| Carrillos Tile INC | Yuri Manuel Gamez Carrillo | — | (760) 275 0701 | Other | Indio · Riverside County | — | — |
| Cartwright Construction | Glenn Fabian Cartwright | — | (310) 242 3266 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Carver Air Condition & Heating | Carver Air Condition & Heating | — | (760) 799 4205 | HVAC | Desert Hot Springs · Riverside County | — | — |
| Cary Schroeder Contracting INC | Schroeder Cary | — | (951) 677 6678 | Other | Murrieta · Riverside County | — | — |
| Casa Blanca Kitchen Cabinets INC | Mehdi Madanipour | — | (951) 808 3076 | Other | Corona · Riverside County | — | — |
| Casa Bonita Landscape Services | Martinez-mosqueda Antonio | — | (760) 413 9228 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| Casa Grande Construction | Oscar Humberto Ramirez | — | (951) 836 6493 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Casa Mf | Casa Mf | — | (951) 212 3116 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Casa Noir Construction | Darren Christopher Misaresh | — | (310) 227 7547 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Casa Renovations INC | Jorge Ulises Vasquez | — | (951) 427 5066 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Casa Valenzuela Construction INC | Javier Cabrera Valenzuela | — | (951) 373 4385 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Casaga Electric INC | Anthony Michael Casaga | — | (951) 600 2822 | Electricians | Murrieta · Riverside County | — | — |
| Casales Construction | Ruby I Casales Jaime | — | (951) 732 4409 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Casanova S R N F | Casanova S R N F | — | (909) 419 0180 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| Casas Roofing INC | Joseph Adrian Casas | — | (323) 974 8389 | Other roofers | Norco · Riverside County | — | — |
| Cascio Landscape Construction | Anthony Cascio-Mariana | — | (760) 567 4070 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Casco Equipment Corporation | Richard Dwight Sherick | — | (951) 324 8500 | Other | Riverside · Riverside County | — | — |
| Casey's Chimney Relief | Casey's Chimney Relief | — | (951) 675 6099 | GC, remodel, ADU | Mira Loma · Riverside County | — | — |
| Cash Equipment INC | Randy Lee Gibson | — | (951) 840 7125 | Other | Riverside · Riverside County | — | — |
| Casillas Floor Covering | Casillas Floor Covering | — | (760) 972 8636 | Other | Hemet · Riverside County | — | — |
| Casita Electric | Rachel Berta Castro | — | (951) 733 3133 | Electricians | Corona · Riverside County | — | — |
| Casita Heating & Air | Casita Heating & Air | — | (951) 432 8823 | HVAC | Corona · Riverside County | — | — |
| Casitas Framing | Casitas Framing | — | (714) 710 2107 | Other | Riverside · Riverside County | — | — |
| Cass Plumbing INC | Casimiro Leon Garcia | — | (951) 254 1123 | Other | Corona · Riverside County | — | — |
| Cast In Place Construction INC | Jose Santos Requena | — | (951) 353 8247 | Other | Riverside · Riverside County | — | — |
| Cast Plumbing INC | Castaneda Carlos | — | (760) 404 8810 | Other | Indio · Riverside County | — | — |
| Castaneda Construction | Rodriguez Castaneda Humberto | — | (949) 510 9302 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Castanon's Construction | Aurelio Jr Castanon | — | (909) 644 6869 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Castellanos Tree Service Company | Rivera Yolly Vega | — | (760) 275 4327 | Other | Thousand Palms · Riverside County | — | — |
| Castillo General Contractors | Braulio Hernan Castillo | — | (760) 898 6799 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Castillo HVAC | Arturo Castillo | — | (951) 301 4452 | HVAC | Menifee · Riverside County | — | — |
| Castillo Masonry INC | Oscar Gerardo Castillo Rodriguez | — | (760) 641 5760 | Other | Desert Hot Springs · Riverside County | — | — |
| Castillo Painting INC | Jose Pablo Castillo Perez | — | (951) 479 2556 | Windows, patio, painters | Corona · Riverside County | — | — |
| Castillo's Carpet Shack | Elvira Marie Castillo | — | (951) 684 0212 | Other | Riverside · Riverside County | — | — |
| Castillon Bros Glazing | Quintero Modesto Castillon | — | (951) 897 0281 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Castillos Jd Concrete INC | Guadalupe Javier Valdes Gamboa | — | (760) 272 5551 | Other | Desert Hot Springs · Riverside County | — | — |
| Castle Construction | Jorge Alberto Castillo | — | (951) 380 9402 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Castle Rock Construction Group | Erik Ivan Ochoa | — | (760) 250 6457 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Castle Stucco INC | Granillo David | — | (760) 668 6229 | Other | Thousand Palms · Riverside County | — | — |
| Castro Custom Paintings | Castro Custom Paintings | — | (760) 275 2392 | Windows, patio, painters | Cathedral City · Riverside County | — | — |