| Build Your Dreams Construction | Larry Chris Moraga | — | (805) 391 2027 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Builders Avenue | Jennifer Olais Maranan | — | (818) 388 6853 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Builders Doc INC | Jerry Allen Kirkendall | info@buildersdoc.com | (805) 657 4958 | Other roofers | Thousand Oaks · Ventura County | — | — |
| Builders Firstsource Window & Door Showroom | Builders Firstsource Window & Door Showroom | — | (805) 648-3667 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Building Envelope Roofing | Matthew Machen Bancroft | — | (805) 273 6629 | Other roofers | Simi Valley · Ventura County | — | — |
| Building With Integrity INC | Kristina Michelle Roach | — | (805) 558 4647 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Built Rite Construction | Steve Michael Okamoto | — | (805) 443 8891 | GC, remodel, ADU | Port Hueneme · Ventura County | — | — |
| Bull Dog Electric INC | Eric Alan Norris | office@bulldogelectric.com | (707) 548 9090 | Electricians | Hidden Valley · Ventura County | — | — |
| Bulldog Plumbing & Rooter Corp | Jorge Martinez Ramirez | — | (805) 850 2005 | Other | Oxnard · Ventura County | — | — |
| Bumble Roofing Of Ventura County | Ryan David Meuse | — | (805) 501 2975 | Other roofers | Ventura · Ventura County | — | — |
| Burchell Construction | Richard Allen Burchell | — | (805) 758 5515 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Burg Construction | Brian Scott Burg | — | (805) 701 0668 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Burke Overhead Door & Gate Of Ventura | Andrew Ardell Burke | — | (805) 477 8090 | Other | Ventura · Ventura County | — | — |
| Burke-power Electrical Service | Dennis Craig Burke | — | (805) 647 6206 | Electricians | Ventura · Ventura County | — | — |
| Burlingame Brothers Electric INC | Anthony John Jr Moreali | — | (818) 355 7602 | Electricians | Westlake Village · Ventura County | — | — |
| Burman Built Construction | Casey Owen Burman | — | (805) 896 3727 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Burns Construction Services LLC | Nicholas Michael Burns | — | (805) 758 2303 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Burns Equipment Services INC | Michael James Burns | info@burnsequipmentservices.com | (805) 672 0421 | Other | Ventura · Ventura County | — | — |
| Burns-pacific Construction INC | Michael Anthony Moraga | — | (805) 371 4171 | Other | Newbury Park · Ventura County | — | — |
| Burpees Plumbing & Rooter | Michael Ryan Burpee | — | (818) 317 2130 | HVAC | Simi Valley · Ventura County | — | — |
| Burton House Repair | Burton House Repair | — | (805) 584 0452 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Busy Bee Painting | Busy Bee Painting | — | (805) 444 1338 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Butayi Painting & Decorating | Butayi Painting & Decorating | — | (805) 689 0200 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Buzz's Shower Pan's | Buzz's Shower Pan's | — | (805) 522 8250 | Other | Newbury Park · Ventura County | — | — |
| By The Foot LLC | Brian David Peters | — | (818) 808 3949 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Byrd Electrical Contractors INC | James Durley Byrd | — | (805) 650 7324 | Electricians | Ventura · Ventura County | — | — |
| C & B Heating & Air Conditioning | Patrick Michael Piper | — | (818) 324 2856 | HVAC | Simi Valley · Ventura County | — | — |
| C & B Maintenance | C & B Maintenance | — | (805) 218 2299 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| C & C Construction Co | Carmine John Prizzi | — | (805) 207 9635 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| C & C Remodeling | C & C Remodeling | — | (805) 654 1266 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| C & H Construction | Jeffrey Allan Jay | — | (805) 495 0679 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| C & J Development Co | Cary Reynold Klein | — | (805) 389 3156 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| C & J Painting Corp | Claudia Perez | — | (805) 843 4409 | Windows, patio, painters | Ventura · Ventura County | — | — |
| C & M Backflow Plumbing INC | Celso Rascon Mata | — | (805) 443 7451 | Other | Oxnard · Ventura County | — | — |
| C & R Heating And Air Conditioning | James Joseph Keelan | — | (805) 987 6004 | HVAC | Somis · Ventura County | — | — |
| C & W Construction Specialties INC | Steven John Bennett | — | (805) 642 0204 | Other | Ventura · Ventura County | — | — |
| C - Street Refrigeration | C - Street Refrigeration | — | (805) 431 4411 | HVAC | Thousand Oaks · Ventura County | — | — |
| C 3 G Construction INC | Jason Wade Williams | — | (805) 559 5356 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| C A M A C O | Martin Carlos | — | (805) 320 7263 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| C And E Solutions | C And E Solutions | — | (805) 732 5711 | Other | Simi Valley · Ventura County | — | — |