| Janisse & Son INC | John Mitchell Janisse | — | (805) 795 3555 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Janisse Construction | John Mitchell Janisse | — | (760) 914 2975 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Jansma's Energy | Jansma's Energy | — | (808) 936 6750 | Electricians | Ojai · Ventura County | — | — |
| Jas Landscape LLC | Jesus Rosas Lopez | — | (805) 207 1594 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Jason C Bell DBA Advanced Plumbing Solutions | Advanced Plumbing Solutions | — | (805) 813 7277 | Other | Camarillo · Ventura County | — | — |
| Jason Gregory INC | Jason Wayne Gregory | — | (805) 432 0042 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Jason Medina Painting | Jason Medina Painting | — | (805) 896 6916 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Jason Ruble Sheet Metal | Jason Ruble Sheet Metal | — | (805) 630 0393 | Other | Newbury Park · Ventura County | — | — |
| Jason's Renovations | Jason's Renovations | — | (805) 256 5019 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Jasso Enterprises INC DBA Fairweather Heating And Air | Manuel David Jasso | — | (805) 520 0603 | HVAC | Simi Valley · Ventura County | — | — |
| Jasso Jordan | Jasso Jordan | — | (805) 857 2435 | Windows, patio, painters | Fillmore · Ventura County | — | — |
| Javier Junior Esqueda | Javier Junior Esqueda | — | (818) 983 8416 | Other | Simi Valley · Ventura County | — | — |
| Javier Melgarejo Flooring Installations | Javier Melgarejo Flooring Installations | — | (805) 421 9751 | Other | Oxnard · Ventura County | — | — |
| Javier P Delgadillo | Javier P Delgadillo | — | (818) 470 4103 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Javier's Construction INC | Javier Castellanos Godinez | — | (805) 278 7702 | Other | Oxnard · Ventura County | — | — |
| Jay R Hubbard Construction Co | Jay Ranton Hubbard | — | (805) 279 3043 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jay Scott Hansen | Jay Scott Hansen | — | (805) 551 5442 | HVAC | Westlake Village · Ventura County | — | — |
| Jayler Pitch INC | Jacob Tyler Pichel | assistant@jaylerpitch.com | (805) 229 1054 | Electricians | Ventura · Ventura County | — | — |
| Jaynes Brothers Construction INC | Dale Frederick Jaynes | — | (805) 375 1111 | GC, remodel, ADU | Newbury Park · Ventura County | — | — |
| Jb Garcia Plastering | Jb Garcia Plastering | bid@jbgarciaplastering.com | (805) 607 6838 | Other | Oxnard · Ventura County | — | — |
| Jb Garcia Plastering | Jesus Baez Garcia | bid@jbgarciaplastering.com | (805) 607 6838 | Other | Oxnard · Ventura County | — | — |
| Jb Pools INC | Justin Everett Burton | — | (805) 433 2746 | Pool | Simi Valley · Ventura County | — | — |
| Jb Selzer Construction | John Beck Selzer | — | (310) 486 1174 | Other | Ojai · Ventura County | — | — |
| Jbeazley Construction INC | Joseph David Beazley | — | (805) 628 6589 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Jbi Integration Solutions And Cabling INC | James Ernest Ray | — | (805) 587 8919 | Other | Simi Valley · Ventura County | — | — |
| Jc Centeno's Masonry INC | Jose Juan Centeno Costilla | — | (805) 217 3136 | Other | Oak View · Ventura County | — | — |
| Jc Concrete Works INC | Jacobo Carrillo | — | (805) 422 4967 | Other | Simi Valley · Ventura County | — | — |
| Jc Construction | Julio Cesar Camacho Sanchez | — | (805) 612 0077 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Jc Custom Rain Gutters INC | Juan Carlos Gutierrez | — | (661) 483 7991 | Other | Simi Valley · Ventura County | — | — |
| Jc Electric | Joshua James Chimarusti | — | (805) 746 6881 | Electricians | Ventura · Ventura County | — | — |
| Jc Tile | Jc Tile | — | (805) 758 2267 | Other | Santa Paula · Ventura County | — | — |
| Jct Construction INC | Castillo Torres Jorge | — | (805) 236 4536 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Jd & Sons Contracting | Oscar Delgado Aragon | — | (805) 758 3512 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Jdc Construction | Jack Lawrence Danelian | — | (818) 254 7037 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Jdh Construction INC | Jeffrey Dale Hawthorne | — | (805) 905 1574 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Jdmp INC | David Martinez Pacheco | — | (805) 428 9583 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Je & R Construction INC | Jose Adalberto Ruelas | info@jerconstruction.com | (805) 663 0042 | Other | Oxnard · Ventura County | — | — |
| Jeannie Painting | Jose Rosario Villa Reyes | — | (805) 298 2102 | Windows, patio, painters | Moorpark · Ventura County | — | — |
| Jeans Tile & Marble | Jeans Tile & Marble | — | (805) 490 5083 | Other | Camarillo · Ventura County | — | — |
| Jeff Allison Plumbing | Jeff Allison Plumbing | — | (818) 324 6334 | Other | Simi Valley · Ventura County | — | — |