| Road Safety INC | Jason Gregory Bamberg | — | (916) 543 4600 | Other | Rocklin · Placer County | — | — |
| Roar Development Group | Paul Emmanuel Galushkin | — | (916) 224 8048 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Roark Construction | Russell Lee Roark | — | (530) 906 9288 | GC, remodel, ADU | Colfax · Placer County | — | — |
| Rob Johnson Construction INC | Robert Franklin Iii Johnson | — | (916) 505 0874 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Rob Shipley Construction INC | Robert Franklin Ii Shipley | — | (530) 906 3152 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Rob Walker Construction | Robert Jerry Walker | — | (916) 835 7774 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Rob Zimmerman Plumbing | Rob Zimmerman Plumbing | — | (530) 308 1251 | Other | Colfax · Placer County | — | — |
| Robbins Electric | Ryan Erik Robbins | — | (530) 840 7127 | Electricians | Newcastle · Placer County | — | — |
| Robert Bishop | Robert Bishop | — | (916) 699 2001 | Windows, patio, painters | Roseville · Placer County | — | — |
| Robert Boeger Plastering INC | Steven Michael Boeger | — | (530) 878 4726 | Other | Meadow Vista · Placer County | — | — |
| Robert Fletcher | Robert Fletcher | interested@domainmarket.com | (530) 913 1218 | GC, remodel, ADU | Colfax · Placer County | — | — |
| Robert Graves Construction | Robert Eldon Graves | — | (916) 206 7353 | GC, remodel, ADU | Applegate · Placer County | — | — |
| Robert J Boehm Builder | Robert J Boehm Builder | — | (916) 208 4177 | GC, remodel, ADU | Loomis · Placer County | — | — |
| Robert J Borchin | Robert J Borchin | — | (916) 539 5974 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Robert J Wirth Construction INC | Robert Jerome Wirth | — | (916) 997 1283 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Robert L Stevenson Electric Service | Robert Louis Stevenson | — | (916) 276 4360 | Electricians | Newcastle · Placer County | — | — |
| Robert Laier | Robert Laier | — | (916) 764 2112 | Electricians | Meadow Vista · Placer County | — | — |
| Robert Lancaster Wall Covering | Robert Lancaster Wall Covering | — | (916) 740 0782 | Other | Lincoln · Placer County | — | — |
| Robert Mason Remediation | Robert Mason Remediation | — | (916) 201 6581 | Other | Auburn · Placer County | — | — |
| Robert Matthew Bissell | Robert Matthew Bissell | — | (916) 735 0295 | GC, remodel, ADU | Roseville · Placer County | — | — |
| Robert Morken Construction INC | Robert Edward Morken | — | (530) 386 1512 | GC, remodel, ADU | Tahoe Vista · Placer County | — | — |
| Robert Schultz Co | Robert Lee Schultz | schultz@roanoke.edu | (530) 885 1183 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Robert Simonini Renovations | Robert Simonini Renovations | — | (530) 401 4442 | GC, remodel, ADU | Colfax · Placer County | — | — |
| Robert Varon | Robert Varon | — | (530) 308 2815 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Robert Wright | Robert Wright | — | (530) 917 7273 | GC, remodel, ADU | Kings Beach · Placer County | — | — |
| Robert's Heating And Air | Robert Anthony Powning | — | (916) 600 2046 | HVAC | Roseville · Placer County | — | — |
| Robinson Construction Company | Robert Clifton Robinson | bill@robinson-construction.com | (805) 258-1646 | GC, remodel, ADU | Auburn · Placer County | — | — |
| Robinson Pools & Spas | Robinson Pools & Spas | — | (916) 259 4942 | Pool | Rocklin · Placer County | — | — |
| Robinson's Tractor Works | Robinson's Tractor Works | — | (916) 217 4367 | Other | Roseville · Placer County | — | — |
| Robs Sanitation Systems | Robs Sanitation Systems | — | (916) 622 3808 | Other | Roseville · Placer County | — | — |
| Rock Creek Builders | Pavel Petru Balint | info@rockcreekbuilders.com | (916) 203 1765 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Rock Of Ages Tile & Stone Company | Garrett Warren Curtis | — | (916) 741 9145 | Other | Loomis · Placer County | — | — |
| Rock Solid Construction LLC | Lance Elliot Barmettler | interested@domainmarket.com | (530) 908 4162 | GC, remodel, ADU | Lincoln · Placer County | — | — |
| Rockface Waterscapes | Rockface Waterscapes | — | (916) 792 0907 | Windows, patio, painters | Loomis · Placer County | — | — |
| Rocklin Glass And Mirror INC | Barry Gene Grafe | — | (916) 624 4582 | Windows, patio, painters | Rocklin · Placer County | — | — |
| Rocklin Heating And Air Conditioning Company INC | Erik Douglas Monnier | — | (916) 626 5151 | HVAC | Rocklin · Placer County | — | — |
| Rocklin Painting | Rocklin Painting | — | (916) 223 3393 | Windows, patio, painters | Lincoln · Placer County | — | — |
| Rocklin Pool & Spa Service | Richard Louis Iii Dimeola | — | (916) 798 8822 | Pool | Rocklin · Placer County | — | — |
| Rocklin Property Management | Rocklin Property Management | — | (916) 741-6823 | Property managers | Rocklin · Placer County | — | — |
| Rockwood Tree Service | Elizabeth Kathryn Moxley | — | (530) 546 9999 | Tree | Kings Beach · Placer County | — | — |