| Cardoza And Son Construction INC | Jesse Joseph Cardoza | — | (949) 239 8206 | GC, remodel, ADU | San Juan Capistrano · Orange County | — | — |
| Care Free Landscape & Property Services | Irineo Alfonso Camacho | — | (714) 296 1427 | Windows, patio, painters | Orange · Orange County | — | — |
| Caribou Industries INC | Michael Frederick Harrah | — | (714) 543 9484 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Carl Manire Company LLC | Carl William Manire | — | (949) 633 2505 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Carl Markham Signs | Carl Markham Signs | — | (714) 271 1248 | Other | Huntington Beach · Orange County | — | — |
| Carl Raymond Company INC | Travis Wayne Winsor | — | (714) 771 7670 | Electricians | Orange · Orange County | — | — |
| Carl's Concrete Construction | Carlyle Jason Bryden | — | (949) 706 7033 | Other | Newport Beach · Orange County | — | — |
| Carlini Plumbing Company LLC | Vincent Domenico Fab Carlini | — | (949) 690 0754 | Other | San Juan Capistrano · Orange County | — | — |
| Carlisle Construction | James Carlisle Van Wagoner | — | (562) 900 7421 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Carlisle Energy Solutions INC DBA Carlisle Refrigeration | Prieto Jorge Vera | — | (714) 684 1766 | HVAC | Lake Forest · Orange County | — | — |
| Carlos - N - Sons Plastering | Carlos Alberto Gonzalez | — | (714) 929 8770 | Other | Costa Mesa · Orange County | — | — |
| Carlos Alberto Solorzano | Carlos Alberto Solorzano | — | (949) 292 8476 | GC, remodel, ADU | Orange · Orange County | — | — |
| Carlos Cruz | Carlos Cruz | — | (949) 622 5400 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Carlos Garage Door Repair LLC | Menaged Oz Harely Dean | — | (714) 559 3479 | Other | Huntington Beach · Orange County | — | — |
| Carlos Macias Electric | Carlos Adrian Macias | — | (949) 929 2117 | Electricians | Costa Mesa · Orange County | — | — |
| Carlos Mondragon | Carlos Mondragon | — | (714) 474 6824 | Other | Santa Ana · Orange County | — | — |
| Carlos Ochoa DBA New Deal Electrical Services | Carlos Edgard Ochoa | — | (560) 324 9624 | Electricians | Brea · Orange County | — | — |
| Carlos Ramirez | Carlos Ramirez | — | (714) 623 9489 | GC, remodel, ADU | Garden Grove · Orange County | — | — |
| Carlos Sanchez | Carlos Sanchez | — | (714) 767 1395 | Electricians | Santa Ana · Orange County | — | — |
| Carlos Varela Contracting INC | Carlos Daniel Varela | — | (949) 275 0188 | GC, remodel, ADU | Tustin · Orange County | — | — |
| Carlos Villa Mendoza | Carlos Villa Mendoza | — | (925) 752 1272 | Other | Fountain Valley · Orange County | — | — |
| Carlos X Galvan | Carlos X Galvan | — | (714) 397 3816 | Electricians | Yorba Linda · Orange County | — | — |
| Carlson Construction | Steven Otto Carlson | — | (714) 395 2201 | GC, remodel, ADU | Westminster · Orange County | — | — |
| Carlson Plumbing Pros INC | Brandon Lynn Carlson | — | (714) 839 8566 | Other | Fountain Valley · Orange County | — | — |
| Carmelo Pluma | Carmelo Pluma | — | (714) 666 6617 | GC, remodel, ADU | Placentia · Orange County | — | — |
| Carmody Construction Company | Raymond Brian Carmody | — | (714) 870 4640 | GC, remodel, ADU | La Habra · Orange County | — | — |
| Carol Electric Company INC | Samuel Benjamin Proctor | — | (562) 594 1174 | Electricians | Los Alamitos · Orange County | — | — |
| Carollo Engineers INC | Balakrishnan Narayanan | — | (714) 593 5100 | Other | Costa Mesa · Orange County | — | — |
| Caron Plumbing INC | Jarrod Alan Caron | — | (949) 205 0736 | Other | Mission Viejo · Orange County | — | — |
| Carpe Diem Construction INC | Lane Palmer Whiteside | — | (949) 423 9235 | GC, remodel, ADU | Costa Mesa · Orange County | — | — |
| Carpe Diem Specialties | Carpe Diem Specialties | — | (714) 322 6599 | Other | Huntington Beach · Orange County | — | — |
| Carpenter Contruction Group DBA Pacific Landcrafters | Patrick Thomas Carpenter | — | (949) 498 7542 | Windows, patio, painters | San Clemente · Orange County | — | — |
| Carpenter's Construction | Edward Andrew Iii Carpenter | — | (714) 875 4487 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Carpet Concepts | John Andrew Counts | — | (714) 892 3384 | Other | Garden Grove · Orange County | — | — |
| Carpet Corner | Carpet Corner | — | (310) 214 3737 | Other | Mission Viejo · Orange County | — | — |
| Carpet Crafts | Carpet Crafts | — | (714) 282 0174 | Other | Orange · Orange County | — | — |
| Carpet Depot | Hamid Reza Seyfi | — | (949) 722 9642 | Other | Costa Mesa · Orange County | — | — |
| Carpvets | Ortiz Antonio | — | (714) 580 1171 | Windows, patio, painters | Buena Park · Orange County | — | — |
| Carr Custom Construction | Stephen Gary Carr | — | (562) 716 1268 | GC, remodel, ADU | Los Alamitos · Orange County | — | — |
| Carr Plumbing Contractors INC | Larry Stephon Jr Carr | — | (714) 628 0412 | Other | Orange · Orange County | — | — |