| Corrington Construction | Steven Jess Corrington | — | (909) 982 2349 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Corso Construction INC | Steven Lorence Weitz | — | (760) 609 6551 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Cortes & Lee INC | Gregory Charles Lee | — | (909) 963 6948 | Other | Hesperia · San Bernardino County | — | — |
| Cortez Construction | Cortez Ruben | — | (805) 423 1464 | GC, remodel, ADU | Helendale · San Bernardino County | — | — |
| Cortez Ornamental Iron Corp | Lucas Jr Cortez | cortezornamentaliron@live.com | (909) 862 8201 | Other | Highland · San Bernardino County | — | — |
| Cortez Paving INC | Alexander Isaiah Cortez | — | (909) 649 3565 | Other | Redlands · San Bernardino County | — | — |
| Cory J Williams Construction | Cory John Williams | — | (626) 826 8946 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Cosmos Unlimited Construction INC | David Minwoo Jeong | — | (714) 321 5933 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Coss Heating & Air Conditioning | Mario Alberto Coss-Nunez | — | (310) 648 4793 | HVAC | San Bernardino · San Bernardino County | — | — |
| Cossey Construction | Stephen Alexander Cossey | — | (626) 484 9021 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| Cossey INC DBA M & M Electric Co | Kevin Lain Cossey | — | (909) 208 8499 | Electricians | Upland · San Bernardino County | — | — |
| Costa Turf Artificial Grass And Landscaping | Mark Albian Shumate | — | (909) 773 2649 | Windows, patio, painters | Upland · San Bernardino County | — | — |
| Cota Electrical Contracting | Timothy Ryan Cota | — | (951) 544 6053 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Cota's Tree Service INC | Elwin Noel Inzunza Cota | — | (909) 208 5156 | Tree | San Bernardino · San Bernardino County | — | — |
| Cote Building & Repair | Cote Building & Repair | — | (909) 908 8204 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Cottages To Castles | Cottages To Castles | rentals@cottages-to-castles.com | (951) 314 3018 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| Cotten Construction | Michael Richard Cotten | — | (909) 794 6206 | Other | Mentone · San Bernardino County | — | — |
| Courtesy Air | Courtesy Air | — | (909) 864 4401 | HVAC | Highland · San Bernardino County | — | — |
| Courtesy Av | Courtesy Av | — | (760) 486 6656 | Other | Apple Valley · San Bernardino County | — | — |
| Courtney's Electrical Services | Roy Wayne Courtney | — | (951) 367 6403 | Electricians | Yucaipa · San Bernardino County | — | — |
| Cova Concrete | Jorge Correa | info@covaconcrete.com | (909) 637 4200 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Cova Construction INC | Rosa Maria Alcala | — | (909) 545 6445 | Other | Ontario · San Bernardino County | — | — |
| Covarrubias Corp | Rachel Cloe Covarrubias | firstname@covarrubias.com | (909) 637 8844 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Coverall Restoration INC DBA Servpro Of Colton | Ly Sanh Thong | — | (909) 514 1900 | GC, remodel, ADU | Grand Terrace · San Bernardino County | — | — |
| Covey Shipcott | Frank Mallozzi | — | (909) 989 7527 | Other | Alta Loma · San Bernardino County | — | — |
| Coville Electric LLC | Wyatt James Coville | info@solarpowerfontana.com | (909) 964 6135 | Electricians | Fontana · San Bernardino County | — | — |
| Cowboy Concrete | Viridiana Janet Pineda Cuevas | interested@domainmarket.com | (714) 478 4535 | Other | Rialto · San Bernardino County | — | — |
| Cowboy's Crew Construction | Antonio Zuniga Saucedo | — | (909) 472 1055 | GC, remodel, ADU | Rimforest · San Bernardino County | — | — |
| Cox Commerical & Industrial INC | Robert Lee Cox | — | (909) 239 0780 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Cox Homes | Cox Homes | — | (760) 361 9190 | GC, remodel, ADU | Landers · San Bernardino County | — | — |
| Cox Plumbing INC | Chris Curtis Cox | — | (760) 217 8540 | Other | Victorville · San Bernardino County | — | — |
| Cozy Heating And Air Conditioning | Cozy Heating And Air Conditioning | — | (909) 213 2163 | HVAC | Redlands · San Bernardino County | — | — |
| Cp All Around Acrylic & Fiber Tub Fix | Juan Francisco Preciado Barboza | — | (760) 267 3315 | Other | Apple Valley · San Bernardino County | — | — |
| Cp Elite Painting | Abril Azalia Flores | — | (909) 855 2940 | Windows, patio, painters | Mentone · San Bernardino County | — | — |
| Cp Power Electric | Patricia Martinez | — | (626) 400 0095 | Electricians | Rialto · San Bernardino County | — | — |
| Cp Stone Tile INC | Pablo Ramon Carlos | — | (626) 274 2373 | Other | Colton · San Bernardino County | — | — |
| Cpc Custom Painting Corporation | Mendoza Miguel Ayala | — | (909) 526 0069 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Cpl Construction INC | Helen Wei Chen | — | (909) 515 9777 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Cpr Remediation | Christopher Adam Chacon | — | (909) 782 5669 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Cr Cabinets & Woodworks | Cr Cabinets & Woodworks | — | (909) 528 5528 | Other | Yucaipa · San Bernardino County | — | — |