| Crowning Touch Moulding & Synthetics | Daniel Jesse Rudolf | — | (951) 775 2033 | Other | Wildomar · Riverside County | — | — |
| Crownpointe Building Services LLC | Gerardo Garcia | — | (951) 254 6200 | GC, remodel, ADU | Perris · Riverside County | — | — |
| Crs | William Ira Sachs | — | (951) 538 6411 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Cruz Brothers Custom Painting INC | Pedro Cruz | — | (714) 399 5869 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Cruz Brothers Granite & Tile | Acevedo Angel Cruz | — | (951) 570 3851 | Other | San Jacinto · Riverside County | — | — |
| Cruz Concepts Cabinetry | Cruz Concepts Cabinetry | — | (310) 650 0276 | Other | Murrieta · Riverside County | — | — |
| Cruz Concrete | Cruz Concrete | — | (909) 563 0539 | Other | Perris · Riverside County | — | — |
| Cruz Construction & Repair INC | Jose Luis Sandova Serna | — | (909) 721 0153 | Electricians | Jurupa Valley · Riverside County | — | — |
| Cruz Landscape | Feliciano Armando Cruz-Acevedo | — | (951) 999 2316 | Windows, patio, painters | San Jacinto · Riverside County | — | — |
| Crv Plumbing | Crv Plumbing | — | (760) 989 5391 | Other | Mecca · Riverside County | — | — |
| Cryo HVAC LLC | Loy Mitchell Ii Lowry | — | (562) 316 8718 | HVAC | Corona · Riverside County | — | — |
| Cryoworks INC | Matthew John Miller | — | (951) 965 0136 | Other | Jurupa Valley · Riverside County | — | — |
| Crystal Clear Construction | Lance Brian Remington | — | (951) 533 4274 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Crystal Clear Mirror & Glass | Crystal Clear Mirror & Glass | — | (760) 343 1633 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Crystal Court Construction INC | Danny Lee Dolan | crystalcourtconstruction@gmail.com | (951) 894 6840 | Electricians | Wildomar · Riverside County | — | — |
| Cs Patio Covers INC | Christian Angulo | — | (760) 625 4225 | Other | La Quinta · Riverside County | — | — |
| Csc Landscaping | Csc Landscaping | — | (760) 970 2570 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Csm Construction | Everardo Juan Ortiz | — | (951) 250 4066 | GC, remodel, ADU | Canyon Lake · Riverside County | — | — |
| Csr Synthetic Coat Refinishing | Patricia Guadalupe Vazquez Salazar | — | (951) 462 9574 | Other | Riverside · Riverside County | — | — |
| Ct Refrigeration | Chris Dwayne Thrower | — | (951) 830 3484 | HVAC | Corona · Riverside County | — | — |
| Ctf Builders INC | Thomas Joseph Brooks | — | (626) 862 2733 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Cts General Contracting | Cade Alfred-Jay Swenson | — | (951) 332 3951 | GC, remodel, ADU | Menifee · Riverside County | — | — |
| Cts Refrigeration | Ivan Garcia | — | (909) 853 3390 | HVAC | Jurupa Valley · Riverside County | — | — |
| Cuellar Grading & Excavating | Cuellar Grading & Excavating | — | (951) 203 3911 | Other | Temecula · Riverside County | — | — |
| Cuevas Remodeling | Cuevas Remodeling | — | (323) 690 8152 | GC, remodel, ADU | Indio · Riverside County | — | — |
| Culligan Water Conditioning | Benjamin Charles Croel | — | (760) 922 5701 | Other | Blythe · Riverside County | — | — |
| Culwell Abrasive INC | Michael Gary Culwell | — | (909) 277 2724 | Other | Corona · Riverside County | — | — |
| Cumulus Resources Corporation | Lois Marie Webb | — | (951) 263 6353 | HVAC | Lake Elsinore · Riverside County | — | — |
| Cunamay Communications LLC | Nathaniel David Cunamay | — | (619) 771 5744 | Other | Moreno Valley · Riverside County | — | — |
| Cunningham Painting | Cunningham Painting | — | (760) 218 9212 | Windows, patio, painters | Cathedral City · Riverside County | — | — |
| Cunningham-davis Corp | Jacqueline Elaine Davis | — | (909) 795 5090 | Other | Calimesa · Riverside County | — | — |
| Cura Termite & Pest Control - Riverside | Cura Termite & Pest Control - Riverside | — | (951) 373-6604 | Pest, tile roofs | Riverside · Riverside County | — | — |
| Curb Sawing Company | James Henry Iii Hamilton | — | (760) 320 1799 | Other | Cathedral City · Riverside County | — | — |
| Curb Tech | Curb Tech | curbtech2015@gmail.com | (951) 780 4998 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Curbrite Addressing Service | Timothy Eugene Major | — | (562) 481 4451 | Other | Corona · Riverside County | — | — |
| Curci Site Solutions | Gregory Matthew Curci | — | (760) 427 9258 | Other | Bermuda Dunes · Riverside County | — | — |
| Curdes Pools | Curdes Pools | — | (760) 574 3711 | Pool | Indio · Riverside County | — | — |
| Curious Contractors LLC | Adeline Consepcion Ramirez | — | (951) 347 4711 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| Current Electric And Lighting | Timothy Paul Torres | — | (951) 692 2421 | Electricians | Corona · Riverside County | — | — |
| Current Electric Technologies INC | Roberto Estrada | — | (951) 897 0691 | Electricians | Riverside · Riverside County | — | — |