| R & M Water Well Drilling & Pumps INC | Tiffany Leigh Mc Gee | — | (209) 772 2757 | Other | Valley Springs · Calaveras County | — | — |
| R A Pargett Engineering INC | Ronald Albert Pargett | — | (209) 754 3966 | Other | Mountain Ranch · Calaveras County | — | — |
| R C Baker Construction & Trenching | Randy Calvin Baker | — | (510) 300 5000 | GC, remodel, ADU | Copperopolis · Calaveras County | — | — |
| R G Construction | Richard Anthony Gardiner | — | (408) 472 8541 | GC, remodel, ADU | Angels Camp · Calaveras County | — | — |
| R Johnston Construction | Randy Lee Johnston | — | (209) 772 1238 | Other | Valley Springs · Calaveras County | — | — |
| R M Construction | Madrid Rickey | — | (209) 481 5559 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| R Sutton Enterprises LLC | Brad Kevin Sutton | — | (209) 736 4597 | Other | Vallecito · Calaveras County | — | — |
| Ramage Builders | Ramage Builders | — | (209) 293 4777 | Other | West Point · Calaveras County | — | — |
| Ranchero Plumbing | Ranchero Plumbing | — | (650) 922 4159 | Other | Valley Springs · Calaveras County | — | — |
| Rancho Tree Care Of California LLC | Varela Barajas Hector | — | (209) 663 8841 | Other | Valley Springs · Calaveras County | — | — |
| Randy Shrader Excavating | Randy Shrader Excavating | — | (408) 499 6990 | GC, remodel, ADU | Copperopolis · Calaveras County | — | — |
| Raymond Mechanical Services | Barry Kristoffer Raymond | — | (209) 774 6958 | HVAC | Valley Springs · Calaveras County | — | — |
| Rcs Painting | Rcs Painting | — | (209) 661 6444 | Windows, patio, painters | Mokelumne Hill · Calaveras County | — | — |
| Rebel Paint Co Ii | Mark Everett Patee | — | (209) 610 4113 | Windows, patio, painters | Arnold · Calaveras County | — | — |
| Reimund Kroeck Roofing Contractor | Reimund Frank Kroeck | — | (916) 531 1990 | Other roofers | San Andreas · Calaveras County | — | — |
| Renaissance Remodeling | Renaissance Remodeling | — | (209) 795 2502 | GC, remodel, ADU | Avery · Calaveras County | — | — |
| Rf Electric Services | Garrett Lee Radcliff | — | (209) 283 3413 | Electricians | Valley Springs · Calaveras County | — | — |
| Rice Construction | Joshua Duane Rice | — | (209) 770 4092 | GC, remodel, ADU | Avery · Calaveras County | — | — |
| Richard Gould | Richard Gould | rgould@richard-gould.com | (925) 519 3109 | GC, remodel, ADU | Mountain Ranch · Calaveras County | — | — |
| Richard L Inks Construction | Richard Lee Inks | — | (209) 840 1203 | GC, remodel, ADU | Murphys · Calaveras County | — | — |
| Richard Roberts Churchill | Richard Roberts Churchill | — | (209) 763 2972 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Rickey Theis Construction | Richard Eric Theis | — | (209) 840 4550 | GC, remodel, ADU | Arnold · Calaveras County | — | — |
| Rigmaiden Construction | Kenneth Christopher Rigmaiden | — | (209) 770 2718 | GC, remodel, ADU | Vallecito · Calaveras County | — | — |
| Rjr Plumbing INC | Robert Joseph Ross | — | (209) 649 5898 | Other | Valley Springs · Calaveras County | — | — |
| Robert Helton Construction | Robert John Helton | — | (209) 768 2826 | GC, remodel, ADU | Angels Camp · Calaveras County | — | — |
| Robert Ogren | Robert Ogren | — | (209) 747 4482 | Other | Mountain Ranch · Calaveras County | — | — |
| Robert Wilson Construction | Robert Paul Wilson | — | (209) 728 9320 | GC, remodel, ADU | Murphys · Calaveras County | — | — |
| Robinson Brothers Excavating INC | Michael Todd Robinson | — | (209) 795 4337 | GC, remodel, ADU | Arnold · Calaveras County | — | — |
| Rock Solid Construction | Jerry Dean Jr Frey | interested@domainmarket.com | (209) 795 0935 | Other | Arnold · Calaveras County | — | — |
| Rolleri Construction INC | Micah Domingo Rolleri | — | (209) 606 2974 | GC, remodel, ADU | Altaville · Calaveras County | — | — |
| Rolleri Excavation INC | Teonna Marie Rolleri | — | (209) 736 9409 | Other | Altaville · Calaveras County | — | — |
| Ron Truman Heating And Air Conditioning | Ronald Edward Truman | — | (209) 754 9421 | HVAC | San Andreas · Calaveras County | — | — |
| Ron Warner Plumbing | Ron Warner Plumbing | — | (209) 423 9275 | Other | Angels Camp · Calaveras County | — | — |
| Ronwright Construction | Ronald Martin Glass | — | (209) 795 7369 | GC, remodel, ADU | Camp Connell · Calaveras County | — | — |
| Roofing Enterprises LLC | Roofing Enterprises LLC | — | (619) 514-0434 | Other roofers | Carlsbad · Calaveras County | — | — |
| Roscelli Roofing INC | John Edwin Jr Roscelli | — | (209) 795 7270 | Other roofers | Murphys · Calaveras County | — | — |
| Roughstock Contruction | Mark Anthony Jr Foster | — | (209) 694 6939 | GC, remodel, ADU | Valley Springs · Calaveras County | — | — |
| Rusk Plumbing | Michael David Rusk | mike@ruskplumbing.com | (209) 772 8512 | Other | Valley Springs · Calaveras County | — | — |
| Russell J Peffer Plumbing | Russell J Peffer Plumbing | — | (209) 795 4551 | Other | Hathaway Pines · Calaveras County | — | — |
| Rutledge Security Systems | Rutledge Security Systems | — | (855) 952 8045 | Electricians | San Andreas · Calaveras County | — | — |