| Jnj Carpet And Linda INC | Jose N Jovel Lopez | — | (626) 820 3768 | Other | Hemet · Riverside County | — | — |
| Jnj Floor Covering INC | Garcia Fausto Hernandez | — | (323) 359 4039 | Other | Perris · Riverside County | — | — |
| Joan Ramirez | Joan Ramirez | — | (951) 565 0517 | Other | Riverside · Riverside County | — | — |
| Jobra Wiring Solutions INC | Rogelio Jonathan Vargas | — | (714) 851 2447 | Other | Riverside · Riverside County | — | — |
| Jodi Bachor | Jodi Bachor | — | (951) 682 8111 | Other | Riverside · Riverside County | — | — |
| Jody T Alvarez | Jody T Alvarez | — | (760) 329 4170 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Joe Anthony Flores | Joe Anthony Flores | — | (951) 903 4730 | Electricians | Moreno Valley · Riverside County | — | — |
| Joe Barbeau Construction | Joseph Henry Barbeau | — | (949) 413 6500 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Joe Barth Construction INC | Joseph Gregory Barth | — | (951) 751 0283 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| Joe Bertine | Joe Bertine | — | (951) 436 8724 | Electricians | Menifee · Riverside County | — | — |
| Joe Construction And Remodeling INC | Julian Cablayan Decierdo | — | (760) 469 7222 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Joe Diaz Construction | Joseph Anthony Diaz | — | (951) 691 7812 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Joe La Buda Construction | Joseph Warren La Buda | — | (951) 789 0963 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Joe Lloyd's Complete Home And Office | Lloyd Joseph | — | (949) 292 6965 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Joe Medina | Joe Medina | — | (951) 496 2215 | Other | Perris · Riverside County | — | — |
| Joe Nasr Construction | Joseph Raymond Nasr | — | (310) 866 6645 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Joe Paino | Joe Paino | — | (951) 317 7484 | Other | Riverside · Riverside County | — | — |
| Joe Tile & Marble | Joe Tile & Marble | — | (818) 472 5192 | Other | Murrieta · Riverside County | — | — |
| Joe W Stemmer Jr | Joe W Stemmer Jr | — | (760) 880 3525 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Joe's Tree Care | Joe's Tree Care | kingstreeservice03@gmail.com | (626) 221 6471 | Tree | Mira Loma · Riverside County | — | — |
| Joel Electric INC | Lane Stuart Joel | — | (951) 769 4941 | Electricians | Beaumont · Riverside County | — | — |
| Joel Nagel | Joel Nagel | — | (951) 712 0573 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Joel Wilging | Joel Wilging | — | (951) 288 9441 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Joel's Air Conditioning | Joel's Air Conditioning | — | (951) 201 7226 | HVAC | Hemet · Riverside County | — | — |
| Joelco | Herrera Joel | — | (760) 699 4256 | GC, remodel, ADU | White Water · Riverside County | — | — |
| Joey Lanza Painting INC | Joseph Kenneth Lanza | jlppaintinginc@yahoo.com | (951) 760 9373 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Joey's Plumbing INC | Jose Jr Coronado | — | (760) 774 8747 | Other | Indio · Riverside County | — | — |
| John Anthony & Associates | John Anthony Hinojosa | john@johnanthonyassociates.com | (760) 578 6441 | GC, remodel, ADU | Indio · Riverside County | — | — |
| John Anthony Adams Ii | John Anthony Adams Ii | — | (951) 367 8304 | Other | Moreno Valley · Riverside County | — | — |
| John Armenta | John Armenta | — | (714) 715 0891 | Electricians | Corona · Riverside County | — | — |
| John Austin INC DBA Best Tec | Valerie Mattson Dombrowski | — | (760) 328 0021 | HVAC | Palm Desert · Riverside County | — | — |
| John Ayala Electric INC | John Carlos Ayala | — | (760) 774 6168 | Electricians | Desert Hot Springs · Riverside County | — | — |
| John B Velarde | John B Velarde | — | (951) 852 7427 | GC, remodel, ADU | Perris · Riverside County | — | — |
| John Barajas Masonry | John Barajas Masonry | — | (760) 345 3912 | Other | Bermuda Dunes · Riverside County | — | — |
| John Bettencourt Pool Service INC | John Starr Bettencourt | — | (951) 306 7999 | Pool | Hemet · Riverside County | — | — |
| John Bradley | John Bradley | — | (760) 500 2244 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| John Brantner | John Brantner | — | (951) 204 4686 | Windows, patio, painters | Beaumont · Riverside County | — | — |
| John Bruce Slingerland | John Bruce Slingerland | — | (951) 205 1281 | Electricians | Lake Elsinore · Riverside County | — | — |
| John Buck | John Buck | — | (909) 292 6998 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| John C Stafford Construction | John Chessman Stafford | — | (619) 787 1602 | GC, remodel, ADU | Hemet · Riverside County | — | — |