| Calcraft Corporation | Daniel Steven Ensman | — | (909) 879 2900 | Electricians | Rialto · San Bernardino County | — | — |
| Calderon Plumbing | Calderon Plumbing | — | (909) 945 9494 | Other | Alta Loma · San Bernardino County | — | — |
| Caldwell Construction | Rob Hamilton Caldwell | sean@caldwellconstruction.com | (805) 845-7555 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Caldwell Electric Incorporated | Terry Lynn Caldwell | — | (909) 336 9518 | Electricians | Twin Peaks · San Bernardino County | — | — |
| Caley's Mirror And Glass Design | Caley's Mirror And Glass Design | — | (760) 819 1615 | Windows, patio, painters | Yucca Valley · San Bernardino County | — | — |
| Cali Central Mechanical HVAC | Cali Central Mechanical HVAC | — | (909) 708 5150 | HVAC | San Bernardino · San Bernardino County | — | — |
| Cali Commercial Refrigeration | Cali Commercial Refrigeration | — | (909) 648 8176 | HVAC | Fontana · San Bernardino County | — | — |
| Cali Construction Renovation LLC | Hernandez Joel | — | (909) 670 4547 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Cali Custom Cabinets | Cali Custom Cabinets | — | (626) 523 7617 | Other | Fontana · San Bernardino County | — | — |
| Cali Electric Chargers INC | Jose Max Aguirre | — | (562) 888 6558 | EV chargers | Adelanto · San Bernardino County | — | — |
| Cali Fence Co | Gaspar Aaron Diaz Gomez | — | (760) 706 8674 | Other | Oak Hills · San Bernardino County | — | — |
| Cali Window Coverings LLC | Valdemar Garcia Gusman | eben@eyebytes.com | (562) 659 2772 | Other | Ontario · San Bernardino County | — | — |
| Cali's Elite Flooring INC | Gerardo Montes | — | (909) 329 4947 | Other | Colton · San Bernardino County | — | — |
| Caliber Drywall | Caliber Drywall | — | (909) 573 6481 | Other | Ontario · San Bernardino County | — | — |
| Caliber Electrical Services INC | Aceves Steve | — | (909) 746 7762 | Electricians | Highland · San Bernardino County | — | — |
| Caliber Garage Doors | Caliber Garage Doors | — | (909) 322 1160 | Other | Upland · San Bernardino County | — | — |
| Caliber Garage Doors INC | William Albert Haigh | — | (909) 949 0335 | Other | Montclair · San Bernardino County | — | — |
| Caliber Painting Pros INC | Guerrero Elias Vazquez | — | (951) 721 9430 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| Caliber Painting Services | Cesar Eliceo Cardozo | — | (951) 490 5174 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| Caliber Shutters | Caliber Shutters | — | (909) 648 5174 | Other | Highland · San Bernardino County | — | — |
| Calico Painting | Calico Painting | deansandoval56@gmail.com | (760) 247 3553 | Windows, patio, painters | Apple Valley · San Bernardino County | — | — |
| Calico Water Works | Calico Water Works | — | (909) 261 3042 | Other | Victorville · San Bernardino County | — | — |
| California Adu Professional | California Adu Professional | — | (909) 728 6560 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| California Air Conditioning & Heating Corp | Oscar Estrada Leon | — | (909) 672 0411 | HVAC | Highland · San Bernardino County | — | — |
| California Air Power | Suman Chetan Sagar | — | (909) 996 1618 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| California Arbor Care INC | Michael James Parker | — | (909) 590 4100 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| California Blaze Protection LLC | Ruben Jose Perez | info@californiablazeprotection.com | (909) 921 5303 | Other | Ontario · San Bernardino County | — | — |
| California Builder's Construction INC | Guadalupe Flores | — | (909) 802 5416 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| California Builders & Design INC | Christopher | — | (909) 810 1140 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| California Building Service & Maintenance INC DBA California | Summer Starr Foss | — | (909) 204 2242 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| California Chiller | Joseph Allen Philman | — | (909) 680 1980 | HVAC | Chino Hills · San Bernardino County | — | — |
| California Complete Asphalt Services | Raul G Villarreal | — | (951) 733 7309 | Other | Ontario · San Bernardino County | — | — |
| California Concrete Cleaning INC | Sandford Gray Dincolo | — | (909) 980 5117 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| California Concrete Plus INC | Irvin Jose Diaz | irvin@californiaconcreteplusinc.com | (909) 217 8402 | Other | Chino Hills · San Bernardino County | — | — |
| California Construction | Jose Juan Morales | — | (626) 297 2606 | HVAC | Chino · San Bernardino County | — | — |
| California Curb And Landscape Co | Steven Ray Decker | — | (760) 524 1344 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| California Curb Appeal Real Property Specialists Inc. | California Curb Appeal Real Property Specialists Inc. | — | (909) 601-7069 | Property managers | San Bernardino · San Bernardino County | — | — |
| California Custom Landscape INC | Anna Aurora Rodriguez | — | (909) 465 6515 | Windows, patio, painters | Chino · San Bernardino County | — | — |
| California Custom Roofing | Daniel Lee Lilla | — | (909) 708 7230 | Other roofers | San Bernardino · San Bernardino County | — | — |
| California Door Doc | California Door Doc | — | (909) 565 3115 | Other | Ontario · San Bernardino County | — | — |