| C & K General Contracting INC | Brian John Casacchia | — | (951) 272 1520 | GC, remodel, ADU | Corona · Riverside County | — | — |
| C & M Mechanical | Manuel Jr Garcia | — | (626) 427 6155 | HVAC | Jurupa Valley · Riverside County | — | — |
| C & M Pools INC | Corey Eugene Anguiano | — | (760) 360 6254 | Pool | Bermuda Dunes · Riverside County | — | — |
| C & R Property Services | Jose Jesus Rangel | — | (909) 731 1358 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| C & V Floors INC | Chris Eugene Matteson | — | (951) 674 8911 | Other | Lake Elsinore · Riverside County | — | — |
| C - Huffman's Quality Painting | C - Huffman's Quality Painting | — | (909) 208 1186 | Windows, patio, painters | Moreno Valley · Riverside County | — | — |
| C - Max Electric | Nathaniel Derrick Patch | — | (909) 437 5426 | Electricians | Menifee · Riverside County | — | — |
| C A Construction | Alcantara Ruiz Carlos | — | (909) 278 4247 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| C A Construction | Charles Anthony Avila | — | (951) 781 8055 | Other roofers | Riverside · Riverside County | — | — |
| C A Plumbing | C A Plumbing | — | (951) 319 8115 | Other | Murrieta · Riverside County | — | — |
| C A Rooter And Plumbing | C A Rooter And Plumbing | — | (951) 453 2526 | Other | Perris · Riverside County | — | — |
| C A T Electric INC | Craig Anthony Tessitore | — | (951) 735 7505 | Electricians | Corona · Riverside County | — | — |
| C A T T Plumbing INC | William Thomas Trudel | — | (951) 533 1956 | Other | Riverside · Riverside County | — | — |
| C Al Electric | Almaguer Ignacio | — | (714) 280 7442 | Electricians | Riverside · Riverside County | — | — |
| C And J Gunite & Shotcrete INC | Charles Edwin Jr Brown | — | (951) 332 6247 | Pool | Mira Loma · Riverside County | — | — |
| C And S Woodworks INC DBA C And S Home Service | Gregory Alan Smith | — | (760) 567 4713 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| C B C Services INC | Christopher Bradley Crum | — | (760) 250 5691 | Other | Desert Hot Springs · Riverside County | — | — |
| C B Construction | Cody Leigh Backstrom | — | (951) 312 5444 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| C B Plumbing | Curtis Jay Crecelius | — | (760) 922 6550 | Other | Blythe · Riverside County | — | — |
| C B Structural Steel Welding | C B Structural Steel Welding | — | (951) 546 4090 | Other | Corona · Riverside County | — | — |
| C C & D Electric INC | John Andrew Gealta | — | (951) 926 6371 | Electricians | Winchester · Riverside County | — | — |
| C C & M Incorporated | Matthew Olinger Cannan | — | (909) 553 0275 | GC, remodel, ADU | Wildomar · Riverside County | — | — |
| C C & R Nursery INC | Bryan Rodriguez | — | (760) 413 8675 | Windows, patio, painters | Desert Hot Springs · Riverside County | — | — |
| C C C Services INC | El Zein Hicham | — | (714) 758 0709 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| C C F Custom Comfort Flooring Company | Pedro Eliseo Vicente | — | (323) 793 6865 | Other | Moreno Valley · Riverside County | — | — |
| C C I | C C I | — | (760) 898 0450 | Other | Rancho Mirage · Riverside County | — | — |
| C C J Floor Covering | C C J Floor Covering | — | (951) 346 8164 | Other | Riverside · Riverside County | — | — |
| C C Orange | C C Orange | — | (949) 872 6290 | HVAC | Norco · Riverside County | — | — |
| C D C Electric | Christopher Daniel Coria | — | (951) 722 5058 | Electricians | Perris · Riverside County | — | — |
| C D Davis DBA C D Davis Construction Co | Cleo Dell Davis | — | (909) 597 2799 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| C D Magic Touch Remodeling | C D Magic Touch Remodeling | — | (818) 571 5362 | Electricians | Palm Desert · Riverside County | — | — |
| C D N Cabinets INC | Corey Douglas Newton | — | (951) 453 6970 | Other | Menifee · Riverside County | — | — |
| C E Hall Construction | Charles Edward Hall | cehallrealestate@aol.com | (912) 596-0583 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| C E Waterbury Corporation INC | Cory Edward Waterbury | — | (951) 833 1607 | Other | Corona · Riverside County | — | — |
| C Electric | Hout Leang Chhun | service@c-electric.com | (951) 567 3264 | Electricians | Moreno Valley · Riverside County | — | — |
| C F I General Contractor | C F I General Contractor | — | (951) 247 3410 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| C Figueroa Painting | Mendez Cruz Figueroa | — | (760) 296 2164 | Windows, patio, painters | Indio · Riverside County | — | — |
| C G Acoustics INC | Christopher Michael Ginter | — | (951) 458 0011 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| C G Electric | Gonzalez Christopher | — | (951) 255 4578 | Electricians | San Jacinto · Riverside County | — | — |
| C G Plumbing | C G Plumbing | — | (951) 723 0467 | Other | Quail Valley · Riverside County | — | — |