| R C Construction | Ryan Paul Cerny | — | (805) 559 7344 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| R C Drilling INC | Richard Wayne Jr Chandler | emailharlsan@harlsan.com.au | (805) 907 1721 | Other | Thousand Oaks · Ventura County | — | — |
| R D C Custom Painting | R D C Custom Painting | — | (805) 501 4160 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| R D Freas | R D Freas | — | (805) 501 4196 | Other | Simi Valley · Ventura County | — | — |
| R D Tracy Painting | R D Tracy Painting | — | (805) 824 3038 | Windows, patio, painters | Ventura · Ventura County | — | — |
| R Davis Construction | Robert Cody Davis | — | (805) 207 6177 | Other | Ojai · Ventura County | — | — |
| R E Mccoy Company | Curt Dale Mc Coy | — | (818) 764 2101 | Other | Simi Valley · Ventura County | — | — |
| R F Mechanical Services | Ronald Lee Fazzolare | rfmechanicalservices@outlook.com.au | (805) 523 8230 | HVAC | Moorpark · Ventura County | — | — |
| R G Construction | Randy Erwin Getchius | — | (805) 526 7595 | Electricians | Simi Valley · Ventura County | — | — |
| R G Drywall And Builder | R G Drywall And Builder | — | (805) 890 1040 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| R G Electric | Karen Beth Finkel | impallari@gmail.com | (818) 706 0032 | Electricians | Thousand Oaks · Ventura County | — | — |
| R G Electrical Co INC | Ramon Arroyo Gonzalez | — | (805) 791 7237 | Electricians | Simi Valley · Ventura County | — | — |
| R G England Plumbing Company INC | Robert Gregory England | rgengland1@yahoo.com | (805) 432-8080 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| R G S Fire Protection | R G S Fire Protection | — | (805) 320 4947 | Other | Ventura · Ventura County | — | — |
| R G Wells Plumbing | R G Wells Plumbing | — | (805) 646 1131 | Other | Ojai · Ventura County | — | — |
| R H Enterprises | Robin Rose Hober | — | (805) 798 0201 | Windows, patio, painters | Ventura · Ventura County | — | — |
| R H Handyman & General Contracting | Robert Eugene Henson | — | (805) 512 3988 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| R H I Construction | Laureano Topete | — | (805) 988 2220 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| R Heiller Construction INC | Richard John Heiller | — | (805) 823 5285 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| R Help Construction Company INC | Roberto Hurzar Hurtado | — | (805) 499 5112 | Other | Newbury Park · Ventura County | — | — |
| R Horne Hearth And Home | R Horne Hearth And Home | — | (805) 450 2403 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| R I Design & Construction | Ruben Aurelio Carmona | — | (805) 604 9409 | HVAC | Oxnard · Ventura County | — | — |
| R J Action Painting INC | Ramon Alberto Juarez | — | (805) 680 7251 | Windows, patio, painters | Ventura · Ventura County | — | — |
| R J C Masonry | R J C Masonry | — | (805) 407 0030 | Other | Santa Paula · Ventura County | — | — |
| R J Flooring | R J Flooring | — | (805) 710 4780 | Other | Camarillo · Ventura County | — | — |
| R J G Construction Company INC | Cynthia Louise Drake | — | (805) 526 1384 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| R J M Construction Company | Raymond Jr Ming | — | (805) 727 0942 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| R J Paul Construction | Richard James Paul | — | (818) 404 4091 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| R K M Road Maintenance INC | Rebecca Kristine Miller | — | (805) 732 5055 | Other | Ventura · Ventura County | — | — |
| R K Mechanical | R K Mechanical | — | (805) 428 1207 | HVAC | Simi Valley · Ventura County | — | — |
| R L D Fire Protection INC | Roy Jacob Lee | — | (805) 625 2518 | Other | Ventura · Ventura County | — | — |
| R L Electric INC | Rick Lee Leidner | — | (805) 501 7870 | Electricians | Simi Valley · Ventura County | — | — |
| R Lord Construction | Robert Vincent Lord | — | (805) 256 5270 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| R M C Roofing | Robert Garcia | debbiegarcia@rmcroofing.com | (805) 485 3030 | Other roofers | Oxnard · Ventura County | — | — |
| R M D Construction | Antonio Gonzalez Soto | — | (310) 713 2126 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| R M J Construction | Ryan Michael Jantzen | — | (805) 338 0145 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| R M Landworks INC | Macias Ricardo | — | (805) 827 8002 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| R M Quality Drywall | Chavez Mendoza Rigoberto | — | (805) 760 5252 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| R M Targoni Finish Carpentry | R M Targoni Finish Carpentry | — | (805) 455 9162 | Other | Ventura · Ventura County | — | — |
| R Mc Kean Construction Company INC | Robert Gene Mc Kean | — | (805) 340 2925 | Other | Ventura · Ventura County | — | — |