| R2 Mechanical INC | Randy De Wayne Elledge | — | (707) 747 5592 | HVAC | Benicia · Solano County | — | — |
| R4 Construction LLC | Roberto| Carras Co Robert Jimenez Carrasco | lawrence@r4-construction.com | (707) 310 5938 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| R7 Construction | Ramirez Guzman Guillermo | — | (510) 776 8542 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Raffi's Painting INC | Jimenez Rafael Anguiano | — | (707) 564 7660 | Windows, patio, painters | Vacaville · Solano County | — | — |
| Raines Construction | Angela Marie Raines | — | (925) 285 5558 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Ralph Dennis INC DBA Dennis & Sons Cement | Ralph Gordon Dennis | — | (707) 688 3794 | Other | Vacaville · Solano County | — | — |
| Ralston Enterprises | David Glenn Ralston | — | (707) 410 7293 | Electricians | Vacaville · Solano County | — | — |
| Ramirez Custom Overhead Doors | Rudy Daniel Ramirez | — | (707) 451 2700 | Other | Vacaville · Solano County | — | — |
| Ramirez Ornamental Iron | Ramirez Ornamental Iron | — | (707) 386 8557 | Other | Fairfield · Solano County | — | — |
| Ramirez Painting | Ramirez Painting | — | (707) 450 8360 | Windows, patio, painters | Suisun City · Solano County | — | — |
| Ramirons | Ramirez Efrain | — | (415) 532 5142 | Other | Vallejo · Solano County | — | — |
| Randell D Norman | Randell D Norman | — | (209) 470 2522 | HVAC | Benicia · Solano County | — | — |
| Randu Originals Ceramic Tile | Randu Originals Ceramic Tile | — | (702) 310 7591 | Other | Vallejo · Solano County | — | — |
| Randy Giles Floor Contracting | Randolph Ray Giles | — | (510) 551 5424 | Other | Benicia · Solano County | — | — |
| Raul Diaz Construction LLC | Raul Diaz | — | (925) 334 2664 | Other roofers | Vallejo · Solano County | — | — |
| Raully Jones Construction | Raully Kynn Jones | — | (415) 798 0459 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Ray Camacho Electric | Raymond R Camacho | — | (707) 315 2239 | Electricians | Vallejo · Solano County | — | — |
| Ray's Tree Services INC | Daisy Sanchez-Herrera | — | (707) 554 0639 | Other | Vallejo · Solano County | — | — |
| Red Line Remodeling & Design LLC | Lyle Jared Selph | — | (209) 986 6863 | GC, remodel, ADU | Rio Vista · Solano County | — | — |
| Red Lion Window Treatments | Red Lion Window Treatments | — | (707) 770 6173 | Other | Fairfield · Solano County | — | — |
| Redeemed Air | Redeemed Air | redeemedairandhvac@gmail.com | (707) 580 7887 | HVAC | Fairfield · Solano County | — | — |
| Redwood Home Renovations LLC | Trevor Steven Busterna | — | (707) 571 9125 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Reed Automotive Equipment | Reed Automotive Equipment | — | (707) 319 2322 | Other | Vacaville · Solano County | — | — |
| Regional Roofing | James Steven Mason | info@regionalroofing.com | (707) 422 7948 | Other roofers | Fairfield · Solano County | — | — |
| Rehm & Company | Daniel Francis Rehm | — | (707) 486 4530 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Reid Construction & Maintenance | Benjamin Stuart Reid | — | (707) 399 7009 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Reimoc Construction INC | Richard Barry Jabour | jonpinhorn.typedesign@gmail.com | (707) 416 5562 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Reinthaler Construction | William Jay Reinthaler | — | (510) 472 7829 | GC, remodel, ADU | Benicia · Solano County | — | — |
| Reliable Electric | Gregory James Rudolph | — | (707) 365 9681 | Electricians | Vacaville · Solano County | — | — |
| Reliance Construction Services INC | Jorge Manzo | — | (707) 812 2016 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Remodel Ninjas | Remodel Ninjas | kirk@remodelninjas.com | (707) 451 7633 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Renaissance Remodeling | Renaissance Remodeling | — | (707) 758 4662 | GC, remodel, ADU | Vacaville · Solano County | — | — |
| Rendon Heating & Air INC | David Rendon | — | (707) 999 8069 | HVAC | Vacaville · Solano County | — | — |
| Rened Builders | Rened Builders | — | (707) 694 6881 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Renner Heating & Air Conditioning INC | Justin Paul Renner | — | (707) 416 9239 | HVAC | Vacaville · Solano County | — | — |
| Renovative Painting | Phillip Clay Sr Hunter | — | (707) 419 9122 | Windows, patio, painters | Vallejo · Solano County | — | — |
| Renovo Build INC | Mansilla Ruben Galindo | — | (707) 439 6979 | GC, remodel, ADU | Fairfield · Solano County | — | — |
| Reyes Electric | Antonio Garcia Reyes | — | (707) 747 6818 | Electricians | Benicia · Solano County | — | — |
| Rg Construction | Richard Edward Gonzalez | — | (510) 334 2134 | GC, remodel, ADU | Vallejo · Solano County | — | — |
| Rg Renovation Services | Galicia Ricardo Gonzalez | — | (707) 514 9631 | GC, remodel, ADU | Vacaville · Solano County | — | — |