| C&r Property Service Builder | Gordon Douglas Vician | — | (949) 413 9865 | GC, remodel, ADU | Orange · Orange County | — | — |
| C&s Construction INC | Choi Duk Soo | — | (714) 287 7002 | Electricians | Costa Mesa · Orange County | — | — |
| C.c Construction | Cho Chunghyun | — | (213) 944 7816 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| C.r.i Electric | Dwayne Michael Holder | gcollier@crielectric.com | (714) 632 3703 | Electricians | Anaheim · Orange County | — | — |
| C2 Rem | Edmond Francis Bourke | — | (949) 261 8098 | Other | Costa Mesa · Orange County | — | — |
| C2mod | James Byron Cleveland | — | (562) 567 6775 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| C3 Corporate Management INC | James Joseph Palmeri | — | (949) 215 1133 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| Ca Eagle Construction INC | Xiongyi Zheng | — | (949) 569 5777 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Ca Floor Pro | Esteban Mendoza | — | (914) 981 0678 | Other | Santa Ana · Orange County | — | — |
| Ca Home Art INC | Yong Shik Han | — | (714) 709 3457 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Ca House Corp | Shaohua Wang | — | (949) 674 0777 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Ca Kitchens Floors & Baths INC | Vince Elie Doche | — | (714) 632 1111 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Ca Mathes Construction LLC | Chad Andrew Mathes | — | (949) 412 3795 | Other | Laguna Niguel · Orange County | — | — |
| Ca Native Landscaping | Ca Native Landscaping | — | (714) 742 9567 | Windows, patio, painters | Cypress · Orange County | — | — |
| Ca Resurfacing | Ca Resurfacing | — | (714) 913 3395 | Other | Orange · Orange County | — | — |
| Ca20 Developers INC | Majid Salimkhani | — | (323) 481 5859 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Caa Electric INC | Christian Andree Alvarado | support@caaelectric.com | (323) 496 1839 | Electricians | La Habra · Orange County | — | — |
| Caballero A1 Construction | Ricardo Quiroz Caballero | — | (714) 868 1475 | Electricians | Los Alamitos · Orange County | — | — |
| Cabeo Construction INC | Alonso De Jesus Ortiz | info@cabeoconstruction.com | (714) 709 6265 | GC, remodel, ADU | Villa Park · Orange County | — | — |
| Cabifornia INC | Mohammadi Saeed | — | (949) 308 3137 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Cabinet And Closet | Cabinet And Closet | — | (949) 280 4647 | Other | Laguna Woods · Orange County | — | — |
| Cabinet Exchange | Cabinet Exchange | — | (714) 616 2805 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Cabinet Express | Cabinet Express | — | (714) 392 9912 | Other | Huntington Beach · Orange County | — | — |
| Cabinet Flooring & Bath Design | Heidari Sasan | — | (949) 617 2272 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |
| Cabinet Magic INC | Mark Abraham Nubani | — | (562) 694 0063 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Cabinet Wholesalers INC | Eirik Coel Orman | — | (714) 693 1111 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Cabinetry | Hany Helmy Abdelnour Gad | — | (213) 431 9714 | Other | Lake Forest · Orange County | — | — |
| Cabinets & Interiors | Richard Eric Gyenese | — | (949) 472 9700 | Other | Irvine · Orange County | — | — |
| Cabinets By John | Cabinets By John | — | (714) 865 0260 | Other | Garden Grove · Orange County | — | — |
| Cabinets Etc | Cabinets Etc | — | (714) 964 1112 | Other | Huntington Beach · Orange County | — | — |
| Cabinets Installation Master | Salam Khamis Mahmoud | — | (714) 600 9221 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Cabinets Oc | Jeffrey Richard Ong | — | (714) 696 9907 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Cable - Com Solutions | Henry Allen Osbon | — | (714) 224 2545 | Electricians | Anaheim · Orange County | — | — |
| Cablelan | Evan Sean Muyskens | — | (714) 628 9655 | Electricians | Mission Viejo · Orange County | — | — |
| Cabral Electric INC | David Christopher Cabral | — | (949) 357 9619 | Electricians | San Clemente · Orange County | — | — |
| Cabral Tree Service | Cabral Camilo | — | (714) 748 1605 | Tree | Garden Grove · Orange County | — | — |
| Cabrera Pools And Spas INC | Elena Cabrera | — | (714) 724 0922 | Pool | Tustin · Orange County | — | — |
| Cabrera's Ornamental Iron | Cabrera's Ornamental Iron | — | (714) 356 8819 | Other | Cypress · Orange County | — | — |
| Cac Millwork | Carlos Antonio Contreras Mejia | — | (714) 296 1843 | Other | Westminster · Orange County | — | — |
| Cad+millworks Design | Peralta Jorge Jimeno | — | (714) 681 4914 | Other | Fullerton · Orange County | — | — |