| Callison Construction | William John Callison | — | (951) 313 3502 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| Calmar Construction INC | Estrada Omar | — | (909) 749 9652 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Calmex Engineering INC | Robert Joseph Stone | — | (909) 546 1311 | Other | Bloomington · San Bernardino County | — | — |
| Calpoint Construction INC | Yongshuang Liang | — | (626) 757 2132 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Calstate Pipeline Engineering | Tovar Adam | — | (626) 523 2004 | Other | Chino Hills · San Bernardino County | — | — |
| Caltek Technologies | Avelino Borra Geaga | info@caltektechnologies.com | (909) 295 3400 | Other | Ontario · San Bernardino County | — | — |
| Caltex Backflow | Erick Dario Dieguez Fitz | — | (714) 865 5286 | Other | Chino Hills · San Bernardino County | — | — |
| Calwest Building INC | Stephen Edward Stillings | — | (951) 990 5861 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| Calwest Steel | Van Syverud | — | (909) 305 4824 | Other | Fontana · San Bernardino County | — | — |
| Cam's Window Fashions | Cam's Window Fashions | — | (909) 772 5805 | Other | Chino Hills · San Bernardino County | — | — |
| Camacho Concrete Construction | Raul Ramos Camacho | — | (909) 578 6358 | Other | Bloomington · San Bernardino County | — | — |
| Camacho Construction | Regalado Maira | — | (310) 345 1908 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Camacho General Construction | Rodriguez Jesus Camacho | — | (909) 436 6324 | GC, remodel, ADU | Big Bear City · San Bernardino County | — | — |
| Camacho Prolific Renovations A Landscaping Co | Alonso Arturo Camacho | — | (760) 577 3067 | Windows, patio, painters | Barstow · San Bernardino County | — | — |
| Camacho's Roofing INC | Angel Armando Camacho Delgado | support@contractorwebzone.com | (951) 441 4756 | Other roofers | Colton · San Bernardino County | — | — |
| Camargo Construction | Camargo Jesse | — | (760) 985 2182 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Camarillo Concrete Construction | Joann Angela Camar Encinas | camarilloconcreteconstruction@gmail.com | (909) 641 3222 | Windows, patio, painters | Redlands · San Bernardino County | — | — |
| Camarin Stone | Camarin Stone | — | (909) 357 9400 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Camco | Ryan Dee Cameron | — | (928) 577 1755 | GC, remodel, ADU | Needles · San Bernardino County | — | — |
| Camco Builders | Camco Builders | — | (760) 955 6629 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| Camejos Construction INC | Jesus Daniel Camejo | — | (310) 689 8477 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Cameron John Porto | Cameron John Porto | — | (760) 902 6480 | Windows, patio, painters | Big Bear Lake · San Bernardino County | — | — |
| Campbell Construction | Teresa Lynne Campbell | — | (909) 591 4300 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Campos Framing | Campos Framing | — | (909) 292 7429 | Other | San Bernardino · San Bernardino County | — | — |
| Cams Systems | Christopher Armando Martinez Macias | — | (909) 659 6334 | Other | San Bernardino · San Bernardino County | — | — |
| Can't Top Us Window Fashions | Can't Top Us Window Fashions | — | (750) 668 9366 | Other | Yucca Valley · San Bernardino County | — | — |
| Canam Ergonomics INC | Jack Robert Jr Atkinson | — | (909) 796 1183 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Canary Mid Century Construction LLC | Robert Ray Graves | — | (909) 562 2428 | GC, remodel, ADU | Montclair · San Bernardino County | — | — |
| Canchola Team Construction INC | Angel Moises Canchola | — | (626) 756 5074 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| Canela Electric INC | Eduardo Israel Canela Bautista | — | (424) 213 9497 | Electricians | San Bernardino · San Bernardino County | — | — |
| Canevari Custom Homes LLC | Anthony Joseph Canevari | — | (562) 417 7413 | GC, remodel, ADU | Hesperia · San Bernardino County | — | — |
| Cano Architecture Concrete Repair | Cano Architecture Concrete Repair | — | (909) 627 5477 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Canseco Electrical Contracting Incorporated | Canseco Genaro Martinez | — | (657) 600 8151 | Electricians | Ontario · San Bernardino County | — | — |
| Cantrells Heating And Air Conditioning | Jacob Scott Straffin | — | (909) 338 2520 | HVAC | Twin Peaks · San Bernardino County | — | — |
| Cantu Concrete Pumping | Cantu Concrete Pumping | — | (909) 273 4094 | Other | Big Bear City · San Bernardino County | — | — |
| Cap Angeles Construction INC | Cornelio Angeles | — | (323) 202 3362 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Cap Painting | Cap Painting | — | (909) 357 1105 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Capasso Construction INC | Steven Francis Ii Capasso | — | (909) 276 1012 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Capiro's Plumbing & Construction INC | Ruben Dario Padilla | — | (909) 630 5481 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| Capital Shotcrete Company | Hernandez Arnulfo | — | (909) 489 5541 | Other | Adelanto · San Bernardino County | — | — |