| Cantara Design Group INC | Jason Mercier Voorhees | — | (949) 645 3684 | Electricians | Costa Mesa · Orange County | — | — |
| Canus LLC | Gregory Benton Ricks | — | (949) 855 8852 | Electricians | Laguna Niguel · Orange County | — | — |
| Canus Services INC | Floyd Oliver Jr Ricks | — | (949) 855 8852 | Electricians | Laguna Niguel · Orange County | — | — |
| Canyon Coast Electric LLC | Nathan Daniel Ng | — | (949) 683 0611 | Electricians | Orange · Orange County | — | — |
| Canyon Concrete Cutting INC | Bradley Brent Lehmacher | — | (714) 777 4988 | Other | Anaheim · Orange County | — | — |
| Canyon Crest Construction | Ernest Mundo Valdez | — | (949) 678 4271 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Canyon Crest Construction INC | Alfred Xsavier Chiurazzi | — | (949) 466 4678 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Canyon Fireplace Corporation | Robert Darrell Lewis | — | (714) 937 1081 | Other | Orange · Orange County | — | — |
| Canyon Hills Construction | Jesse Lopaka Kruger | info@ndiscovered.com | (714) 279 9144 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Canyon Hills Pools INC | Thomas Stephen Mata | — | (714) 336 1480 | Pool | Anaheim Hills · Orange County | — | — |
| Canyon Park Landscaping | Juarez Gerardo Cueto | — | (714) 381 8710 | Windows, patio, painters | Placentia · Orange County | — | — |
| Canyon Rim Construction | Christopher Allen Mc Henry | — | (949) 292 9013 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Canyon West Construction INC | Ivan Hoben | — | (949) 636 6225 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Cap Edge Environmental LLC DBA Cap Edge Restoration | Jaime Rafael Funes | — | (949) 504 4121 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Capacity Garage & Closet | Chad Gary Derouchey | — | (714) 306 3451 | GC, remodel, ADU | San Clemente · Orange County | — | — |
| Capistrano Ag LLC | Bethany Erin Ross | — | (949) 395 5080 | Windows, patio, painters | San Clemente · Orange County | — | — |
| Capistrano Air INC | Patrick Andrew Scott | — | (949) 481 9605 | HVAC | Laguna Hills · Orange County | — | — |
| Capistrano Beach Glass | Capistrano Beach Glass | — | (949) 493 0756 | Windows, patio, painters | Capistrano Beach · Orange County | — | — |
| Capistrano Builders INC | Virginia Eileen Hirchag | capistranobuilders1@gmail.com | (949) 842 7615 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| Capistrano Electric | Michael Val Deantonio | capistrano949@ymail.com | (949) 244 2185 | Electricians | San Juan Capistrano · Orange County | — | — |
| Capistrano Lock & Safe | Janell Irene Yamada | — | (949) 496 5625 | Other | San Juan Capistrano · Orange County | — | — |
| Capistrano Plumbers | Jonathan Quiroz | — | (949) 374 7186 | Other | San Juan Capistrano · Orange County | — | — |
| Capistrano Plumbing | Capistrano Plumbing | — | (949) 493 1521 | Other | San Juan Capistrano · Orange County | — | — |
| Capistrano Valley Glass & Mirror INC | Elaine Cohn Zax | — | (949) 493 4623 | Windows, patio, painters | San Juan Capistrano · Orange County | — | — |
| Capital Construction | Curtis Clayton Moore | — | (714) 337 8117 | GC, remodel, ADU | Westminster · Orange County | — | — |
| Capital Edge Construction | William Murphy V Cravens | — | (949) 504 4121 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Capo A General Contracting | Alexis Jo Maze | — | (949) 303 0115 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| Capo Beach Construction INC | Steven Paul Bogdanoff | — | (949) 433 5629 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| Capo Tile Caballero | Juan Jose Caballero Alamilla | — | (949) 326 4819 | Other | Orange · Orange County | — | — |
| Capri Cabinets | Capri Cabinets | — | (949) 813 9180 | Other | Irvine · Orange County | — | — |
| Capri Modern Homes | Capri Modern Homes | — | (949) 813 9180 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Capstone Building Group INC | Andrew Karl Meckert | — | (330) 541 1182 | GC, remodel, ADU | Corona Del Mar · Orange County | — | — |
| Capstone Construction Service INC | Benjamin Ryan Matyszuk | — | (657) 527 4503 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Capstone Designo/build | Ziyu Xiang | — | (949) 691 9886 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Capstone Development Co | Lee Dongjoo | — | (949) 413 0980 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Capstone Masonry | Capstone Masonry | — | (714) 204 1487 | Other | Yorba Linda · Orange County | — | — |
| Capsule Manufacturing INC | Kyle Gregory Gocal | — | (714) 369 5617 | Other | Anaheim · Orange County | — | — |
| Caputo Construction | Robert Anthony Caputo | info@caputoconstruction.com | (949) 355 5171 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Carasso Construction & Development | David Alan Finkelstein | — | (949) 337 9706 | GC, remodel, ADU | Laguna Beach · Orange County | — | — |
| Carbon Fiber Cabinets INC | Johnlery Saguiguit Cruz | — | (530) 228 9865 | Other | Mission Viejo · Orange County | — | — |