| Canyon View Electric LLC | Derrick Thomas Feaster | — | (951) 264 9625 | Electricians | Corona · Riverside County | — | — |
| Capex Roofing LLC | Chad Allen Bailey | — | (951) 833 0017 | Other roofers | Murrieta · Riverside County | — | — |
| Capistrano Computers | Capistrano Computers | — | (714) 317 2838 | Other | Murrieta · Riverside County | — | — |
| Capital Building Services INC | Guillermo Sanchez | — | (760) 776 3800 | GC, remodel, ADU | Rancho Mirage · Riverside County | — | — |
| Capital Construction INC | Nathan Tyler Jones | design@capitalconstruction.com | (916) 277-8282 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Capital General Contracting | William Edward Casey | — | (951) 240 2248 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Capital Paving | Robert Steve Todorovitch | — | (408) 757 1577 | Other | Perris · Riverside County | — | — |
| Capital Plumbing Co | Carlos Francisco Mejia | — | (951) 490 9116 | Other | Perris · Riverside County | — | — |
| Capital Roofing Partners Inc. | Miranda Jean Smith | — | (951) 344 1180 | Other roofers | Corona · Riverside County | — | — |
| Capital Service Force | Eric James Torres | hello@rfuenzalida.com | (562) 298 2019 | HVAC | Eastvale · Riverside County | — | — |
| Capital Signs | Daniel Esteban Garcia Perez | — | (760) 902 8418 | Other | Desert Hot Springs · Riverside County | — | — |
| Capitol One Plumbing | Capitol One Plumbing | — | (909) 325 0421 | Other | Beaumont · Riverside County | — | — |
| Capparelli Contracting Co INC | Edward Charles Capparelli | — | (714) 283 4400 | Other | Corona · Riverside County | — | — |
| Cappello Brothers Plumbing INC DBA Rossman Plumbing | Jordan Albert Cappello | — | (951) 278 2690 | Other | Riverside · Riverside County | — | — |
| Capper Construction | Jon Allen Capper | — | (818) 645 3021 | GC, remodel, ADU | La Quinta · Riverside County | — | — |
| Capra Electric INC | Jonathan Emanuel Medina | — | (951) 528 7947 | Electricians | Temecula · Riverside County | — | — |
| Capra Landscape Construction | Marc Mendoza | — | (760) 207 6152 | Windows, patio, painters | Anza · Riverside County | — | — |
| Capricorn Drywall & Construction | Edward Ross Lopez | — | (760) 288 9939 | GC, remodel, ADU | Thousand Palms · Riverside County | — | — |
| Capstone Tile And Stone | Capstone Tile And Stone | — | (949) 294 2703 | Other | Lake Elsinore · Riverside County | — | — |
| Captaincool Heating And Air | Salvador Jr Saavedra | — | (442) 222 5636 | HVAC | Indio · Riverside County | — | — |
| Captive Cool Breeze And Heating | Captive Cool Breeze And Heating | — | (760) 402 2355 | HVAC | Menifee · Riverside County | — | — |
| Capx Construction | Allen Kenneth Eppens | — | (714) 423 8188 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Caracas Plumbing INC | Cornelio Antonio Romero Perez | — | (760) 238 6603 | Other | Indio · Riverside County | — | — |
| Cardenas Construction | Fernando Rafael Cardenas | — | (909) 358 0664 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Cardenas Construction Company INC | Cardenas Alejandro | — | (760) 393 6617 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Cardenas Construction Corporation | Jose Manuel Cardenas | — | (714) 323 2273 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Cardenas Heating & Cooling | Cardenas Heating & Cooling | — | (909) 215 1754 | HVAC | Riverside · Riverside County | — | — |
| Cardenas Painting Corp | Javier Cardenas | cardenas001@yahoo.com | (402) 850-0373 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| Cardenas Plumbing | Cardenas Plumbing | — | (951) 563 1101 | Other | Moreno Valley · Riverside County | — | — |
| Cardinal Landscape | Jesus Anaya | — | (951) 295 4192 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Cardinal Sheet Metal INC | Bruce Leo Seyler | — | (951) 788 8800 | HVAC | Riverside · Riverside County | — | — |
| Cardonal Construction | Hector Hugo Islas Hernandez | — | (714) 244 6142 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Care Pools & Spas Maintenance | Care Pools & Spas Maintenance | — | (760) 784 5714 | Pool | Coachella · Riverside County | — | — |
| Cargill Telecom | Cargill Telecom | — | (951) 302 1854 | Other | Temecula · Riverside County | — | — |
| Carl A Thornton Construction | Carl Allen Thornton | — | (951) 202 6846 | GC, remodel, ADU | Beaumont · Riverside County | — | — |
| Carl Arentz | Carl Arentz | — | (951) 468 4373 | Other | Idyllwild · Riverside County | — | — |
| Carl E Brady | Carl E Brady | — | (760) 625 5545 | Other | Palm Desert · Riverside County | — | — |
| Carl E Whitt DBA Carl's Fine Finish | Carl's Fine Finish | — | (951) 279 2677 | Other | Corona · Riverside County | — | — |
| Carl J Fuess | Carl J Fuess | — | (951) 805 4098 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| Carl J Johnson | Carl J Johnson | — | (951) 245 5400 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |