| Closet Finish | Closet Finish | — | (909) 553 6980 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Cloud City Construction INC | Casey Shane Schiefelbein | casey@cloudcitycc.com | (714) 930 5469 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Clovic Construction | Jessie Ramirez | — | (866) 335 8205 | Electricians | Colton · San Bernardino County | — | — |
| Cm Custom Paint And Stain | Cm Custom Paint And Stain | — | (714) 225 6266 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Cm Electric Services INC | Jose Luis Sandova Serna | office@cmelectricservices.com | (323) 246 0830 | Electricians | Fontana · San Bernardino County | — | — |
| Cmd Electric INC | Hany Ibrahim Dimitry | — | (909) 628 7773 | Electricians | Ontario · San Bernardino County | — | — |
| Cmm AC | Christopher James Robinson | — | (909) 552 0654 | HVAC | Hesperia · San Bernardino County | — | — |
| Cnc Pool Construction LLC | Christopher John Cowles | — | (951) 283 7983 | Pool | Grand Terrace · San Bernardino County | — | — |
| Cnp Landscape Co | Zhao Yan | — | (951) 733 3769 | Windows, patio, painters | Rialto · San Bernardino County | — | — |
| Cnx Concrete Construction | Christopher Andrew Moss | — | (951) 824 0526 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Coach Construction | Anwar Zahir Shah | — | (909) 749 5681 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Coaches Plumbing | Coaches Plumbing | coachesplumbing@gmail.com | (951) 977 0457 | Other | San Bernardino · San Bernardino County | — | — |
| Coast Management Construction | Garcia Rafael | — | (714) 273 9943 | GC, remodel, ADU | Joshua Tree · San Bernardino County | — | — |
| Coast Recreation INC | Jack Lee Striegel | accopunting@coastrecreation.com | (909) 329-9559 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Coast Refrigeration & Service LLC | Esteban Monarrez Navarro | — | (760) 404 7302 | HVAC | Victorville · San Bernardino County | — | — |
| Coast To Coast Custom Designs INC | Lucia Belen Solis | — | (323) 506 7628 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Coast To Coast Green Energy INC | Paul Hubert Siler | — | (949) 514 2962 | Electricians | Redlands · San Bernardino County | — | — |
| Coast To Coast Plumbing Co | Ulices Lagunas | dispatchexperienceplumbing@gmail.com | (909) 242 5592 | Other | Victorville · San Bernardino County | — | — |
| Coast Water Systems INC | Bryan Bustamante | — | (909) 428 4680 | Other | Fontana · San Bernardino County | — | — |
| Coastal Boiler Works INC | Ryan Anthony Clavell | — | (562) 618 9514 | HVAC | Oak Hills · San Bernardino County | — | — |
| Coastal Breeze A/c | Coastal Breeze A/c | — | (808) 870 5393 | HVAC | Mentone · San Bernardino County | — | — |
| Coastal Construction | Cherie Ann French | — | (909) 476 2496 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| Coastal Crest Design And Construction | Ping Li | — | (415) 819 0076 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Coastline Construction & Development INC | Richard Edward Simmons | — | (714) 402 4700 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Coastline Outdoor Solutions | Coastline Outdoor Solutions | — | (909) 224 0133 | Windows, patio, painters | Ontario · San Bernardino County | — | — |
| Coastline Tile And Shower | Coastline Tile And Shower | — | (800) 313 1548 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Coati Construction INC | Lonnie Robert Herrell | — | (760) 644 0748 | GC, remodel, ADU | Phelan · San Bernardino County | — | — |
| Cobalt Electric | Michael Vernon Knepper | — | (909) 702 8541 | Electricians | Rialto · San Bernardino County | — | — |
| Cobra Fire Protection | Cobra Fire Protection | info@cobrafireprotection.com | (909) 224 3742 | Other | Chino · San Bernardino County | — | — |
| Coburn Equipment INC | Raymond Jay Coburn | — | (909) 591 6417 | Other | Chino · San Bernardino County | — | — |
| Coddington Const | Coddington Const | — | (760) 713 3461 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Code 4 Roofing Specialist LLC | Paris Kathleen Hernandez | — | (626) 824 1843 | Other roofers | Upland · San Bernardino County | — | — |
| Code Green Energy Management | Code Green Energy Management | — | (909) 268 9552 | HVAC | Fontana · San Bernardino County | — | — |
| Codiak Plumbing Services | Coty Sterling Carr | — | (909) 435 7865 | Other | Yucaipa · San Bernardino County | — | — |
| Cody Gomez Construction | Cody David Gomez | — | (909) 436 8151 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| Cody Johnstone Tree Care | Cody Johnstone Tree Care | — | (707) 502 8624 | Tree | Running Springs · San Bernardino County | — | — |
| Cody Madden DBA Goodpwr | Cody Madden DBA Goodpwr | — | (626) 826 9850 | Electricians | Upland · San Bernardino County | — | — |
| Coin Construction | Trino Jesse Padilla | — | (909) 915 9759 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Cold Desert | Cold Desert | — | (760) 559 3365 | HVAC | Victorville · San Bernardino County | — | — |
| Cold War Refrigeration INC | Andrew Edward James | — | (909) 536 3736 | HVAC | Chino Hills · San Bernardino County | — | — |