| John's Heating & AC Repair Ventura | John's Heating & AC Repair Ventura | — | (805) 691-2508 | HVAC | Ventura · Ventura County | — | — |
| Johnson Construction | Dustin Gary Johnson | — | (805) 551 4612 | GC, remodel, ADU | Ventura · Ventura County | — | — |
| Johnson Fine Finishes And Painting INC | Michael Brian Johnson | — | (805) 689 3623 | Windows, patio, painters | Santa Paula · Ventura County | — | — |
| Johnson Heating And Air Conditioning | Johnson Heating And Air Conditioning | — | (805) 455 7757 | HVAC | Ventura · Ventura County | — | — |
| Johnston Plumbing | Johnston Plumbing | interested@domainmarket.com | (805) 258 9943 | Other | Oak View · Ventura County | — | — |
| Jon Cotham Construction DBA Healthy Eco Homes | Healthy Eco Homes | — | (805) 208 2598 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Jon Goldstein | Jon Goldstein | — | (818) 201 4462 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Jon R Hughes | Jon R Hughes | — | (310) 994 0590 | GC, remodel, ADU | Westlake Village · Ventura County | — | — |
| Jon Vanlandingham Construction | Jonathan Hale Vanlandingham | — | (805) 824 6720 | GC, remodel, ADU | Camarillo · Ventura County | — | — |
| Jonatan Castillo | Jonatan Castillo | — | (805) 358 2699 | Electricians | Thousand Oaks · Ventura County | — | — |
| Jonathan Barbey | Jonathan Barbey | — | (805) 824 4869 | Other | Camarillo · Ventura County | — | — |
| Jonathan Dinkel Construction | Jonathan Peter Dinkel | — | (805) 732 7346 | GC, remodel, ADU | Thousand Oaks · Ventura County | — | — |
| Jonathan Gonzalez | Jonathan Gonzalez | — | (805) 794 8790 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Jonathan's Tile And Construction Services | Jonathan Brian Friedman | — | (805) 443 3843 | GC, remodel, ADU | Moorpark · Ventura County | — | — |
| Jones & Jones Construction | Cameron Francis Jones | — | (805) 640 3050 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Jones Construction Company | Cary Morris Jones | — | (805) 857 3726 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Jonnydo LLC | John Francis Sankey | hello@jonnydo.com | (831) 247 6175 | GC, remodel, ADU | Ojai · Ventura County | — | — |
| Jordan A Walters | Jordan A Walters | — | (805) 896 7482 | Other | Ventura · Ventura County | — | — |
| Jordan And Sons Incorporated | Randy Lee Jordan | — | (805) 797 7256 | Electricians | Ventura · Ventura County | — | — |
| Jordan Electrical Construction Company | Randy Lee Jordan | — | (805) 797 7256 | Electricians | Oxnard · Ventura County | — | — |
| Jordan Equipment | Jordan Equipment | — | (818) 620 1157 | Other | Thousand Oaks · Ventura County | — | — |
| Jordan Landscape Company | Brian Robert Jordan | — | (805) 889 4830 | Windows, patio, painters | Camarillo · Ventura County | — | — |
| Jordan Mellett Construction INC | Jordan Anthony Mellett | — | (805) 856 8151 | GC, remodel, ADU | Oak View · Ventura County | — | — |
| Jordan's Hardwood Floors INC | Steven Allen Jordan | — | (805) 671 9833 | Other | Ventura · Ventura County | — | — |
| Jordan's Painting | Jordan's Painting | — | (224) 283 1618 | Windows, patio, painters | Oxnard · Ventura County | — | — |
| Jorge Guzman | Jorge Guzman | — | (805) 231 6259 | Other | Ventura · Ventura County | — | — |
| Jorge L Salinas | Jorge L Salinas | — | (805) 746 8603 | Tree | Oxnard · Ventura County | — | — |
| Jorge Ramirez | Jorge Ramirez | — | (805) 628 0256 | Other | Santa Paula · Ventura County | — | — |
| Jose A Serratos | Jose A Serratos | — | (818) 987 1654 | Other | Simi Valley · Ventura County | — | — |
| Jose Alfredo Avila Electric | Jose Alfredo Avila | — | (805) 651 9553 | Electricians | Ventura · Ventura County | — | — |
| Jose Armando Martinez De Jesus | Jose Armando Martinez De Jesus | — | (805) 414 1524 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Jose Castro Painting | Jose Castro Painting | — | (805) 496 8357 | Windows, patio, painters | Thousand Oaks · Ventura County | — | — |
| Jose Gutierrez Floor Covering | Jose Gutierrez Floor Covering | — | (805) 340 5545 | Other | Oxnard · Ventura County | — | — |
| Jose Ignacio Castellanos | Jose Ignacio Castellanos | — | (805) 509 6668 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Jose Luis Samano | Jose Luis Samano | — | (805) 387 0407 | Pool | Moorpark · Ventura County | — | — |
| Jose Ramon Jimenez | Jose Ramon Jimenez | — | (805) 628 3805 | Windows, patio, painters | Ventura · Ventura County | — | — |
| Jose's Landscape Services | Jose Rodriguez Barragan | — | (805) 443 3817 | GC, remodel, ADU | Oxnard · Ventura County | — | — |
| Jose's Plumbing And Rooter | Jose's Plumbing And Rooter | admin@jprooter.com | (805) 331 7511 | Other | Santa Paula · Ventura County | — | — |
| Joseph Alfaro Construction | Joseph De Guadalupe Alfaro | — | (818) 943 8942 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |
| Joseph Anthony Cocita | Joseph Anthony Cocita | — | (818) 207 8488 | GC, remodel, ADU | Simi Valley · Ventura County | — | — |