| Roofing & Beyond INC | Javier Valencia | — | (925) 481 8947 | Other roofers | Antioch · Contra Costa County | — | — |
| Roofing & Restoration INC | Francisco Jesus Prado | — | (510) 230 8110 | Other roofers | Pittsburg · Contra Costa County | — | — |
| Roofing Lopez | Juventino Obdulio Lopez Gomez | — | (925) 483 0044 | Other roofers | Brentwood · Contra Costa County | — | — |
| Roofs Roofs And Remodel INC | Philip Nicholas Koch | support@contractorwebzone.com | (925) 705 0044 | Other roofers | Pacheco · Contra Costa County | — | — |
| Root's Landscape INC | Gutierrez Rosendo Perez | — | (925) 497 8397 | Windows, patio, painters | Pittsburg · Contra Costa County | — | — |
| Rooted Retrofitting INC | Todd William Claus | — | (925) 378 2204 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Rooter-man | John Scott Mc Cartney | — | (925) 565 8224 | Other | Walnut Creek · Contra Costa County | — | — |
| Roque Castro General Contractor | Roque Castro General Contractor | — | (510) 508 3750 | GC, remodel, ADU | San Pablo · Contra Costa County | — | — |
| Rosales Painting INC | Juan Francisco Rosales | — | (925) 206 8994 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Rosas Landscaping | Rosas Landscaping | — | (925) 209 4390 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Rosas Tree Care Service | Francisco Elise Corona Garcia | — | (510) 501 1380 | Tree | Concord · Contra Costa County | — | — |
| Rosil Construction | Ednon Redito Rosil | — | (415) 260 2014 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Roston Construction | Jose Dolores Fajardo | — | (925) 360 7614 | GC, remodel, ADU | Bay Point · Contra Costa County | — | — |
| Round 2 It | Round 2 It | — | (925) 864 5318 | GC, remodel, ADU | Pittsburg · Contra Costa County | — | — |
| Rovnanikconstruction LLC | Brian Dennis Rovnanik | — | (707) 290 5459 | GC, remodel, ADU | Danville · Contra Costa County | — | — |
| Rowdy Construction INC DBA C P C Construction | John Andrew Iii Continente | — | (925) 679 2982 | GC, remodel, ADU | Oakley · Contra Costa County | — | — |
| Rowdy Red Construction LLC | Thomas Patrick Beritzhoff | — | (415) 310 9059 | GC, remodel, ADU | Orinda · Contra Costa County | — | — |
| Rowe Painting | Rowe Painting | — | (925) 383 8061 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Rowland Development & Contrucction | Rowland Development & Contrucction | — | (925) 631 0833 | GC, remodel, ADU | Moraga · Contra Costa County | — | — |
| Roya Construction | Biarash Massoud | — | (925) 998 1150 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Royal Floors | Royal Floors | info@royal-floors.com | (510) 228 2994 | GC, remodel, ADU | El Sobrante · Contra Costa County | — | — |
| Royal Landscape | Royal Landscape | — | (650) 444 1348 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Royal Rooter | Royal Rooter | — | (925) 595 0397 | Other | Antioch · Contra Costa County | — | — |
| Royal Valley Roofing | Royal Roger David Valley | — | (925) 890 2340 | Other roofers | Concord · Contra Costa County | — | — |
| Royal View Landscaping INC | Jovanni Padilla | — | (510) 334 3680 | Windows, patio, painters | Richmond · Contra Costa County | — | — |
| Royal's Painting | Royal's Painting | — | (707) 208 1369 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Royale Air Heating And Air Conditioning | Abbad Abdellah | — | (510) 285 7491 | HVAC | Brentwood · Contra Costa County | — | — |
| Royalty Roofing & Waterproof INC | Miguel Acosta Garcia | — | (510) 630 5634 | Other roofers | El Cerrito · Contra Costa County | — | — |
| Rozafa Construction | Palalej Bert | rozafaconstruction@hotmail.com | (415) 341 3599 | GC, remodel, ADU | Pinole · Contra Costa County | — | — |
| Rp Construction | Richard Gene Pagey | — | (925) 518 8258 | GC, remodel, ADU | Walnut Creek · Contra Costa County | — | — |
| Rpc Remodeling & Construction | Rafael Padilla | — | (650) 464 1187 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Rrr Hardwood Floors | Rrr Hardwood Floors | — | (415) 524 6966 | Other | San Pablo · Contra Costa County | — | — |
| Rs Painting INC | Robert Dennis Jr Strong | — | (925) 408 2818 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Rs Woodbridge A Joint Venture | Ruction Service S Avelar Richard & Associates Reconst | — | (925) 433 0403 | GC, remodel, ADU | Concord · Contra Costa County | — | — |
| Rsr Development | Rsr Development | — | (925) 817 7368 | GC, remodel, ADU | Alamo · Contra Costa County | — | — |
| Ruben Carbajal Perfect Touch Painting And Decorating | Ruben Alberto Carbajal | — | (925) 451 2738 | Windows, patio, painters | Concord · Contra Costa County | — | — |
| Ruben's Crew Construction INC | Alexis Ruben Flores Gallegos | — | (925) 354 7057 | GC, remodel, ADU | Antioch · Contra Costa County | — | — |
| Ruben's Plumbing | Ruben's Plumbing | — | (925) 876 3518 | Other | Walnut Creek · Contra Costa County | — | — |
| Rubicon Contruction | Joshua Martin Madrid | — | (925) 280 2886 | GC, remodel, ADU | Pleasant Hill · Contra Costa County | — | — |
| Rubicon Enterprises INC | Nancy Marie Emery | — | (510) 231 3950 | Windows, patio, painters | Richmond · Contra Costa County | — | — |