| Q2 Construction Co | Richard Alan Kiuttu | — | (805) 630 1569 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Quality Ag INC | Mike Todd Richardson | ebeatty@qualityag.com | (641) 680-6186 | Other | Fillmore · Ventura County | — | — |
| Quality Carpet And Flooring | Quality Carpet And Flooring | — | (805) 857 4110 | Other | Simi Valley · Ventura County | — | — |
| Quality Comfort Heating & Air Conditioning | Luis Alberto Mendoza | — | (805) 612 0238 | HVAC | Oxnard · Ventura County | — | — |
| Quality Construction | Bhola Amin | — | (805) 583 1013 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Quality Construction & Painting | William Edwin Bigler | — | (805) 650 0800 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Quality Cross Pool & Spa Service | Eric Phillip Cross | — | (805) 381 1819 | Pool | Thousand Oaks · Ventura County | — | — |
| Quality Homes Renovation INC | Allen Ernest Iii Kroger | — | (805) 391 0607 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Quality Paving | Douglas Truman Smith | — | (805) 650 0123 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Quality Plumbing | Quality Plumbing | — | (805) 659 2662 | Other | Ventura · Ventura County | — | — |
| Quality Tech Construction INC | Gabriel Guerra | — | (805) 857 2480 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Quality Terra Services | Jose Cruz Calderon | — | (805) 844 9685 | Other | Oxnard · Ventura County | — | — |
| Quality Tile Marble & Stone | Quality Tile Marble & Stone | — | (818) 517 5280 | Other | Simi Valley · Ventura County | — | — |
| Quality Windows | Quality Windows | — | (805) 654 0154 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Quality Windows & Doors | Quality Windows & Doors | info@qualitywindows-doors.com | (805) 635-2805 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Quality Windows INC | Erick Dwight Karlsen | — | (805) 654 0154 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Queen Rivers Concrete INC | Martin Eduardo Rios | — | (805) 422 2216 | Other | Simi Valley · Ventura County | — | — |
| Quick Plumbing Co Of Camarillo | Randy Clay Teunis | — | (805) 469 5215 | Other | Camarillo · Ventura County | — | — |
| Quick Response Plumbing & Drain Cleaning LLC | Robert Charles Snyder | — | (805) 896 2937 | Other | Ventura · Ventura County | — | — |
| Quick Restore LLC | Elizabeth Wynn De Luca | — | (805) 906 1011 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Quick Turn Maintenance | James Anthony Oliva | — | (805) 600 8881 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Quirk Casework Installations INC | Douglas Lawrence Quirk | — | (805) 490 8710 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| R & D Painting | R & D Painting | — | (805) 526 1600 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| R & H Waterproofing And Deck Coating | Richard Lee Hefner | — | (805) 522 2637 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| R & R Construction Company | Roman Correa | — | (805) 232 8387 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| R & R Construction LLC | Roman Correa | — | (805) 232 8387 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| R & R Demo And Grading Corp | Bahram Rabii | — | (805) 667 8094 | Other | Ventura · Ventura County | — | — |
| R & R Elite Builders INC | Richard Wesley Sr Herman | — | (805) 233 8024 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| R & R Finish Work | R & R Finish Work | — | (805) 582 0428 | Other | Simi Valley · Ventura County | — | — |
| R & R Fire Protection INC | Rick Michael Rodarte | contact@rrfireprotection.com | (805) 654 0922 | Other | Ventura · Ventura County | — | — |
| R & R Palacios Construction INC | Ron Palacios | — | (805) 857 1969 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| R & R Pipeline Incorporated | Donovan L Elliott | — | (805) 933 9111 | Other | Santa Paula · Ventura County | — | — |
| R & R Tile | R & R Tile | — | (805) 312 6600 | Other | Camarillo · Ventura County | — | — |
| R & S Construction | Ruben Jr Navarrete | — | (805) 990 5883 | Other | Fillmore · Ventura County | — | — |
| R & S Painting Contractors | Todd Kenneth Rhoads | — | (805) 794 2989 | Windows, patio, painters | Ventura · Ventura County | — | — |
| R A Atmore & Sons INC | Richard Allen Jr Atmore | — | (805) 644 6851 | Other | Ventura · Ventura County | — | — |
| R A Goode Drywall | R A Goode Drywall | — | (805) 207 7579 | Other | Ojai · Ventura County | — | — |
| R B Construction | Ray Gordon Bathauer | — | (805) 990 3922 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| R B Construction | Ralph Edwin Barnes | — | (805) 746 2401 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| R B Custom Cabinets | R B Custom Cabinets | — | (818) 943 4610 | Other | Simi Valley · Ventura County | — | — |