| J & A Plumbing Solutions | J & A Plumbing Solutions | — | (760) 600 4404 | Other | Indio · Riverside County | — | — |
| J & A Structures INC | Andrea Lopez | — | (951) 393 0130 | Other | Corona · Riverside County | — | — |
| J & D Metal LLC | Joey Siglar | — | (951) 813 5431 | Other | Lake Elsinore · Riverside County | — | — |
| J & E Engineering And Construction | Omar Alexzander Castillo | — | (951) 525 2958 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| J & E Martinez INC | Jose Maria Martinez Flores | — | (951) 536 2606 | Other | Lake Elsinore · Riverside County | — | — |
| J & E Pro Painting | Jimena Gonzalez Delgado | — | (951) 335 6818 | Windows, patio, painters | Perris · Riverside County | — | — |
| J & E Texture INC | Francisco Javier Gonzalez | — | (951) 903 7301 | Windows, patio, painters | Corona · Riverside County | — | — |
| J & E Welding INC | Jorge Omar Jr Diaz | — | (951) 232 5248 | Other | Murrieta · Riverside County | — | — |
| J & G Construction LLC | Benjamine Asghar | — | (951) 206 8038 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| J & G Precision Excavation | Jovani Gabriel Perez Maldonado | — | (951) 283 5305 | Other | Riverside · Riverside County | — | — |
| J & H Flooring INC | Henry John Ibarria | — | (951) 623 3052 | Other | Perris · Riverside County | — | — |
| J & H Mechanical INC | Jose Maria Anaya Cardenas | — | (310) 944 0672 | HVAC | Jurupa Valley · Riverside County | — | — |
| J & J Earthworks & Demolition | Michael John Willemsen | — | (951) 538 8723 | Other | Eastvale · Riverside County | — | — |
| J & J Plumbing Nuevo INC | Juan V Quiroz | — | (951) 928 3650 | Other | Romoland · Riverside County | — | — |
| J & J Services | Ortiz Julio | — | (951) 285 2888 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| J & K Electric INC | Michael Steven Cuffel | — | (951) 677 1154 | Electricians | Murrieta · Riverside County | — | — |
| J & L Electrical Services INC | James Scott Boice | — | (951) 734 1507 | Electricians | Corona · Riverside County | — | — |
| J & M Construction | Loyd Eugene Jr Mc Ghee | info@jmconstruction.com | (805) 472-2400 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| J & M Landscaping | Jose Serafin Fonseca-Soto | — | (619) 920 2056 | Windows, patio, painters | Temecula · Riverside County | — | — |
| J & M Leyva General Engineering | Lyndon Garcia | — | (951) 796 4804 | Windows, patio, painters | Riverside · Riverside County | — | — |
| J & M Precision Construction | Julio Cesar Paiz | — | (951) 894 6457 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| J & M Pro Maintenance INC DBA J & M Construction Cleanup | Jonathan Stephen Tomlinson | — | (909) 499 8219 | Other | Moreno Valley · Riverside County | — | — |
| J & N Crabtree Enterprises INC | Nathan William Crabtree | — | (951) 966 0546 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| J & O Remodeling | Olga Maria Vela Rocha | — | (714) 718 7570 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| J & R Landscape Management LLC | Ruben Morales | — | (909) 528 9413 | Windows, patio, painters | Beaumont · Riverside County | — | — |
| J & R Socal Doors | Rogelio Sanchez Leon | — | (714) 788 4988 | Other | Winchester · Riverside County | — | — |
| J & S General Contractors INC | James Thomas Munro | — | (626) 689 3706 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| J & S Ornamental Metals | Jorge Luis Lopez Alvarado | — | (760) 275 0702 | Other | Desert Hot Springs · Riverside County | — | — |
| J & T Unlimited Construction INC | Raymundo Diaz | — | (951) 824 4760 | Other | Corona · Riverside County | — | — |
| J & V Trenching INC | Victor Campos Diaz | — | (951) 232 4979 | Other | Perris · Riverside County | — | — |
| J + R Lathing + Plastering | Jorge Luis Mercado | — | (760) 497 4755 | Other | Temecula · Riverside County | — | — |
| J - Z Concrete Construction INC | Zeke Coronel | — | (760) 775 5550 | Other | Indio · Riverside County | — | — |
| J A B Construction | Jose Antonio Barrera | — | (760) 899 0466 | GC, remodel, ADU | Indio · Riverside County | — | — |
| J A Dolan General Contractor INC | Joseph Ambrose Dolan | — | (760) 275 3247 | GC, remodel, ADU | Indian Wells · Riverside County | — | — |
| J A Flooring | J A Flooring | — | (951) 415 7649 | Other | Perris · Riverside County | — | — |
| J A M B Construction Management | Michael Robert Antho Burnaz | — | (949) 813 9638 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| J A Power Electric INC | Arturo Martinez-Marino | — | (323) 534 1422 | Electricians | Moreno Valley · Riverside County | — | — |
| J A Russo Enterprises INC | John Anthony Russo | — | (951) 836 0530 | GC, remodel, ADU | Corona · Riverside County | — | — |
| J Aceves Custom Painting | J Aceves Custom Painting | — | (760) 343 6458 | Windows, patio, painters | Indio · Riverside County | — | — |
| J And J Builders | J And J Builders | — | (951) 265 2544 | GC, remodel, ADU | Murrieta · Riverside County | — | — |