Mardirosian DBA R & M Painting | R & M Painting | — | (209) 216 9307 | Windows, patio, painters | Soulsbyville · Tuolumne County | — | — |