| Clark's Tree Service INC | Adam Benjamin Clark | — | (951) 927 0362 | Tree | Hemet · Riverside County | — | — |
| Clarke Heating & Cooling | Clarke Heating & Cooling | — | (951) 898 0339 | HVAC | Corona · Riverside County | — | — |
| Class Leasing LLC | Michael Angelo Bollero | — | (951) 943 1908 | GC, remodel, ADU | San Jacinto · Riverside County | — | — |
| Classic Alumawood Covers | Classic Alumawood Covers | — | (951) 674 8533 | Other | Murrieta · Riverside County | — | — |
| Classic Custom Woodworks | Classic Custom Woodworks | — | (760) 217 4763 | Other | Palm Springs · Riverside County | — | — |
| Classic Customs INC | Luis Arturo Castillo | — | (951) 371 0700 | GC, remodel, ADU | Corona · Riverside County | — | — |
| Classic Garage Doors & Openers | Classic Garage Doors & Openers | — | (760) 578 9046 | Other | Desert Hot Springs · Riverside County | — | — |
| Classic Handyman Services | Peter James Monteith | — | (951) 453 8945 | HVAC | Corona · Riverside County | — | — |
| Classic Homes | Classic Homes | — | (360) 621 2193 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Classic Installs INC | Dirk Wink Steffen | — | (951) 678 9906 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Classic Roofing LLC | Hector Alonso Herrera | — | (760) 880 1396 | Other roofers | Cathedral City · Riverside County | — | — |
| Classic Tile & Stone Specialists | Classic Tile & Stone Specialists | — | (951) 757 5091 | Other | Menifee · Riverside County | — | — |
| Classical Wood Works | Classical Wood Works | — | (951) 852 3043 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| Claude Chiricescu | Claude Chiricescu | — | (951) 719 0888 | Other | Temecula · Riverside County | — | — |
| Claudia Duran | Claudia Duran | — | (760) 835 2994 | Windows, patio, painters | Thousand Palms · Riverside County | — | — |
| Claudia's Painting | Claudia's Painting | — | (760) 406 2733 | GC, remodel, ADU | Desert Hot Springs · Riverside County | — | — |
| Clc Development | Clc Development | — | (951) 200 1984 | GC, remodel, ADU | Murrieta · Riverside County | — | — |
| Cld Demolition INC | Morales Daniel Martinez | — | (323) 629 2137 | Other | Riverside · Riverside County | — | — |
| Clean And Clear Pool And Spa Service | Heath Alan Ivers | — | (951) 326 5473 | Pool | Canyon Lake · Riverside County | — | — |
| Clean Coat Development | Clean Coat Development | — | (951) 801 0395 | GC, remodel, ADU | Moreno Valley · Riverside County | — | — |
| Clean Cut Construction | Pedro Jr Landin | — | (562) 201 8998 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| Clean Cut Lawn And Landscape Construction | Jacob Issac Pulido | — | (951) 375 7151 | Windows, patio, painters | Lake Elsinore · Riverside County | — | — |
| Clean Krete | Juan Miguel Iniguez | info@cleankrete.com | (866) 607 5550 | Windows, patio, painters | Wildomar · Riverside County | — | — |
| Clean Sweep Pool Service And Repair | Cameron Michael Wilson | — | (951) 302 2345 | Pool | Temecula · Riverside County | — | — |
| Cleansite Demolition LLC | Miguel Alfredo Rangel Davila | — | (951) 254 4044 | Other | Riverside · Riverside County | — | — |
| Clear And Blue Pool Service | Gerard Fredrick Albert | — | (951) 219 3564 | Pool | Temecula · Riverside County | — | — |
| Clear Choice Glass Mirror And Door | Tre Osborne Gudger | — | (951) 473 9429 | Windows, patio, painters | Menifee · Riverside County | — | — |
| Clear Winner Glass | Mark Matthew Higbie | — | (760) 989 2477 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| Clearhardt Windows | Anthony Junior Sifuentes | — | (951) 772 5463 | Windows, patio, painters | Perris · Riverside County | — | — |
| Clearly The Best Pools Service | Beau James Peltz | — | (909) 967 1177 | Pool | Palm Desert · Riverside County | — | — |
| Clearpoint Plumbing INC | Ricardo Vargas | — | (775) 250 9274 | Other | Temecula · Riverside County | — | — |
| Clearwater Pipeline INC | Eugene Ray Stewart | — | (951) 657 2829 | Other | Perris · Riverside County | — | — |
| Clearwater Pool Care | Clearwater Pool Care | — | (909) 239 8276 | Pool | Menifee · Riverside County | — | — |
| Clemco Plumbing | Clemco Plumbing | — | (714) 394 5678 | Other | Temecula · Riverside County | — | — |
| Clemente's Custom Woodwork | Cervantes Eduardo Clemente | — | (714) 552 8599 | Other | Moreno Valley · Riverside County | — | — |
| Cliff Fisher Electrical INC | Clifford Alan Fisher | — | (760) 327 4151 | Electricians | Palm Springs · Riverside County | — | — |
| Cliff Stone's Custom Floor Coverings | Cliff Stone's Custom Floor Coverings | — | (760) 567 4339 | Other | Thousand Palms · Riverside County | — | — |
| Clifford Diversified Management & Services INC | Chad Jay Clifford | — | (714) 863 3001 | Electricians | Menifee · Riverside County | — | — |
| Clifton Boyz INC | Shaun David Clifton | — | (949) 322 1025 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| Clima-tech LLC | Husein Aziz | — | (800) 848 0445 | HVAC | Norco · Riverside County | — | — |