| Robert E Sutton Company INC | Eric Lang Sutton | — | (530) 587 4161 | Other | Truckee · Nevada County | — | — |
| Robert F Medlyn DBA R F M Integrations | R F M Integrations | — | (530) 913 1654 | Electricians | Grass Valley · Nevada County | — | — |
| Robert Herrell | Robert Herrell | — | (530) 210 4926 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Robert L Porta General Contractor | Robert L Porta General Contractor | — | (530) 477 5628 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| Robert Wise Construction | Robert Lawrence Wise | — | (530) 277 8303 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Roberts Tree Care | Roberts Tree Care | — | (530) 274 8966 | Tree | Grass Valley · Nevada County | — | — |
| Robinson Enterprises INC | Timothy Edgar Robinson | — | (530) 265 5844 | Tree | Nevada City · Nevada County | — | — |
| Robinson Enterprises Investment Company INC | Donald Charles Hoffler | — | (530) 265 5844 | Other | Nevada City · Nevada County | — | — |
| Rock & Rose INC | Erik Latham Neu | — | (530) 550 7744 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Rock Creek Builders | Rock Creek Builders | info@rockcreekbuilders.com | (530) 913 5847 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Rocky Oaks INC DBA Dcb Concrete | Deto Crit Ortiz | — | (530) 263 1275 | Other | Grass Valley · Nevada County | — | — |
| Rodney Ray Martinson | Rodney Ray Martinson | — | (530) 268 2199 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Rogers General Engineering | Rogers General Engineering | — | (530) 587 3452 | Windows, patio, painters | Truckee · Nevada County | — | — |
| Rogers Rig Welding | Rogers Rig Welding | — | (916) 622 5070 | Other | Grass Valley · Nevada County | — | — |
| Rohm Construction Co | Robert Michael Rohm | — | (530) 382 2614 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Roland's Concrete Pumping | Roland's Concrete Pumping | — | (530) 477 5216 | Other | Cedar Ridge · Nevada County | — | — |
| Romero's Landscape INC | Duglas Atilio Romero-amaya | romeroslandscape@yahoo.com | (530) 308 1783 | Windows, patio, painters | Grass Valley · Nevada County | — | — |
| Ron's Country Homes | Ron's Country Homes | — | (530) 446 4338 | GC, remodel, ADU | Cedar Ridge · Nevada County | — | — |
| Rothchild Construction | Loren Dallas Rothchild | — | (530) 329 9271 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Rough And Ready Land Management LLC | Peter Michael Jose Crane | — | (530) 728 0881 | Windows, patio, painters | Rough And Ready · Nevada County | — | — |
| Royal Touch Tile | William Thomas Kenderes | — | (916) 496 7019 | Other | Grass Valley · Nevada County | — | — |
| Rubicon Construction Co LLC | Martin Ezequiel O'gorman | — | (530) 386 5329 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Rubicon Roofing | Quintana Jose Olarte | — | (530) 575 2362 | Other roofers | Grass Valley · Nevada County | — | — |
| Rugged Rock Engineering | Daniel Thomas Turek | — | (530) 559 7893 | Other | Nevada City · Nevada County | — | — |
| Ruppert INC | Timothy Paul Ruppert | firstname@ruppert.com | (530) 303 2259 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Russell P Johannsen | Russell P Johannsen | — | (530) 277 3408 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Rustic Mountain Construction INC | Matthew James Rust | — | (530) 386 0916 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Rusty Rangers | Andrew Graham Paterson | — | (541) 708 9339 | Other | Nevada City · Nevada County | — | — |
| Rutherford Scott Hayes | Rutherford Scott Hayes | — | (707) 480 6883 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Ruxpin Construction | Andrew Vincent Ferreira | — | (530) 559 2264 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| Ryan Construction Services INC | James Michael Ryan | — | (916) 742 8742 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| Ryan Dejesus | Ryan Dejesus | — | (415) 969 1966 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| Ryanbuilt Construction | Ryan Stephen Smith | — | (530) 498 0839 | GC, remodel, ADU | Truckee · Nevada County | — | — |
| S & P Excavating | Michael Dean Peterson | — | (530) 913 0289 | Other | Penn Valley · Nevada County | — | — |
| S C Tree Service | Saira Zulema Cervantes | — | (530) 559 2725 | Tree | Penn Valley · Nevada County | — | — |
| S D J Construction INC | Stephen Deane Jackson | — | (530) 265 5767 | GC, remodel, ADU | Nevada City · Nevada County | — | — |
| S J Peterson Construction | Steven Joseph Peterson | — | (530) 913 7326 | GC, remodel, ADU | Penn Valley · Nevada County | — | — |
| S L I Tree Services | Michael Kent Bengston | — | (530) 272 2390 | Tree | Grass Valley · Nevada County | — | — |
| S M Meyers Construction | Samuel Michael Meyers | — | (530) 318 7852 | GC, remodel, ADU | Grass Valley · Nevada County | — | — |
| S Miller Paving INC | Scott Christopher Miller | — | (530) 272 0220 | Other | Penn Valley · Nevada County | — | — |