| Castro Roofing INC | Linda Castro | — | (760) 343 0042 | Other roofers | Palm Desert · Riverside County | — | — |
| Castro's Concrete | Castro's Concrete | — | (760) 272 4201 | Other | Cathedral City · Riverside County | — | — |
| Cat Tracking INC | Pamela Lee Follmer | — | (951) 682 1494 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Cat-5 Audio Video | Cat-5 Audio Video | — | (760) 310 6528 | Other | Wildomar · Riverside County | — | — |
| Catalano Av And Electrical | Ryan Edward Catalano | — | (760) 522 1040 | Electricians | Winchester · Riverside County | — | — |
| Cates Construction | Jeffrey Lynn Cates | — | (714) 718 7052 | GC, remodel, ADU | Norco · Riverside County | — | — |
| Cathedral City Air Conditioning & Heating INC | Magdy Adeeb Ghaly | — | (760) 321 8352 | HVAC | Palm Springs · Riverside County | — | — |
| Cato Construction And Consulting | Carlos Roberto Torres | — | (951) 544 5249 | GC, remodel, ADU | Cabazon · Riverside County | — | — |
| Caulder Electric | Derek Caulder Roberts | droberts@caulderelectric.com | (909) 477 0064 | Electricians | Norco · Riverside County | — | — |
| Cazares Air Conditioning & Heating | Cazares Air Conditioning & Heating | — | (760) 578 3586 | HVAC | Indio · Riverside County | — | — |
| Cazares Tile And Marble INC | Estanislado Cazares Cardenas | — | (760) 578 1658 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Caztor Construction Company | Cazares Emerardo | — | (760) 485 5090 | GC, remodel, ADU | Mecca · Riverside County | — | — |
| Cb Controls | Donald Paul Lemons | hr@cb-controls.com | (951) 361 2247 | HVAC | Mira Loma · Riverside County | — | — |
| Cb Glazing INC | Everett James Courter | — | (951) 264 3387 | Windows, patio, painters | Norco · Riverside County | — | — |
| Cc Construction | Brett Casey Calhoun | — | (951) 586 4100 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Ccm Steel | Charles Jr Alford | — | (714) 525 8949 | Other | Riverside · Riverside County | — | — |
| Ccs Carrera Construction Services INC | Carlos Camarena Carrera | — | (951) 316 7478 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Cd Trenching LLC | David James Sherman | — | (951) 699 9988 | Other | Temecula · Riverside County | — | — |
| Cde General Engineering Corp | Erick Rodolfo Chavez | — | (951) 580 5517 | Other | Wildomar · Riverside County | — | — |
| Cdi Installations INC DBA Cdi Window Coverings | Marc Roy Stewart | — | (760) 343 4444 | Other | Thousand Palms · Riverside County | — | — |
| Cdl Landscape INC | Christian Lage Dreyer | — | (951) 324 0062 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Cdm Services INC | Daniel Jr Martinez | — | (951) 435 3383 | Other | Nuevo · Riverside County | — | — |
| Ceag Electric Co INC | Cesar Raul Ramirez | — | (951) 846 6774 | Electricians | Jurupa Valley · Riverside County | — | — |
| Ceballos Awnings INC | Ceballos Alberto | — | (714) 321 9411 | Other | Homeland · Riverside County | — | — |
| Ceballos Painting Service INC | Jose Aaron Sandoval | — | (714) 883 9515 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Cedar Landscaping Services | Sal Villalobos Delgado | cedarlandscapingservices@gmail.com | (909) 788 4394 | Windows, patio, painters | Eastvale · Riverside County | — | — |
| Ceiling Concepts | Ceiling Concepts | — | (909) 841 1173 | Other | Temecula · Riverside County | — | — |
| Cell Tech | Esteban John Dupont | — | (714) 768 9045 | Other | Corona · Riverside County | — | — |
| Cement Sisters INC DBA Construction Sisters | Krissy Joan Musetti | — | (949) 220 6040 | GC, remodel, ADU | Homeland · Riverside County | — | — |
| Cenco Construction Group | Gerardo Jr Centeno | — | (951) 391 3126 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| Cenobio Ramirez | Cenobio Ramirez | — | (442) 234 4099 | GC, remodel, ADU | Cathedral City · Riverside County | — | — |
| Centeno Plumbing | Jose Guadalupe Centeno Canelo | — | (951) 795 6398 | Other | Wildomar · Riverside County | — | — |
| Center Electric Services INC | Henry Michael Munksgaard | — | (951) 688 6865 | Electricians | Riverside · Riverside County | — | — |
| Centerline Equipment INC | Brian Scott Pumphrey | — | (951) 746 5240 | Other | Menifee · Riverside County | — | — |
| Centerline General Construction INC | Justin Lyman Fosdick | — | (951) 291 3363 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Centra | Jay Reed Brown | info@centra.com | (951) 294 1064 | Electricians | Temecula · Riverside County | — | — |
| Central Aire Heating & Air Conditioning Service INC | Steven Richard Skajem | — | (951) 352 2802 | HVAC | Riverside · Riverside County | — | — |
| Central City Enterprises | John Joseph Burda | — | (951) 343 2000 | Other | Riverside · Riverside County | — | — |
| Central Service Heating & Air INC | David John Hilke | — | (951) 922 6555 | HVAC | Banning · Riverside County | — | — |
| Centric Electric | Dennis Keith Johnson | eben@eyebytes.com | (310) 925 2932 | Electricians | Riverside · Riverside County | — | — |