| Riggs Custom Coatings | Riggs Custom Coatings | — | (805) 646 6921 | Windows, patio, painters | Ojai · Ventura County | — | — |
| Right-way Construction | Gregory Richard Mercado | — | (865) 309-5218 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Rigos Plastering INC | Lazaro Rivera Rigoberto | — | (805) 890 5243 | Other | Oxnard · Ventura County | — | — |
| Rincon Beach Construction INC | Cipriano Perez Ortiz | — | (805) 448 8922 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Rincon Consultants INC | R Scott English | — | (805) 644 4455 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Rincon Fire Alarm And Security | Mikael Acosta Melendez | — | (805) 500 8510 | Electricians | Ventura · Ventura County | — | — |
| Rincon Mountain Electric | Shaun Derek Siple | info@rinconmountainelectric.com | (805) 816 5478 | Electricians | Ventura · Ventura County | — | — |
| Rincon Property Management | Rincon Property Management | info@rinconmanagement.com | (805) 288-1119 | Property managers | Ventura · Ventura County | — | — |
| Rincon Traffic Control LLC | Jade Alyssa Murray | — | (805) 665 0200 | Other | Oxnard · Ventura County | — | — |
| Rios Tree Masters INC | Juan Manuel Rios Ceja | — | (805) 317 3825 | Other | Moorpark · Ventura County | — | — |
| Risvold Construction Company INC | Cory Jerome Risvold | cory@risvoldconstruction.com | (805) 377 9675 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Risvold Painting INC | Jerome Carl Risvold | — | (805) 522 2296 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Rivera Painting | Rivera Painting | — | (805) 253 5896 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Riveras Electric | Jacob Jason Rivera | — | (707) 346 7675 | Electricians | Hidden Valley · Ventura County | — | — |
| Rivian Adventure Network | Rivian Adventure Network | — | (866) 576-1496 | EV chargers | Ventura · Ventura County | — | — |
| Riviera Bronze Mfg LLC | Daniel Paul Aleksander | — | (805) 653 1943 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Riviera Builder INC | Gregorio Munoz | — | (805) 340 4029 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Rj Anseth Construction | Robert Russell Anseth | — | (805) 750 8359 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Rj Construction Company | Richard Peter Jackson | — | (310) 272 0359 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Rjw Construction | Regin James Wilson | — | (805) 651 0236 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Rk 7 Electric INC | Roberto Cruz | info@rkelectric.com | (805) 660 0494 | Electricians | Thousand Oaks · Ventura County | — | — |
| Rk Plumbing | Rk Plumbing | — | (805) 432 2457 | Other | Simi Valley · Ventura County | — | — |
| Rlc Plastering | Jonathan Enrique Barcenas | — | (805) 843 9817 | Other | Oxnard · Ventura County | — | — |
| Rm Empire Painting INC | Merino Maldonado Raul | rmempirepainting@gmail.com | (805) 746 5140 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Rmc Flooring | Rmc Flooring | — | (805) 760 3661 | Other | Ventura · Ventura County | — | — |
| Rmp Pool Service | Robert Michael Penczar | — | (805) 405 2231 | Pool | Thousand Oaks · Ventura County | — | — |
| Roa Refinishing Enterprises | Oleg Reut | — | (805) 491 2930 | Other | Simi Valley · Ventura County | — | — |
| Roa Specialized Refinishing Services | Oleg Reut | — | (805) 702 0807 | Other | Simi Valley · Ventura County | — | — |
| Road Runner Tile | Road Runner Tile | — | (805) 452 8112 | Other | Ventura · Ventura County | — | — |
| Roadway Consulting INC | Vincent Nicholas Dambrosi | info@roadwayconsulting.com | (310) 621 8865 | Other | Moorpark · Ventura County | — | — |
| Rob's Electric INC | Olmos-rangel Roberto | — | (805) 210 4201 | Electricians | Ventura · Ventura County | — | — |
| Robbin Cutenese | Robbin Cutenese | — | (661) 236 6356 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Robert A Coleman | Robert A Coleman | — | (805) 241 8409 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Robert A Hutton DBA Hutton Builders | Hutton Builders | — | (818) 715 9900 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Robert Allen Phillips Construction | Robert Allen Phillips | — | (805) 218 7713 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Robert C Liu | Robert C Liu | — | (626) 429 4856 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Robert Carbajal Electric | Carbajal Robert | — | (805) 469 1494 | Electricians | Camarillo · Ventura County | — | — |
| Robert Deyl Plumbing INC | Robert Alexander Deyl | — | (818) 606 4351 | Other | Simi Valley · Ventura County | — | — |
| Robert Heap Contracting | Robert Brian Heap | — | (818) 926 2869 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Robert Ira Schwartz | Robert Ira Schwartz | — | (805) 796 9092 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |