| Big Red's Marble & Tile INC | Mario C Gallegos | — | (818) 232 1748 | Other | Simi Valley · Ventura County | — | — |
| Big Sky Plumbing | Big Sky Plumbing | — | (805) 368 2539 | Other | Simi Valley · Ventura County | — | — |
| Big Time Construction 1971 INC | Guy Levanon | — | (818) 640 7682 | GC, remodel, ADU | Port Hueneme · Ventura County | — | — |
| Big Tree Landworks INC | Emilio Gomez | — | (805) 754 9378 | Windows, patio, painters | Piru · Ventura County | — | — |
| Big Vali INC | Kenneth Leslie Butler | — | (800) 746 2960 | HVAC | Simi Valley · Ventura County | — | — |
| Bigfoot Construction | Kyle Thomas Mcconnell | — | (616) 485 5722 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Bigs Construction | Geoffrey William Bigley | bigsconstruction603@gmail.com | (805) 279 8209 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Bilchik Design And Construction | Jonathan Andrew Bilchik | — | (818) 262 0511 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Bill And C J Steel Work | William Ernesto Aguirre | — | (818) 581 6501 | Other | Santa Paula · Ventura County | — | — |
| Bill Brown Pool Service | William Thomas Brown | — | (818) 891 6308 | Pool | Simi Valley · Ventura County | — | — |
| Bill Davis Drywall INC | William Michael Davis | — | (805) 984 9435 | Other | Oxnard · Ventura County | — | — |
| Bill Gearhart Pool Service | William Earl Gearhart | — | (805) 231 5741 | Pool | Simi Valley · Ventura County | — | — |
| Bill Graves DBA Blue Sky Construction Co | William Robert Graves | — | (310) 600 3134 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Bill Morris Contracting INC | William Joseph Jr Morris | — | (805) 302 9575 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Bill's Plumbing | Bill's Plumbing | — | (805) 421 8083 | Other | Fillmore · Ventura County | — | — |
| Bill's Pool Services | Bill's Pool Services | — | (805) 643-0266 | Pool | Ventura · Ventura County | — | — |
| Billups Construction | William Courtney Billups | — | (805) 890 4080 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Biltmore Design Builders | Biltmore Design Builders | — | (805) 210 1618 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Bird Pacific Incorporated | Larry Lee Spencer | — | (805) 486 4628 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Bitav Construction Co | Tomas Salas Rodriguez | — | (805) 750 6051 | GC, remodel, ADU | Fillmore · Ventura County | — | — |
| Bj & K Renovations LLC | Brandon Jay Decklever | — | (805) 256 5161 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Bjork Plumbing INC | Ethan Edwin George Bjork | — | (805) 376 9533 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Bjorn Erik Zetterberg | Bjorn Erik Zetterberg | — | (805) 341 4673 | GC, remodel, ADU | Lake Sherwood · Ventura County | — | — |
| Bkm Office Environments INC | Peter Allan Sloan | — | (805) 339 6388 | HVAC | Camarillo · Ventura County | — | — |
| Black & White Electrical | Ramiro Alcantar Albarran | — | (805) 947 8669 | Electricians | Thousand Oaks · Ventura County | — | — |
| Black Diamond Roofing | Francisco Ricardo Conchas Orozco | — | (805) 394 9601 | Other roofers | Oxnard · Ventura County | — | — |
| Black Gold Industries | Victor Jean Jacques Villard | — | (805) 981 4616 | Other | Oxnard · Ventura County | — | — |
| Black Magic Metal Art INC | Nathan Ronald Hentges | — | (805) 210 1154 | Other | Oxnard · Ventura County | — | — |
| Blackbelt Drywall Finishes | Blackbelt Drywall Finishes | — | (805) 978 7545 | Other | Ojai · Ventura County | — | — |
| Blackout Environmental INC DBA Blackout Construction | Andrew Ignacio Montez | — | (805) 827 8458 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Blackpointe Group Construction & Management INC | Victor Anthony Schittone | — | (888) 707 4474 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Bladimir F Castro DBA C & C Painting | C & C Painting | — | (805) 758 8277 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| Blaine Construction And Home Renovation | Erik David Blaine | — | (818) 939 3513 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Blair's Pool & Spas INC | Ronald Lavoy Blair | — | (805) 746 4700 | Pool | Santa Paula · Ventura County | — | — |
| Blair's Pools And Spas | Blair's Pools And Spas | — | (805) 746 4700 | Pool | Santa Paula · Ventura County | — | — |
| Blanchard Roofing INC | Brian Blanchard | — | (805) 641 1914 | Other roofers | Ventura · Ventura County | — | — |
| Blaze Blockers LLC | Geoffrey Ryan Ozima | blazeblockersllc@gmail.com | (714) 357 2945 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Blend Technology | Powers Jimmy | — | (805) 624 6543 | Other | Simi Valley · Ventura County | — | — |
| Blessed Construction | Jose Javier Elisalde Parra | — | (805) 404 5473 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Blicknson | John Joseph Blick | — | (805) 217 8763 | GC, remodel, ADU | Moorpark · Ventura County | — | — |