| J B Builders | J B Builders | — | (805) 907 6380 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| J B Concrete Coatings | J B Concrete Coatings | — | (805) 432 1682 | Other | Camarillo · Ventura County | — | — |
| J B Jones Const | J B Jones Const | — | (818) 402 7322 | GC, remodel, ADU | Simi · Ventura County | — | — |
| J B Rain Gutters | J B Rain Gutters | — | (805) 603 6861 | Other | Ventura · Ventura County | — | — |
| J B S Air Conditioning And Plumbing Co | Michel Zarrabi | — | (805) 638 2097 | HVAC | Simi Valley · Ventura County | — | — |
| J Benitez Remodeling | J Benitez Remodeling | — | (805) 746 2218 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| J C Anderson Construction | John Charles Anderson | — | (805) 402 9361 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| J C Builders | Juan Carlos Gonzalez | — | (805) 375 3102 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| J C Castro Steel INC | Julio Cesar Castro | — | (818) 926 2246 | Other | Simi Valley · Ventura County | — | — |
| J C Construction | Jim Thomas Cortinez | — | (805) 218 7709 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| J C Engineering | J C Engineering | — | (805) 405 9441 | Other | Thousand Oaks · Ventura County | — | — |
| J C Floor Removal | Carlos Alberto Jara | hello@rfuenzalida.com | (805) 990 9605 | Other | Simi Valley · Ventura County | — | — |
| J C I Construction INC | Jose Jimmy Osorio | — | (805) 905 9224 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| J C Iron & Mfg Co | Jose Concepcion Favela | — | (805) 487 5676 | Other | Oxnard · Ventura County | — | — |
| J C L Heating & Air Conditioning INC | Marco Antonio Renteria | — | (661) 678 3993 | HVAC | Fillmore · Ventura County | — | — |
| J C Quality Carpentry INC | Marcos Cisneros-Magana | — | (805) 290 2392 | GC, remodel, ADU | Santa Paula · Ventura County | — | — |
| J C's Professional Painters INC | Gramont Annegret | — | (805) 368 9884 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| J Christian Geckle Construction Company | Jeffery Christian Geckle | — | (805) 217 7276 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| J Construction | Jose Juan Guzman | — | (805) 750 6454 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| J Construction & Project Management | Michael Jerome Johnson | — | (844) 777 5266 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| J Cook | J Cook | — | (805) 551 0631 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| J Cooke Construction INC | Jeffrey Aaron Cooke | hello@jcookeconstruction.com | (805) 371 7980 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| J Cruz And Sons Painting | J Cruz And Sons Painting | — | (805) 297 7411 | Windows, patio, painters | Simi Valley · Ventura County | — | — |
| J D M Designs | Joel David Matthews | — | (805) 583 3276 | Electricians | Simi Valley · Ventura County | — | — |
| J D M Plumbing Specialist INC | Barroso David | — | (805) 658 8668 | Other | Santa Paula · Ventura County | — | — |
| J Davis Construction Management INC DBA J D C M Roofing | Jonathan Michael Davis | — | (805) 650 0591 | Other roofers | Oxnard · Ventura County | — | — |
| J F & Son Construction Corporation | John Alan Ferrante | — | (805) 496 9255 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| J F Construction | Francisco Mendez Navarrete | — | (805) 383 2382 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| J F D Hardwood Floors | J F D Hardwood Floors | — | (818) 307 0384 | Other | Simi Valley · Ventura County | — | — |
| J F K Pavestone INC | John Frank Koladziej | — | (805) 577 9507 | Other | Simi Valley · Ventura County | — | — |
| J Ford Construction | Joshua Anthony Fran Ford | — | (805) 340 1699 | HVAC | Ventura · Ventura County | — | — |
| J G R Landscaping Services | Garcia Rangel Juan | — | (805) 416 9797 | Windows, patio, painters | Moorpark · Ventura County | — | — |
| J G Tile & Marble | J G Tile & Marble | — | (805) 479 2140 | Other | Oxnard · Ventura County | — | — |
| J Hub Construction INC | James Michael Hubbard | — | (805) 390 5927 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| J J Pop Enterprises | Jerzy Stanislaw Poprawski | — | (805) 987 9186 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| J K Electric | Jonn Tayler | — | (805) 813 2750 | Electricians | Susana Knolls · Ventura County | — | — |
| J K F Construction INC | Jon Kevin Flugum | — | (805) 583 4228 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| J K F Enterprises | Jon Kevin Flugum | — | (805) 583 4228 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| J K Plumbing | J K Plumbing | — | (805) 551 8742 | Other | Simi Valley · Ventura County | — | — |
| J K S Construction / Backhoe Service | Kirk Wayne Hyatt | — | (805) 207 5489 | Other | Ojai · Ventura County | — | — |