| J And J Industrial Electric INC | Javier Jr Elias | — | (909) 322 2157 | Electricians | Norco · Riverside County | — | — |
| J And K Construction | Kevin Lee Richards | jk@jkconstruction.com | (909) 222 3896 | GC, remodel, ADU | Calimesa · Riverside County | — | — |
| J And M Landscape | J And M Landscape | — | (951) 293 1424 | Windows, patio, painters | Perris · Riverside County | — | — |
| J And R Pneumatic Tube System | Janette A Dono-Rojas | — | (951) 202 8104 | Other | Riverside · Riverside County | — | — |
| J B C Design & Build Co | Ricardo Belmontes Galisteo | joe@jbcdesignbuild.com | (951) 515 4926 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| J B Contracting | Jacob Eugene Burns | — | (951) 746 4581 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| J B Electric | James Alan Bratton | — | (951) 755 7143 | Electricians | Beaumont · Riverside County | — | — |
| J B Finish INC | Joni Lynn Arnold | jacob@jbfinish.com | (760) 342 6300 | Windows, patio, painters | Indio · Riverside County | — | — |
| J B G Construction & Roofing | John Banales Gonzales | — | (951) 684 8605 | Other roofers | Riverside · Riverside County | — | — |
| J B L Construction | James Woo Lee | — | (760) 969 3795 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| J B Landscape | J B Landscape | — | (951) 454 5096 | Windows, patio, painters | Corona · Riverside County | — | — |
| J B Lugo Builders | J B Lugo Builders | — | (760) 333 9500 | GC, remodel, ADU | Bermuda Dunes · Riverside County | — | — |
| J B M Construction & Development INC | James Brett Marshall | — | (951) 545 0978 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| J B Painting | J B Painting | — | (951) 353 8039 | Windows, patio, painters | Riverside · Riverside County | — | — |
| J B Pools | J B Pools | — | (760) 347 4210 | Pool | Indio · Riverside County | — | — |
| J B Services | Jonathan Everret Branston | — | (951) 505 4042 | Other | Riverside · Riverside County | — | — |
| J B Woodward Floors INC | Sharon Lee Wollman | — | (951) 683 5149 | Other | Riverside · Riverside County | — | — |
| J Bailon Construction | Bailon Juan | — | (760) 972 8234 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| J Baker Builders INC | Jimmy Gene Baker | — | (951) 526 6439 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| J Built Construction | Jesus Aguirre | — | (760) 427 0946 | GC, remodel, ADU | Coachella · Riverside County | — | — |
| J C Building Systems INC | Luis Eduardo Rios | admin@jcbuildingsystems.com | (760) 275 6769 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| J C Construction & Associates | Shaun David Clifton | — | (949) 449 7840 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| J C Creations Enterprises INC | Jose Francisco Lopez Flores | — | (760) 708 6862 | Windows, patio, painters | Indio · Riverside County | — | — |
| J C Custom Construction | Jeff Clay Nelson | cconstruction.jc@gmail.com | (619) 368 9207 | GC, remodel, ADU | Blythe · Riverside County | — | — |
| J C Custom Painting | J C Custom Painting | — | (909) 786 9368 | Windows, patio, painters | San Jacinto · Riverside County | — | — |
| J C Decierdo Corporation | Julian Cablayan Decierdo | — | (760) 219 2629 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| J C Electrical Contractors INC | James Joseph Cogley | — | (909) 721 0972 | Electricians | Norco · Riverside County | — | — |
| J C F Construction Co INC | Juan Carlos Jr Frias | — | (951) 966 1384 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| J C Fire Protection | J C Fire Protection | — | (760) 625 5908 | Other | North Palm Springs · Riverside County | — | — |
| J C Framing Construction INC | Roger Anthony Jaeger | — | (951) 506 1464 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| J C G Landscaping | J C G Landscaping | — | (714) 267 2161 | Windows, patio, painters | Riverside · Riverside County | — | — |
| J C Glass And Shower Door | Jeremiah Francis Cole | — | (760) 219 7517 | Windows, patio, painters | Cherry Valley · Riverside County | — | — |
| J C Grading & Excavating | Jose Antonio Comparan | — | (951) 545 7794 | Other | Lake Elsinore · Riverside County | — | — |
| J C H V A C And Maintenance | Jesus Moquel Castillo | — | (714) 728 9805 | HVAC | Jurupa Valley · Riverside County | — | — |
| J C Howe Construction | Jeffrey William Howe | — | (949) 422 1064 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| J C Kelley Construction INC | Jasmin Christina Kelley | jckelleyconstructioninc@gmail.com | (714) 392-1640 | GC, remodel, ADU | Norco · Riverside County | — | — |
| J C Painting | J C Painting | — | (951) 271 1974 | Windows, patio, painters | Norco · Riverside County | — | — |
| J C Plumbing LLC | Jack Truett Havlicheck | — | (951) 595 4828 | Other | Murrieta · Riverside County | — | — |
| J C Power | J C Power | — | (616) 497 2460 | Electricians | Jurupa Valley · Riverside County | — | — |
| J C Pro Painting | J C Pro Painting | — | (760) 715 8180 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |