| Current Home INC DBA Current Home Solar | Jarrod Jeffrey Fisk | — | (855) 429 9208 | Other roofers | Hemet · Riverside County | — | — |
| Current Power Electric INC | Robert Paul Alvarez | — | (951) 440 2441 | Electricians | Winchester · Riverside County | — | — |
| Curt's Floor Covering | Curt's Floor Covering | — | (951) 789 1095 | Other | Perris · Riverside County | — | — |
| Curtis Adams | Curtis Adams | — | (310) 701 1020 | Other | Riverside · Riverside County | — | — |
| Curtis Daniel Mc Calla | Curtis Daniel Mc Calla | — | (760) 398 3977 | Other | Coachella · Riverside County | — | — |
| Curtis Dump Truck & Backhoe Service INC | Jack Howard Curtis | — | (951) 674 6156 | Other | Wildomar · Riverside County | — | — |
| Curtis Landscape And Design | Curtis Landscape And Design | — | (951) 227 8363 | Windows, patio, painters | Corona · Riverside County | — | — |
| Curtner Painting And Wallpapering | Curtner Painting And Wallpapering | — | (760) 408 1814 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Cusico Construction INC | Ryan Michael Cusic | micah@micahrich.com | (951) 348 5770 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Cusimano Electric INC | Frank Victor Cusimano | — | (330) 506 4550 | Electricians | Corona · Riverside County | — | — |
| Custom Age Electric INC | Jose Jauregui | — | (951) 334 8921 | Electricians | Riverside · Riverside County | — | — |
| Custom Built Entertainment Centers | Custom Built Entertainment Centers | — | (951) 816 2449 | Other | Wildomar · Riverside County | — | — |
| Custom Carpentry | Donna Lee Mckeehan | — | (951) 928 1250 | GC, remodel, ADU | Nuevo · Riverside County | — | — |
| Custom Carpentry Solutions Ccs | Gustavo Reyes-Lopez | — | (619) 616 0811 | Other | Murrieta · Riverside County | — | — |
| Custom Co Painting | Tellez Edwin | info@custompainting.com | (760) 705 5492 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Custom Coating Restorations INC | Grajeda Raul | — | (800) 621 6722 | Windows, patio, painters | Riverside · Riverside County | — | — |
| Custom Concepts Tree Care | Diaz Escamilla Pedro | — | (760) 409 2965 | Tree | Cathedral City · Riverside County | — | — |
| Custom Concrete Incorporated | Nicole Frances Murdica Gonzalez | — | (760) 585 9898 | Other | Rancho Mirage · Riverside County | — | — |
| Custom Concrete Services Corp | Craig Everret Goveia | — | (909) 262 4455 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| Custom Concrete Works | Custom Concrete Works | — | (951) 365 9206 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Custom Const Builders INC | Thomas Edward Johnson | — | (951) 218 1586 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Custom Controls | Custom Controls | — | (760) 345 7885 | Electricians | Palm Springs · Riverside County | — | — |
| Custom Courts INC | Ruiz David Pichardo | — | (951) 447 9124 | Other | Perris · Riverside County | — | — |
| Custom Craft Construction INC | Robert Joseph Candelaria | — | (951) 525 3522 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Custom Creations Flooring & Tile DBA Waymaker Construction Compan | Joshua Ryan Flanders | — | (760) 792 4849 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Custom Design Painting | Custom Design Painting | customdesignpainting75@gmail.com | (760) 660 3958 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Custom Designs In Wood INC | John Thomas Cummins | — | (760) 772 9135 | Other | Palm Desert · Riverside County | — | — |
| Custom Dreams Construction | David Lesean Embers | — | (951) 563 3003 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Custom Finish Construction | Nicolas David Wilging | — | (330) 257 4243 | GC, remodel, ADU | Banning · Riverside County | — | — |
| Custom Flooring Installations | Custom Flooring Installations | — | (714) 658 8286 | Other | Corona · Riverside County | — | — |
| Custom Flow Mechanical | Custom Flow Mechanical | — | (909) 917 3688 | Other | Murrieta · Riverside County | — | — |
| Custom Home Technologies | Kristopher Lawrence Wedekind | — | (760) 778 8686 | Other | Cathedral City · Riverside County | — | — |
| Custom Installation Service Company | Francisco Javier Felix | — | (951) 202 6762 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Custom Interior Woodworks | Custom Interior Woodworks | — | (714) 306 7909 | Other | Wildomar · Riverside County | — | — |
| Custom Landscape Enterprise INC | Gregory Wade Anderson | — | (951) 288 0028 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Custom Landscape Services | Sharon Lee Howard | — | (760) 568 0293 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Custom Masonry Designs | Custom Masonry Designs | eben@eyebytes.com | (951) 757 1879 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Custom Mobile Welding | Custom Mobile Welding | — | (909) 268 4268 | Other | Jurupa Valley · Riverside County | — | — |
| Custom Painting Services | Shawn Gilbert Romo | — | (909) 831 6230 | Windows, patio, painters | Mira Loma · Riverside County | — | — |
| Custom Quality Finish Carpentry INC | Shawn Michael Hughes | — | (951) 278 0066 | Other | Corona · Riverside County | — | — |