| Robert Joseph Pavone | Robert Joseph Pavone | — | (562) 755 6441 | Electricians | Thousand Oaks · Ventura County | — | — |
| Robert Llamas Construction | Robert Victor Llamas | — | (805) 857 4555 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Robert Lynn Goodman | Robert Lynn Goodman | — | (805) 637 4986 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Robert M Dee Associates | Robert Michael Dee | — | (805) 529 2413 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Robert M Zucca | Robert M Zucca | — | (820) 207 2619 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Robert Mack | Robert Mack | robertmackfilms@gmail.com | (310) 924 0204 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Robert Michael Troiano | Robert Michael Troiano | — | (760) 920 3304 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Robert Moline Electric | Robert William Moline | — | (818) 336 7507 | Electricians | Simi Valley · Ventura County | — | — |
| Robert Neil | Robert Neil | — | (805) 212 2111 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Robert Palacios Masonry INC | Robert Mark Palacios | — | (805) 732 6541 | Other | Simi Valley · Ventura County | — | — |
| Robert Pinkard Custom Tile | Robert Pinkard Custom Tile | — | (805) 663 9684 | Other | Newbury Park · Ventura County | — | — |
| Robert Quintero | Robert Quintero | — | (805) 210 9804 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Robert R Funston Communications | Robert R Funston Communications | — | (805) 207 8095 | Other | Ventura · Ventura County | — | — |
| Robert S Sung | Robert S Sung | — | (310) 961 0100 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Robert Taylor | Robert Taylor | — | (949) 355 9945 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Robert Walker Landscaping | Robert Walker Landscaping | — | (805) 526 7172 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Robert Williams | Robert Williams | — | (805) 229 7470 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| Robert's Plumbing | Robert's Plumbing | — | (818) 298 1344 | Other | Simi Valley · Ventura County | — | — |
| Robert's Pool Service | Robert Paul Mierop | — | (805) 428 1153 | Pool | Simi Valley · Ventura County | — | — |
| Roberto Cruz Celis | Roberto Cruz Celis | — | (805) 722 5105 | Electricians | Oxnard · Ventura County | — | — |
| Roberto H Hurtado | Roberto H Hurtado | — | (805) 499 5112 | Other | Newbury Park · Ventura County | — | — |
| Roberto Lara | Roberto Lara | info@robertolara.com | (805) 279 3193 | HVAC | Simi Valley · Ventura County | — | — |
| Robin Hallford Construction | Robin Ray Hallford | — | (818) 631 3380 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Robinson Construction | William Harrison Robinson | bill@robinson-construction.com | (805) 258 1646 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Robinson Construction | Donald Thomas Robinson | bill@robinson-construction.com | (805) 258-1646 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Robledo Heating & Air | Robledo Heating & Air | — | (805) 341 5955 | HVAC | Fillmore · Ventura County | — | — |
| Robles Custom Cabinets | Joaquin C Robles | — | (805) 527 3566 | Other | Santa Paula · Ventura County | — | — |
| Robles Roofing | Mario Jr Robles | — | (805) 248 0739 | Other roofers | Oxnard · Ventura County | — | — |
| Rock Bottom Granite & Remodeling | Rock Bottom Granite & Remodeling | — | (805) 584 8190 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Rock Hard Effex INC | Juan Manuel Rodriguez | — | (805) 558 5565 | Other | Simi Valley · Ventura County | — | — |
| Rockin B Ranch Co INC | Jonathan Thomas Magee | — | (805) 256 8332 | Other | Santa Paula · Ventura County | — | — |
| Rocky's Painting Company | Richard Allen Voigt | — | (805) 581 5411 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Rodan Heating & Air Conditioning INC | Daniel Cornel Sr Bates | — | (805) 499 4948 | HVAC | Camarillo · Ventura County | — | — |
| Rodarte Construction | Martin Guy Rodarte | — | (805) 616 6187 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Rodger H. Jones Construction | Rodger Howard Jones | — | (805) 910 9314 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Rodger's Roll-up Garage Doors | Rodger's Roll-up Garage Doors | — | (805) 642 1624 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Rodolph Nasr | Rodolph Nasr | — | (818) 200 3176 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Rodrigo Ramirez | Rodrigo Ramirez | a@rodrigoramirez.com | (805) 660 2094 | Other | Santa Paula · Ventura County | — | — |
| Rodriguez Construction | Rodriguez Alberto | — | (805) 890 8584 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Rodriguez Construction Group 805 | Marco Antonio Rodriguez | — | (805) 816 6688 | Other | Santa Paula · Ventura County | — | — |