| C B Construction | Corneliu Ioan Bancescul | — | (954) 452 6301 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| C B Electrical Solutions | Christopher Lawrence Berry | — | (909) 744 4698 | Electricians | Twin Peaks · San Bernardino County | — | — |
| C B H Construction | Christopher Bruce Hicks | — | (909) 214 8521 | GC, remodel, ADU | Blue Jay · San Bernardino County | — | — |
| C B Home Construction | German Cortez | — | (626) 664 1985 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| C B Home Construction INC | German Cortez | — | (626) 279 5657 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| C B Painting Company | Cesar Eduardo Barillas | — | (626) 893 8303 | Windows, patio, painters | Yucaipa · San Bernardino County | — | — |
| C B Waterproofing | C B Waterproofing | — | (909) 904 1180 | Other | Fontana · San Bernardino County | — | — |
| C C C Construction INC | Joe Chengfong Lee | — | (909) 465 3612 | Electricians | Upland · San Bernardino County | — | — |
| C C Fencing | C C Fencing | — | (909) 238 2256 | Other | Rialto · San Bernardino County | — | — |
| C C R Construction Co | Cesar Chavez Romero | — | (760) 985 9781 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| C C S Refrigeration | C C S Refrigeration | — | (909) 556 8185 | HVAC | San Bernardino · San Bernardino County | — | — |
| C E & U Construction | Frank Lawrence Connelly | info@ceuconstruction.com | (760) 617 9745 | Other | Hesperia · San Bernardino County | — | — |
| C E Mechanical INC | David Michael Tickenoff | — | (909) 548 0925 | HVAC | Chino · San Bernardino County | — | — |
| C E Whitney Construction | Christopher Eugene Whitney | — | (951) 314 7796 | GC, remodel, ADU | Highland · San Bernardino County | — | — |
| C F Electric | Fierros Carlos | — | (909) 659 9103 | Electricians | San Bernardino · San Bernardino County | — | — |
| C F Garage Door | C F Garage Door | — | (909) 827 9452 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| C H & P General Construction | Arreola Moises Hernandez | — | (909) 562 5539 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| C H E C Construction INC | Frank Richard Rosales | — | (909) 921 8806 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| C Jr's Flooring INC | Clemente Jr Collazo | — | (909) 991 9959 | Other | San Bernardino · San Bernardino County | — | — |
| C K Fencing | C K Fencing | — | (909) 585 8838 | Other | Big Bear Lake · San Bernardino County | — | — |
| C K P Enterprise | C K P Enterprise | — | (951) 317 4147 | Electricians | Hesperia · San Bernardino County | — | — |
| C L D Construction | Arthur Matthew De Soto | — | (909) 635 5701 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| C L Petty Floor Covering | C L Petty Floor Covering | — | (909) 792 3091 | Other | Redlands · San Bernardino County | — | — |
| C L S Landscape Management INC | Kevin Lee Davis | — | (909) 628 3005 | GC, remodel, ADU | Montclair · San Bernardino County | — | — |
| C L Silva Construction | Christopher Louis Silva | — | (909) 659 1313 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| C M B Structures INC | Stephen Anthony Sullivan | contact@cmbstructures.com | (909) 980 4538 | Other | Alta Loma · San Bernardino County | — | — |
| C M C Construction | Kenneth Hugh Berry | — | (760) 559 7138 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| C M C Rebar | Daniel Wayne Garza | — | (909) 713 1130 | Other | San Bernardino · San Bernardino County | — | — |
| C M Construction General Contractors INC | Carlos Aruajo Cabrera | — | (909) 464 8400 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| C M Custom Millwork | C M Custom Millwork | cmcustommillwork@gmail.com | (909) 242 3324 | Other | Chino Hills · San Bernardino County | — | — |
| C M Peich INC | Christian Michael Peich | — | (909) 597 6200 | Other | Chino · San Bernardino County | — | — |
| C M R Roofing Construction | Chadd Christopher Redfearn | — | (909) 702 2212 | Other roofers | Upland · San Bernardino County | — | — |
| C M Tile INC | Manuel Michael Castillo | — | (909) 358 5897 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| C N A Electric | Juan Carlos Perez Lopez | — | (760) 905 4100 | Electricians | Hesperia · San Bernardino County | — | — |
| C N D Design Builders | C N D Design Builders | — | (909) 952 4497 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| C N K Cornerstone INC | Sun Mi Kwon | — | (909) 855 0855 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| C N M Construction L L C | Nick Henry Meelker | — | (909) 831 1202 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| C P C INC | Charles Michael Pfister | — | (909) 981 1091 | Other | Upland · San Bernardino County | — | — |
| C P Construction Co INC | Mark Everett Pfister | — | (909) 981 1091 | Other | Ontario · San Bernardino County | — | — |
| C P K Flooring Contractor | C P K Flooring Contractor | — | (714) 931 0866 | Other | Chino · San Bernardino County | — | — |