| C P R A+construction | Humberto Gastelum | — | (661) 544 2184 | GC, remodel, ADU | San Bernardino · San Bernardino County | — | — |
| C R B Construction INC | C R B Construction INC | — | (714) 900 1818 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| C R Grading And Equipment | Cody Van Rash | — | (951) 453 9753 | Other | Chino · San Bernardino County | — | — |
| C R Home Remodel LLC | Regalado Alvaro Velez | eben@eyebytes.com | (909) 630 2054 | GC, remodel, ADU | Colton · San Bernardino County | — | — |
| C R M Electric | Charles Robert Jr Mansfield | — | (951) 662 7815 | Electricians | Yucaipa · San Bernardino County | — | — |
| C R Mechanical | C R Mechanical | — | (626) 392 6988 | HVAC | Upland · San Bernardino County | — | — |
| C R N INC | Jeffrey Scott Barker | — | (909) 210 6201 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| C R P Plumbing Company Incorporated | Jan Kim Pine | — | (909) 307 6255 | Other | Redlands · San Bernardino County | — | — |
| C R Specialist | C R Specialist | — | (951) 906 1436 | Other | San Bernardino · San Bernardino County | — | — |
| C R T Roofing Co | Jorge Luis Solano Espinoza | info@crtroofing.com | (909) 566 4036 | Other roofers | Bloomington · San Bernardino County | — | — |
| C S A Pavers | C S A Pavers | — | (909) 647 6843 | Other | Victorville · San Bernardino County | — | — |
| C S Construction | Corey Leon Stratton | — | (760) 559 8138 | Other roofers | Hesperia · San Bernardino County | — | — |
| C S General Contracting INC | Timothy Kaipo Aiu | tim@webuildca.com | (951) 264 8873 | GC, remodel, ADU | Chino Hills · San Bernardino County | — | — |
| C S I S | Brian Paul Gaglia | — | (909) 370 4200 | Electricians | Colton · San Bernardino County | — | — |
| C S R Air Conditioning & Heating INC | Mark Eric Lewis | — | (909) 862 8600 | HVAC | Highland · San Bernardino County | — | — |
| C S Tile | C S Tile | — | (909) 376 3393 | Other | Upland · San Bernardino County | — | — |
| C Smith Transport INC DBA C S T Organic Recycling | Scot Philip Smith | — | (909) 794 3476 | Tree | Redlands · San Bernardino County | — | — |
| C T Construction | Che Leng Tang | — | (909) 856 9967 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| C T General Contracting | Christopher Diego Terres | — | (760) 821 5003 | GC, remodel, ADU | Yucca Valley · San Bernardino County | — | — |
| C T H Construction | Christopher Timothy Hearn | — | (909) 273 4679 | GC, remodel, ADU | Big Bear City · San Bernardino County | — | — |
| C T S Mechanical INC | James Morgan Lund | — | (909) 465 6361 | HVAC | Chino · San Bernardino County | — | — |
| C T Tile | C T Tile | — | (909) 754 1875 | Other | Mentone · San Bernardino County | — | — |
| C V Builder | C V Builder | — | (909) 528 5143 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| C W Construction INC | Wayne Scott Carey | — | (909) 989 9099 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| C W Framing INC | Wayne Scott Carey | — | (909) 989 9099 | GC, remodel, ADU | Alta Loma · San Bernardino County | — | — |
| C Y Electrical And Lighting | Jauregui Carlos | — | (661) 317 0320 | Electricians | Victorville · San Bernardino County | — | — |
| C&c Air INC | Najera William Ortega | — | (909) 306 6390 | HVAC | Chino · San Bernardino County | — | — |
| C&g New Generation Roofing INC | Elvin Alexander Camacho Renderos | contact@cgnewgenerationroofing.com | (760) 686 5611 | Other roofers | Victorville · San Bernardino County | — | — |
| C&r Dinasty Corporation | Carlos Rafael Rangel | — | (909) 653 3943 | GC, remodel, ADU | Fontana · San Bernardino County | — | — |
| C-10 Electric | Dung Quoc Do | service@c-electric.com | (626) 421 0439 | Electricians | Montclair · San Bernardino County | — | — |
| C-20 Air Heating & Air Conditioning | Juan Carlos Menera | — | (909) 471 9026 | HVAC | Rialto · San Bernardino County | — | — |
| C-lo Construction | Christopher Paul Lopez | — | (949) 254 2168 | GC, remodel, ADU | Redlands · San Bernardino County | — | — |
| C-rod Pipeline INC | Carlos Anthony Rodriguez | — | (909) 609 6460 | Other | Yucaipa · San Bernardino County | — | — |
| C.w. Rollman Construction | Casey Wallace Rollman | — | (909) 973 7822 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| C2e Construction INC | Randy Lawrence Hall | — | (323) 587 0120 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Ca Plumbing Tech INC | Jose Carlos Ortega | — | (626) 367 0543 | Other | Chino · San Bernardino County | — | — |
| Ca-buenfil Landscape Planning | Ca-buenfil Landscape Planning | — | (909) 516 4898 | Windows, patio, painters | Chino Hills · San Bernardino County | — | — |
| Caba Contractors INC | Cecilio Cardenas | — | (909) 520 2709 | GC, remodel, ADU | Rialto · San Bernardino County | — | — |
| Caballero's Reglaze Service | Maria De Jesus Rodriguez Zambrano | — | (909) 731 8940 | Other | San Bernardino · San Bernardino County | — | — |
| Cabinet Factories Outlet - Redlands INC | Jeffery Thomas Deming | — | (909) 748 0889 | Other | Redlands · San Bernardino County | — | — |