| Cal Spectrum LLC | Charles Duarte Zavala | — | (714) 870 4233 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Cal Spectrum Painting | Cal Spectrum Painting | — | (714) 870 4233 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Cal State Pools | Cal State Pools | — | (714) 587 1916 | Pool | Costa Mesa · Orange County | — | — |
| Cal Sun Construction Co | Chang Jerry-wei | — | (714) 315 3366 | GC, remodel, ADU | Fountain Valley · Orange County | — | — |
| Cal Tech Engineering & Construction | Adel Issa Batarseh | — | (951) 312 4555 | GC, remodel, ADU | Brea · Orange County | — | — |
| Cal West Construction Group INC | Jubran Naim Sarkis | — | (714) 705 9425 | GC, remodel, ADU | Orange · Orange County | — | — |
| Cal-coast Coatings | Cal-coast Coatings | — | (714) 657 0207 | Other | Huntington Beach · Orange County | — | — |
| Cal-louis | Vincent Henry Flores | — | (714) 609 6791 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Cal-mar Professional Painting Corp | Jorge Martinez Calderas | — | (714) 342 6983 | Windows, patio, painters | Anaheim · Orange County | — | — |
| Cal-pac Engineering & Construction Co | Tim Jonathan Pae | — | (213) 249 1088 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Cal-pointe Builders | Jeffrey Ludwig Peterson | — | (714) 231 4677 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Cal-temp Air Conditioning & Heating Company | Claudio John La Rosa | — | (949) 582 3740 | HVAC | Rancho Santa Margarita · Orange County | — | — |
| Calabrese Electric Co | Ronald Lee Calabrese | — | (714) 381 9640 | Electricians | Fullerton · Orange County | — | — |
| Calafia Electric INC | Jeremee Thomas Berube | — | (949) 482 9647 | Electricians | San Clemente · Orange County | — | — |
| Calamerica Construction INC | Dilesh Ashok Patel | — | (949) 525 1651 | GC, remodel, ADU | Laguna Beach · Orange County | — | — |
| Calbear Construction INC | Armando Merino-Diaz | — | (714) 462 6378 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Calbuild Construction INC | Chacko Chennakattu Jacob | — | (213) 268 3321 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Calco Construction INC | John Yongtak| Yi Yong Tak Yi | info@calco-construction.com | (714) 292 1399 | GC, remodel, ADU | Cypress · Orange County | — | — |
| Calco Construction Services INC | Michael Le Roy Hotvedt | — | (714) 520 5600 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Calcoast Steel INC | Mehdi Haidarali | — | (714) 751 7714 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Calcoms | Michael Mohammadreza Ghaeli | — | (714) 726 5655 | HVAC | Brea · Orange County | — | — |
| Calcro Construction Corp | Teskac Josip | — | (310) 977 7644 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Calderon Built INC | Robert Michael Hoxsie | — | (714) 930 3703 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| Calderon Construction | Garrick Andy Calderon | — | (714) 675 4852 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Calderon Drywall Contractors INC | Juan Jose Calderon Ramirez | — | (714) 900 1863 | Other | Orange · Orange County | — | — |
| Calderon Tile & Stone Corporation | Raul Calderon | — | (714) 791 4193 | Other | Santa Ana · Orange County | — | — |
| Caldwell Builders | Matthew David Caldwell | — | (949) 500 4886 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Caldwell Construction Company | Phillip Lee Caldwell | sean@caldwellconstruction.com | (805) 845-7555 | GC, remodel, ADU | Laguna Beach · Orange County | — | — |
| Cale Company Flooring | Casey Lee Ploeger | — | (562) 841 1479 | Other | Seal Beach · Orange County | — | — |
| Caleb Construction INC | Nancy Song Lee | — | (562) 572 3896 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| Caleb Holden | Caleb Holden | — | (714) 493 0003 | Other | Santa Ana · Orange County | — | — |
| Caleb's General Contracting INC | Davey Martinez | — | (714) 752 0822 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Calgroup Construction & Design | Tran Kevin | — | (714) 378 8887 | GC, remodel, ADU | Fountain Valley · Orange County | — | — |
| Cali Artificial Turf Installation | Jose Luis Garcia Cabrera | — | (949) 973 3785 | Other | Aliso Viejo · Orange County | — | — |
| Cali Automation Corp | Levan Natsvlishvili | — | (855) 300 2030 | Other | Santa Ana · Orange County | — | — |
| Cali Clear Drains LLC | Derek Anthony Hovivian | — | (949) 308 8010 | Other | Mission Viejo · Orange County | — | — |
| Cali Coast Shutters & Shades LLC | Richard James Gloudeman | — | (714) 713 9512 | Other | Anaheim · Orange County | — | — |
| Cali Construction Group LLC | Jeremiah Bonetti | — | (714) 391 2417 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Cali Drywall INC | Castellanos Ramirez Jaime | — | (714) 392 5936 | Other | Newport Beach · Orange County | — | — |
| Cali Pavers INC | Piedra Francisco Molina | — | (714) 300 4790 | Windows, patio, painters | Anaheim · Orange County | — | — |