| R C Jackson Construction | Robert Curtis Jackson | — | (415) 499 3177 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| R C Souza Painting | R C Souza Painting | rcsouza1019@gmail.com | (415) 328 7941 | Windows, patio, painters | Novato · Marin County | — | — |
| R De Leon Construction | Even John Rodas De Leon | — | (415) 686 5083 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| R Fuhrman Construction | Robert Cole Fuhrman | — | (415) 499 2958 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| R H Construction | Emele Romeo Heaven | — | (415) 302 7044 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| R H Hydronics | R H Hydronics | — | (415) 453 3040 | HVAC | San Rafael · Marin County | — | — |
| R J Anstey Builders | R J Anstey Builders | — | (415) 457 6356 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| R J Minton Jr | R J Minton Jr | — | (415) 308 0702 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| R J Rehm Construction | Rudolph John Iii Rehm | — | (415) 450 1334 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| R M C Contractors INC | Ryan Christopher Mcdonald | — | (530) 414 1109 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| R M Cerutti - Builder | R M Cerutti - Builder | — | (415) 860 6114 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| R M Construction | Moore Rory | — | (415) 716 6083 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| R M L Productions INC | Robert Michael Levy | — | (415) 730 5389 | Other | San Rafael · Marin County | — | — |
| R N Development INC | Robert Charles Mellett | — | (415) 298 6169 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| R O L Construction | Roaltz Ottoniel Lopez Velasquez | — | (415) 518 2034 | GC, remodel, ADU | Novato · Marin County | — | — |
| R O'keeffe Construction | Richard James O'keeffe | — | (415) 225 6640 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| R Pulu Concrete | R Pulu Concrete | — | (415) 595 6528 | Other | Novato · Marin County | — | — |
| R S P Group INC | Paula June Bakjajian | — | (415) 847 0877 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| R T Wilson Plumbing | R T Wilson Plumbing | robert@rtwilsonplumbing.com | (415) 488-1806 | Other | Forest Knolls · Marin County | — | — |
| R W Collings General Contractor | R W Collings General Contractor | — | (415) 793 4005 | GC, remodel, ADU | Novato · Marin County | — | — |
| R W R Construction INC | Roderic Wellman Roche | adrian@rwrconstruction.com | (415) 457 5658 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| R Z Custom Painting | R Z Custom Painting | — | (415) 233 2593 | Windows, patio, painters | Novato · Marin County | — | — |
| R&r Construction Svcs | James Summer Iii Mcmillan | — | (415) 250 8453 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Rabb & Co Builders INC | Daniel Philip Blake | — | (415) 850 7780 | GC, remodel, ADU | Novato · Marin County | — | — |
| Rac Construction INC | James Russell Campbell | estimating@racconstruction.biz | (415) 302 8899 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Radco & Associates INC | James Allen Radu | — | (415) 407 2649 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Radiant Way Incorporated Ii | Bernard Michael Cameron | — | (415) 839 6470 | Other | San Rafael · Marin County | — | — |
| Radloff Construction | Fred Carlan Radloff | — | (415) 577 5109 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| Rafael Floor Covering INC | Steven John Villa | — | (415) 456 3656 | Other | San Rafael · Marin County | — | — |
| Rafael's Painting INC | Geovanny Rafael Muralles Navichoque | — | (510) 491 6994 | Windows, patio, painters | San Geronimo · Marin County | — | — |
| Raff's Construction Services INC | Rafael Eugenio Rodriguez-Romagosa | — | (415) 846 1244 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Railroad Signal Specialists INC | Scott Foriest Cunningham | — | (415) 328 4137 | Electricians | Novato · Marin County | — | — |
| Rake Electric | John Frank Rake | — | (415) 459 8005 | Electricians | San Rafael · Marin County | — | — |
| Ramin Amirghassemkhany | Ramin Amirghassemkhany | — | (415) 331 3402 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Ramon Cadiz | Ramon Cadiz | ramon@ramoncadiz.com | (415) 298 0983 | GC, remodel, ADU | Inverness · Marin County | — | — |
| Ramos Garcia Drywall | Ramos Garcia Drywall | — | (415) 342 9108 | Other | San Rafael · Marin County | — | — |
| Ramsey Jeff Construction | Jeffrey Eugene Ramsey | — | (415) 963 2485 | GC, remodel, ADU | Novato · Marin County | — | — |
| Randall Masonry Design | Randall Masonry Design | — | (415) 798 0048 | Other | Novato · Marin County | — | — |
| Ranum Builders | Ranum Builders | — | (415) 564 8880 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Rasmussen Construction | David Vernon Jr Rasmussen | — | (415) 892 8244 | GC, remodel, ADU | Novato · Marin County | — | — |