| Central Painting Co | Mike N Choi | — | (714) 713 4230 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Centric Flooring INC | Ramirez Fabian | — | (714) 727 9477 | Other | Fountain Valley · Orange County | — | — |
| Centurion Painting INC | Gabriel Timothy Kepler | — | (714) 809 5592 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Century American Development Corporation | Roger Craig Hobbs | — | (714) 633 8100 | GC, remodel, ADU | Orange · Orange County | — | — |
| Century Ent INC | Peter Makres | — | (949) 489 9911 | Electricians | San Juan Capistrano · Orange County | — | — |
| Century Heritage Builders INC | Hugo Ernesto Lepe | — | (657) 363 8120 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Century Products | Century Products | — | (714) 632 7083 | Tree | Anaheim · Orange County | — | — |
| Century Roofing Company | Richard Charles Sternberg | — | (714) 968 3233 | Other roofers | Huntington Beach · Orange County | — | — |
| Cer Clean Room INC DBA American Cleanroom Systems | Charlie Valentine Castaneda | — | (949) 589 5656 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |
| Cero-ton Erector | Nelson Wili Regalado Joel | — | (714) 805 1538 | Other | Santa Ana · Orange County | — | — |
| Cert-a-roof INC | Leslie Paul Watrous | — | (714) 270 5599 | Other roofers | Orange · Orange County | — | — |
| Certapro Painters Of Orange County | Janet Lynne Gibson | — | (714) 349 6110 | GC, remodel, ADU | Orange · Orange County | — | — |
| Certapro Painters Of Orange County - Yorba Linda Ca | Certapro Painters Of Orange County - Yorba Linda Ca | sgibson@certapro.com | (714) 485-2883 | Windows, patio, painters | Orange · Orange County | — | — |
| Certified Clean Water Corporation | Roger Alan Westergard | — | (714) 715 3808 | Other | Santa Ana · Orange County | — | — |
| Certified Contractors Co | Soroush Eghterafi Najafabadi | — | (714) 865 0840 | Electricians | Anaheim · Orange County | — | — |
| Certified Electrical Systems INC | Christopher Leo Chick | — | (562) 390 9291 | Electricians | Cypress · Orange County | — | — |
| Certified Hardscape | Ornelas Israel Garcia | — | (714) 474 9211 | Windows, patio, painters | Orange · Orange County | — | — |
| Certified Restoration Services INC | Siavash Sam Gergerehchi | — | (562) 254 8223 | GC, remodel, ADU | Rancho Santa Margarita · Orange County | — | — |
| Certified Roofing Specialists | Vazquez Olivarez Jose | — | (714) 668 0757 | Other roofers | Garden Grove · Orange County | — | — |
| Certified Steel Fabricators INC | Felix Coronado Garcia | — | (562) 522 7632 | Other | Anaheim · Orange County | — | — |
| Cesar Belmontes | Cesar Belmontes | — | (714) 476 5400 | Other | Buena Park · Orange County | — | — |
| Cesar Construction Corp | Gomez Cesareo Resendiz | — | (714) 858 0276 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Cesar Mora | Cesar Mora | — | (714) 631 6754 | Other | Santa Ana · Orange County | — | — |
| Cg4 Construction LLC | Christopher Wayne Nelson Godbee | — | (714) 457 7182 | GC, remodel, ADU | Cypress · Orange County | — | — |
| Cge Construction INC | John Dat Nguyen | — | (714) 728 7266 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Cgs Plumbing INC | Christopher Garry Smith | — | (714) 412 9634 | Other | Huntington Beach · Orange County | — | — |
| Ch Home Energy LLC | Patrick Joseph Van Daele | solar@chhomeenergy.com | (949) 312 1004 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Ch-air Conditioning & Heating | Ch-air Conditioning & Heating | — | (714) 603 5679 | HVAC | Garden Grove · Orange County | — | — |
| Chad Idris Electric | Chad Alexander Idris | — | (949) 547 6617 | Electricians | San Juan Capistrano · Orange County | — | — |
| Chad Papa | Chad Papa | — | (949) 433 8844 | GC, remodel, ADU | Corona Del Mar · Orange County | — | — |
| Chad William Wolff Wolff Builder Design | Wolff Builder Design | — | (714) 865 7036 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Chadwick's Custom Wood Doors | Chadwick's Custom Wood Doors | — | (949) 632 0458 | Other | Rancho Santa Margarita · Orange County | — | — |
| Chaffin Air INC | James Anthony Chaffin | info@chaffinair.com | (714) 864 0056 | HVAC | Placentia · Orange County | — | — |
| Chaim Kohlenberg | Chaim Kohlenberg | — | (619) 455 5598 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Chaisson General Contractors INC | Marvin Albert Winegar | — | (949) 636 9914 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| Chamberlain Backhoe Service INC | Anthony Albert Long | — | (714) 579 8670 | Other | Placentia · Orange County | — | — |
| Chambers Group INC | Heather E Clayton | — | (949) 261 5414 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| Chambers Masonry | Chambers Masonry | — | (949) 212 4368 | Other | San Clemente · Orange County | — | — |
| Champion Aire Heating And Air Conditioning | Eduardo Suarnaba Jr Diocson | — | (714) 930 3727 | HVAC | Westminster · Orange County | — | — |
| Champion Garage Door Repair | Tal Cohen | — | (714) 274 7655 | Other | Westminster · Orange County | — | — |