| Jesse Poupis | Jesse Poupis | — | (818) 808 9916 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jesse Ramirez Tile Company | Jesse Ray Ramirez | — | (808) 840 9332 | Other | Santa Paula · Ventura County | — | — |
| Jessie Flores Landscape Co | Jesus Antonio Flores | — | (818) 634 1181 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Jesus Eugenio Fregoso | Jesus Eugenio Fregoso | — | (805) 201 8713 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Jesus Gurrola | Jesus Gurrola | — | (805) 428 5104 | Other | Simi Valley · Ventura County | — | — |
| Jesus Jaime Torres | Jesus Jaime Torres | — | (805) 422 1280 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jesus Morones | Jesus Morones | — | (805) 512 0443 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Jetoc Construction Company INC | James Francis Cote | — | (805) 386 3503 | Other | Somis · Ventura County | — | — |
| Jfc Plumbing INC | John Franklin Cuccia | — | (805) 443 5108 | Other | Westlake Village · Ventura County | — | — |
| Jg Construction Cal | Jose Jesus Guzman Perez | — | (805) 424 7793 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jg Construction Services | Joshua James Glassman | — | (760) 213 5721 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jg Plastering And Sons INC | Joseph Florence Garcia | — | (805) 298 2932 | Other | Santa Paula · Ventura County | — | — |
| Jh Color Design Corporation | Josue Herrera | — | (818) 402 9088 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Jh3 Company | Thomas David Harris | — | (805) 375 1157 | Other roofers | Newbury Park · Ventura County | — | — |
| Jim Gill Flooring INC | James Allan Gill | — | (805) 650 6391 | Other | Ventura · Ventura County | — | — |
| Jim Stecker | Jim Stecker | — | (805) 279 4117 | Other | Simi Valley · Ventura County | — | — |
| Jingchao Sun | Jingchao Sun | — | (805) 201 8818 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Jj Pro Construction INC | Leon Guillermo Rodriguez | — | (805) 889 7242 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Jjc Building Contractor | Jonathan Isaiah Johnson | — | (805) 910 9713 | Other roofers | Moorpark · Ventura County | — | — |
| Jjr Builders INC | Joshua Jay Rider | — | (818) 599 2984 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jlf Development INC | Jason Luis Fernandez | — | (818) 304 6931 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Jlf Tub And Tile Reglazing | Jason Luis Fernandez | — | (818) 722 2377 | Other | Simi Valley · Ventura County | — | — |
| Jm Drywall INC | Javier Alejandro Jr Mendez | — | (805) 981 0808 | Other | Camarillo · Ventura County | — | — |
| Jm Overhead Door INC | James Donald Meltzer | — | (805) 647 3970 | Other | Ventura · Ventura County | — | — |
| Jm Painting | Jm Painting | — | (805) 216 8682 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Jmac Communities INC | Craig Stuart Mattey | — | (808) 221 5553 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Jmar INC | Jon Lyndsey Marks | — | (805) 484 5595 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Jmc Construction Service INC DBA K And J Construction | Jeremy Mason Cooper | — | (805) 509 9439 | GC, remodel, ADU | Port Hueneme · Ventura County | — | — |
| Jml Construction | Jason Michael Lowe | brian@jmlconstruction.com | (573) 429-4962 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Joaquin Martinez Flooring | Joaquin Martinez Flooring | — | (805) 647 5604 | Other | Ventura · Ventura County | — | — |
| Joaquin Osuna | Joaquin Osuna | — | (805) 843 0026 | HVAC | Oxnard · Ventura County | — | — |
| Joaquin Valle | Joaquin Valle | — | (805) 636 4967 | Electricians | Ojai · Ventura County | — | — |
| Joe B's Plumbing | Joe B's Plumbing | — | (805) 558 9387 | Other | Oxnard · Ventura County | — | — |
| Joe Iniguez Landscape Experts | Joe Iniguez Landscape Experts | — | (805) 890 8585 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Joe Kapp Real Estate Inc. | Joe Kapp Real Estate Inc. | — | (805) 648-9900 | Property managers | Ventura · Ventura County | — | — |
| Joe Luis Murillo | Joe Luis Murillo | — | (805) 947 9289 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Joe Mc Cormick Construction INC DBA Mc Cormick Construction | Joseph Spriggs Mc Cormick | — | (805) 732 4520 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Joe Rice Construction Services | Joseph Edward Rice | — | (805) 377 2324 | GC, remodel, ADU | Somis · Ventura County | — | — |
| Joel G Flores Construction | Joel Guzman Flores | — | (805) 966 3392 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Joel Pena Painting | Joel Pena Painting | — | (805) 358 8172 | Windows, patio, painters | Oxnard · Ventura County | — | — |