| Jim Osuna Painting | Jim Osuna Painting | — | (951) 834 2100 | Windows, patio, painters | Temecula · Riverside County | — | — |
| Jim Sowers Construction | James Stephen Sowers | — | (951) 776 7480 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jim Spencer Floor Covering | Jim Spencer Floor Covering | — | (760) 568 3633 | Other | Palm Desert · Riverside County | — | — |
| Jim Whinery DBA M W Floor Covering | M W Floor Covering | — | (909) 772 9797 | Other | Wildomar · Riverside County | — | — |
| Jimenez Bros Painting | Jesus Alfredo Jimenez | — | (760) 404 7640 | Windows, patio, painters | Thermal · Riverside County | — | — |
| Jimenez Landscape & Maintenance INC | Jose Nieves Jimenez | — | (714) 709 6467 | Windows, patio, painters | Norco · Riverside County | — | — |
| Jimenez Landscaping INC | Cadena Benito Jimenez | contact@sansoxygen.com | (760) 619 1459 | Windows, patio, painters | La Quinta · Riverside County | — | — |
| Jimenez Roofing And Water Proofing INC | Diego Jimenez-Monroy | — | (714) 872 1345 | Other roofers | Riverside · Riverside County | — | — |
| Jimmy Eugene Morlet | Jimmy Eugene Morlet | — | (760) 578 9806 | GC, remodel, ADU | White Water · Riverside County | — | — |
| Jimmy Sanchez | Jimmy Sanchez | — | (760) 541 2853 | Other | Coachella · Riverside County | — | — |
| Jimmy Smith Masonry | Jimmy Smith Masonry | — | (951) 361 1405 | Other | Riverside · Riverside County | — | — |
| Jimmy's Glass | Jimmy Eduardo Flores | — | (951) 552 3505 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Jinsoo Lee | Jinsoo Lee | — | (951) 235 7830 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Jireh AC And Heating Services | Esquivel Salazar David | — | (714) 631 3201 | HVAC | Corona · Riverside County | — | — |
| Jireh Painting | Mercado Cesar Suazo | — | (909) 636 1523 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Jireh's Plumbing | Jireh's Plumbing | — | (909) 728 6527 | Other | Beaumont · Riverside County | — | — |
| Jitney Company INC | Carolyn Hawkins Cunningham | — | (951) 898 1122 | Electricians | Corona · Riverside County | — | — |
| Jj Air INC | Francisco Javier Jimenez | — | (951) 533 6124 | HVAC | Riverside · Riverside County | — | — |
| Jj Builders Ca | Joshua John Phillips | — | (626) 808 1642 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jj Energy INC | Jordan Levi Jaso | — | (760) 851 3632 | Electricians | Palm Desert · Riverside County | — | — |
| Jj Flawless Pools Service And Repair | Janey Renee Chakalis | — | (760) 702 1907 | Pool | La Quinta · Riverside County | — | — |
| Jj Heating And Air INC | Jimenez Jesus | — | (951) 662 3846 | HVAC | Riverside · Riverside County | — | — |
| Jj Rutilios Landscaping LLC | Javier Rocha | — | (714) 225 4404 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Jj&m Builders INC | Jose De Jesus Moctezuma Trujillo | — | (951) 530 6926 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jjb Pools INC | Jose Carlos Vargas | — | (760) 322 1515 | Pool | Palm Desert · Riverside County | — | — |
| Jjc Project Management Group INC | Cecilia Rosalie Cuevas | — | (951) 789 4800 | Electricians | Riverside · Riverside County | — | — |
| Jjde Construction INC | Jose Sr Garcia | — | (760) 619 4458 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Jjj Construction | Jessi James Jankowski | — | (951) 293 6317 | GC, remodel, ADU | Cherry Valley · Riverside County | — | — |
| Jjm Flooring INC | Juan Jr Jimenez | — | (951) 255 8624 | Other | Riverside · Riverside County | — | — |
| Jki Structural Steel INC | Ricardo Garcia | — | (562) 607 5602 | Other | Calimesa · Riverside County | — | — |
| Jks Electrical | James Robert Sciolla | — | (951) 317 3837 | Electricians | Hemet · Riverside County | — | — |
| Jl Construction | Jenner Avisali Lopez | — | (760) 250 4728 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Jl Construction Contractor LLC | Jonathan Itzael Luna Velasco | — | (951) 390 5945 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Jl Development LLC | Jett Jeffrey Larson | — | (760) 834 1914 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Jl Painting | Jl Painting | — | (442) 324 9864 | Windows, patio, painters | Perris · Riverside County | — | — |
| Jla Painting Services | Jose Luis Alconedo | — | (951) 531 4925 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Jla Real Estate Group Inc. | Jla Real Estate Group Inc. | — | (951) 784-0999 | Property managers | Riverside · Riverside County | — | — |
| Jlc Custom Home Improvement And Remodeling INC | Christina Marie Casillas | — | (760) 464 5676 | GC, remodel, ADU | Cherry Valley · Riverside County | — | — |
| Jlc Energy Solutions INC | Christopher William Lippiatt | — | (661) 468 3424 | Electricians | Corona · Riverside County | — | — |
| Jlg Remodeling Enterprise | Jlg Remodeling Enterprise | — | (909) 568 9682 | GC, remodel, ADU | Riverside · Riverside County | — | — |