| Jlg Tree Service | Jose Luis Jr Guerrero | — | (714) 770 1850 | Tree | Corona · Riverside County | — | — |
| Jlhs Lawn Care & Design LLC | Marcela Hernandez De Dios | — | (760) 835 9060 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Jlkl Enterprises LLC DBA So-cal Electric | James Louis Lafleur | — | (760) 992 4047 | Electricians | Palm Desert · Riverside County | — | — |
| Jlm Grading & Paving | Geovanni Andres Mendoza | — | (909) 990 5253 | Other | Perris · Riverside County | — | — |
| Jlr Development | Jlr Development | — | (951) 227 3800 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Jlr Electric & Power | Danny Valenzuela | — | (714) 342 8244 | Electricians | Winchester · Riverside County | — | — |
| Jlr Electrical | Jose Luis Jr Razo | — | (760) 537 9943 | Electricians | Indio · Riverside County | — | — |
| Jlr Electrical INC | Jose Luis Jr Razo | — | (760) 272 5800 | Electricians | Indio · Riverside County | — | — |
| Jlr Group INC | John Lenn Jr Richards | — | (951) 538 7567 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Jls General Construction INC | Jose Humberto Sanchez | — | (951) 299 8302 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jm Buck Landscaping | Jm Buck Landscaping | — | (760) 774 9169 | Windows, patio, painters | Palm Springs · Riverside County | — | — |
| Jm Concrete Restoration | Jm Concrete Restoration | — | (714) 210 9197 | Restoration | Mira Loma · Riverside County | — | — |
| Jm Construction | John Wightman Iv Mcmurray | info@jmconstruction.com | (805) 472-2400 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Jm Desert Stone & Tile | Avila Jaime Munoz | — | (760) 408 9270 | Other | Indio · Riverside County | — | — |
| Jm General Builders INC | Arturo Cesar Leal Mata | — | (951) 730 8392 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Jm General Contractor INC | Cardoza Omar Hernandez | info@jmgeneralcontractor.com | (818) 322 8163 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Jm Plumbing Services | Joseph Michael Muaau | — | (760) 877 1753 | Other | Lake Elsinore · Riverside County | — | — |
| Jma General Construction | Edgardo Samuel Nieto | — | (323) 506 7565 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Jmag General Construction Corp | Joseph Anthony Magana | — | (323) 765 4083 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| Jmar Builders INC | Martinez Corona Jorge | — | (951) 538 2917 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Jmar Environmental INC | Jesus Martinez | — | (951) 485 7470 | Other | Moreno Valley · Riverside County | — | — |
| Jmb Stainless Steel INC | Jose Mariano Jr Benitez | — | (626) 407 6294 | Other | Hemet · Riverside County | — | — |
| Jmc Building | Jmc Building | — | (323) 818 2504 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Jmc Construction | Joseph Monroe Creel | — | (951) 545 7974 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jmg Construction | Jeesson Miguel Gomez | jgoetz@jmg-construction.com | (951) 220 2499 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Jmg Steel Corp | Jose Angel Garcia Meza | — | (951) 221 2399 | Other | Moreno Valley · Riverside County | — | — |
| Jmj Construction Group DBA Jmj Remodeling Experts | Jezreel Munoz | — | (909) 999 5001 | GC, remodel, ADU | Eastvale · Riverside County | — | — |
| Jmk Builders INC | Kelly Joseph Henry | — | (213) 999 5957 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Jmk Landscape | Jmk Landscape | — | (951) 208 5937 | Windows, patio, painters | Beaumont · Riverside County | — | — |
| Jml Steel Contractors INC | Jose G Aguayo | — | (323) 513 8198 | Other | Menifee · Riverside County | — | — |
| Jmo Drywall Corp | Renteria Erendira Morales | — | (951) 525 0881 | Other | Riverside · Riverside County | — | — |
| Jmr Blinds INC | Juan Manuel Reyes | — | (888) 777 7260 | Other | Norco · Riverside County | — | — |
| Jmt Electrical Services | John Michael Thomas | — | (951) 249 5061 | Electricians | Temecula · Riverside County | — | — |
| Jmuneek Creation Pools | Jmuneek Creation Pools | — | (951) 310 0393 | Pool | Temecula · Riverside County | — | — |
| Jn Landscape Construction LLC | James Bradford Nickolopoulos | jnlandscapeconstruction@gmail.com | (760) 285 3491 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Jn Windows | Jn Windows | — | (909) 513 6221 | Windows, patio, painters | Corona · Riverside County | — | — |
| Jne Builder | Jne Builder | — | (951) 420 4464 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| 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 | — | — |