| Campanella's 3 Oaks Building Contractor | Campanella's 3 Oaks Building Contractor | — | (951) 434 4784 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Campbell Electric INC | Rachelle Lynn Gnagnarelli | — | (800) 552 1100 | Electricians | Murrieta · Riverside County | — | — |
| Campbell's Custom Electric | Stephen Allen Campbell | — | (951) 712 7981 | Electricians | Riverside · Riverside County | — | — |
| Campbell's Lighting Signs Electrical Services INC | David Lee Campbell | — | (951) 244 7750 | Electricians | Lake Elsinore · Riverside County | — | — |
| Campos Construction | Campos Herubey | — | (951) 313 0839 | GC, remodel, ADU | Romoland · Riverside County | — | — |
| Campos Construction | Juan Francisco Campos | — | (951) 784 5028 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Campos Electric INC | Omar Campos | — | (714) 313 2251 | Electricians | Menifee · Riverside County | — | — |
| Campusano Construction INC | Sebastian Juan Campusano | — | (323) 806 4957 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Can - Do Backhoe & Dump Ii | Curtis Allen Norman | — | (951) 847 4909 | Other | Norco · Riverside County | — | — |
| Can Am Interiors INC | Gregory Warne Davies Mann | — | (949) 697 4309 | Other | Murrieta · Riverside County | — | — |
| Canam Developments INC | Bruce Fraser Clark | — | (760) 408 3827 | GC, remodel, ADU | Palm Springs · Riverside County | — | — |
| Candee Construction | Keith Cody Candee | — | (951) 233 1091 | Other | Temecula · Riverside County | — | — |
| Candee Electric | Timothy Edward Candee | info@candee-electric.com | (408) 910 8808 | Electricians | Winchester · Riverside County | — | — |
| Candes Cabinets INC | Jose Valenzuela | — | (951) 509 2505 | Other | Riverside · Riverside County | — | — |
| Candido Ivan Torres | Candido Ivan Torres | — | (909) 856 3480 | Other | Moreno Valley · Riverside County | — | — |
| Candor Networks | Anthony Dominic Meaders | — | (951) 339 0190 | Other | Corona · Riverside County | — | — |
| Candor Pump | Elisha Micheal Jimenez | — | (951) 675 3405 | Other | Hemet · Riverside County | — | — |
| Canduit Electric | Michael Anthony Jack | — | (951) 682 2169 | Electricians | Riverside · Riverside County | — | — |
| Canny Painting | Canny Painting | — | (310) 869 0610 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Cano's Door Cabinet INC | Jose Cano-Hernandez | — | (951) 732 2553 | Other | Riverside · Riverside County | — | — |
| Canon Coating Co | Jeffrey Lance Marguet | — | (951) 735 4119 | Other | Norco · Riverside County | — | — |
| Cantilever Incorporated | Hitesh Chhotu Patel | — | (951) 545 2956 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Cantoni Plumbing INC | Carmen Julia Cantoni | — | (951) 279 1041 | Other | Corona · Riverside County | — | — |
| Cantos Heating And Air Conditioning | Cantos Heating And Air Conditioning | — | (909) 856 5447 | HVAC | Calimesa · Riverside County | — | — |
| Canyon Construction Services | Rafael Garcia Cisneros | info@canyonconstructionservices.com | (800) 294 8485 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Canyon Electric INC | Von Benton Trunk | service@canyonelectric.com | (760) 327 6416 | Electricians | Cathedral City · Riverside County | — | — |
| Canyon Electrical Works | David Travis Sidebottom | — | (951) 347 0200 | Electricians | Riverside · Riverside County | — | — |
| Canyon Fire Alarm Systems | Canyon Fire Alarm Systems | — | (951) 468 8005 | Electricians | Canyon Lake · Riverside County | — | — |
| Canyon Floor Corporation | Vickie Lynn Amburgey | — | (760) 770 2020 | Other | Cathedral City · Riverside County | — | — |
| Canyon Glass | Canyon Glass | — | (951) 314 3747 | Windows, patio, painters | Mira Loma · Riverside County | — | — |
| Canyon Hills Plumbing INC | Jason Troy Carroll | — | (951) 970 7550 | Other | Lake Elsinore · Riverside County | — | — |
| Canyon Hydroseeding | Canyon Hydroseeding | — | (951) 680 1949 | Other | Beaumont · Riverside County | — | — |
| Canyon Lake Garage Doors INC | Eric Perry Davis | — | (760) 525 4668 | Other | Canyon Lake · Riverside County | — | — |
| Canyon Lake Kitchen & Bath | Canyon Lake Kitchen & Bath | — | (951) 760 0462 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Canyon Lake Plastering And Painting | Canyon Lake Plastering And Painting | — | (951) 235 4021 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Canyon Lake Underground | Canyon Lake Underground | — | (951) 502 6919 | Other | Canyon Lake · Riverside County | — | — |
| Canyon Pool Service | Danny Bryan Benson | — | (951) 768 2972 | Pool | Menifee · Riverside County | — | — |
| Canyon Specialties | Richard Clay Clark | — | (760) 345 8200 | Pool | Palm Desert · Riverside County | — | — |
| Canyon Springs Enterprises | Thomas Patrick Uppena | — | (951) 925 2288 | Other | Temecula · Riverside County | — | — |
| Canyon Steel Fabricators INC | Thomas Joseph Baggett | — | (951) 683 2352 | Other | Perris · Riverside County | — | — |