| Calltanny INC | Tanfirio John Palmese | — | (949) 380 0235 | Other | Mission Viejo · Orange County | — | — |
| Caloft | Luis Guillermo Salcido | — | (714) 732 4786 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Calpacific Cpc Construction INC | Jong Han Im | — | (213) 798 2499 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| Calpak Landscape INC | Javaid Khalid | — | (626) 965 8445 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Calpro Plumbing And Drain Cleanning | Calpro Plumbing And Drain Cleanning | — | (714) 344 2503 | Other | Anaheim · Orange County | — | — |
| Calpromax Engineering INC | Maria Armogeda | — | (714) 215 4146 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Calsky Construction | Will Truongsinh Nguyen | — | (714) 548 0124 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Calsouth Pool & Spa Services | Jason James Bicknell | — | (949) 232 8755 | Pool | San Juan Capistrano · Orange County | — | — |
| Caltec Corp | Hamid Abghari | info@caltec.com | (714) 373 5071 | Electricians | Irvine · Orange County | — | — |
| Caltia Construction Group | Reza Mirbeik | — | (714) 262 9916 | Windows, patio, painters | Yorba Linda · Orange County | — | — |
| Calvert Plumbing & Drain | Calvert Plumbing & Drain | — | (714) 350 2553 | Other | Foothill Ranch · Orange County | — | — |
| Calvet Fence | Calvet Fence | — | (714) 340 5089 | Other | Brea · Orange County | — | — |
| Calvin James Installations | Calvin James Installations | — | (714) 376 8496 | Other | Garden Grove · Orange County | — | — |
| Calvin Pham | Calvin Pham | — | (714) 606 0832 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Calwest Construction | Samuel Lowell Nelson | — | (714) 903 8932 | Other roofers | Huntington Beach · Orange County | — | — |
| Camacho's Construction Corp | Guzman Daniel Camacho | — | (714) 400 8455 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Camali Corporation | Hadi Mohammad Fakouri | — | (949) 580 0250 | HVAC | Lake Forest · Orange County | — | — |
| Cambridge Landscaping | Cambridge Landscaping | — | (714) 345 1639 | Windows, patio, painters | Orange · Orange County | — | — |
| Camcoast INC | Chad Alan Mc Coy | — | (949) 235 5452 | GC, remodel, ADU | Trabuco Canyon · Orange County | — | — |
| Camera Access Technologies INC | Scott Allen Myers | — | (714) 307 8834 | Electricians | Mission Viejo · Orange County | — | — |
| Cameron Ghaznavi | Cameron Ghaznavi | — | (949) 856 0080 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Camille Hajjar DBA Homeco | Camille Hajjar DBA Homeco | — | (714) 229 0022 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Campbell Consulting | Campbell Consulting | — | (858) 245 1928 | GC, remodel, ADU | Dana Point · Orange County | — | — |
| Campo Landscaping | Campo Landscaping | — | (714) 591 5854 | Windows, patio, painters | Santa Ana · Orange County | — | — |
| Campos Construction | Campos Steven | — | (714) 866 1267 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Campos Sheet Metal | Campos Sheet Metal | — | (714) 270 7243 | Other | Santa Ana · Orange County | — | — |
| Camron Enterprises INC | John Eric Geyer | — | (949) 262 2912 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Camron M Carter Construction | Camron Michael Carter | — | (949) 375 0958 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Can Do Remodeling | Jason Schuyler Albany | j@candoremodeling.com | (714) 752-3407 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Can-Do Windows & Doors | Can-Do Windows & Doors | — | (714) 752-3407 | Windows, patio, painters | Santa Ana · Orange County | — | — |
| Candelmo Development INC | James Anthony Candelmo | — | (949) 370 8699 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Candlelight Systems | Robert David Cusey | — | (949) 481 4300 | Electricians | San Clemente · Orange County | — | — |
| Canelo Construction | John Thomas Lisabeth | — | (714) 493 5787 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| Canhchinh Nguyen INC DBA Ccn Construction | Canhchinh Phuoc Nguyen | — | (714) 350 8890 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Cannan Plumbing | Cannan Plumbing | — | (949) 510 1927 | Other | Westminster · Orange County | — | — |
| Cannon Building Services INC | Timothy John Cannon | — | (714) 630 9570 | HVAC | Placentia · Orange County | — | — |
| Cannonball Pool Service INC | Scott Anthony Toth | — | (714) 478 3708 | Pool | Huntington Beach · Orange County | — | — |
| Cano Construction & Roofing | Jose Manuel Cano-gomez | — | (714) 472 1128 | Other roofers | Santa Ana · Orange County | — | — |
| Cano Painting | Cano Painting | — | (949) 478 9677 | Windows, patio, painters | Dana Point · Orange County | — | — |
| Canopy Custom Homes INC | Mckenna Megonigal Duley | — | (949) 933 1670 | GC, remodel, ADU | Newport Beach · Orange County | — | — |