| Cma Construction Management And Associates | Bangert Matthew | — | (719) 335 9753 | GC, remodel, ADU | Newport Beach · Orange County | — | — |
| Cmc General Construction INC | Christopher Lee Lacy | — | (714) 679 9683 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| Cmf INC | David George Duclett | — | (714) 637 2409 | Other | Orange · Orange County | — | — |
| Cmh Environmental Group INC | Carl Marcellus Hulick | — | (714) 581 8762 | Other | Yorba Linda · Orange County | — | — |
| Cmi Masonry And Concrete INC | Vasquez Alfonso | — | (714) 532 1652 | Other | Placentia · Orange County | — | — |
| Cmr Industrial Painting | Cmr Industrial Painting | — | (714) 457 7864 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Cms | Timothy Carl Hoskins | — | (714) 453 7034 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Cmt Sheet Metal | Wesley Lain Jr Hinze | — | (949) 916 3520 | Other | Laguna Hills · Orange County | — | — |
| Cmz Construction INC | Dominick Anthony Iii Giambona | — | (714) 780 2180 | GC, remodel, ADU | Lake Forest · Orange County | — | — |
| Cn Construction Corp | Marc Tewfik Habib | — | (714) 951 1000 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| Cnc Air INC | James Dean Pittser | — | (714) 873 5756 | HVAC | Yorba Linda · Orange County | — | — |
| Cnc Builders INC | Christopher Lee Hamblin | — | (310) 889 8286 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Cnc Contractors Corp | Candy Marie Henderson | — | (714) 596 5001 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Cnl Luxury Paint & Designs INC | Luis Alberto Chilin Orellana | — | (949) 514 3872 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| Cns Surfaces INC | Jonathan Wilker Segui | — | (714) 931 4152 | Other | Lake Forest · Orange County | — | — |
| Co Iconstruction | Cuong Tam Nguyen | — | (714) 360 7588 | Other | Midway City · Orange County | — | — |
| Coast 2 Coast Plumbing INC | Chavez Adrian | — | (714) 580 5986 | GC, remodel, ADU | Anaheim · Orange County | — | — |
| Coast Aire | Coast Aire | — | (949) 300 3493 | HVAC | Mission Viejo · Orange County | — | — |
| Coast And Country Construction LLC | John Craig Blackstock | — | (949) 761 0451 | GC, remodel, ADU | Mission Viejo · Orange County | — | — |
| Coast Arbor | Coast Arbor | — | (562) 682 8537 | Tree | La Habra · Orange County | — | — |
| Coast Building Company | Roy Alfred Terry | — | (949) 510 2281 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| Coast Cabinetry & Design | Coast Cabinetry & Design | — | (949) 322 3993 | Other | Laguna Beach · Orange County | — | — |
| Coast Concrete & Masonry INC | Collin Joel Vath | — | (949) 493 3957 | Other | San Juan Capistrano · Orange County | — | — |
| Coast Concrete Cutting | Coast Concrete Cutting | — | (949) 651 6377 | Other | Irvine · Orange County | — | — |
| Coast Construction Services INC | Lessantiz Fereidoun | — | (310) 927 6703 | Electricians | Irvine · Orange County | — | — |
| Coast Electric | Edward Francis Kitchen | — | (949) 887 5122 | Electricians | Laguna Beach · Orange County | — | — |
| Coast Electric | William Leroy Steele | — | (714) 458 5029 | Electricians | Newport Beach · Orange County | — | — |
| Coast Engineering Contractors INC | David Mohammed Berri | — | (714) 801 3918 | HVAC | Garden Grove · Orange County | — | — |
| Coast Factory Blinds INC | Aldo Jesus Villarreal Astorga | — | (562) 493 4228 | Other | Anaheim · Orange County | — | — |
| Coast Floors INC | Shawn Robert Kennedy | — | (714) 863 5479 | Other | Irvine · Orange County | — | — |
| Coast Gate Automation INC | Gregory Alan Stark | — | (714) 200 7000 | Other | Huntington Beach · Orange County | — | — |
| Coast Grading | Coast Grading | — | (714) 872 1379 | Windows, patio, painters | Fullerton · Orange County | — | — |
| Coast Hydrojet & Rooter | Jerry Harrison Herrington | — | (714) 241 1414 | HVAC | Fountain Valley · Orange County | — | — |
| Coast Iron & Steel Co | Ronald Gregory White | — | (714) 803 8181 | GC, remodel, ADU | Yorba Linda · Orange County | — | — |
| Coast Landscape | Darin Richard Bond | — | (714) 630 8211 | Windows, patio, painters | Anaheim · Orange County | — | — |
| Coast Line Shutters | Coast Line Shutters | — | (949) 573 7548 | Other | San Juan Capistrano · Orange County | — | — |
| Coast Maintenance INC | Bryant William Hull | info@truedoorpm.com | (714) 266-3717 | GC, remodel, ADU | Irvine · Orange County | — | — |
| Coast Media | Coast Media | — | (949) 510 7338 | Other | Laguna Beach · Orange County | — | — |
| Coast Overhead Door & Electric INC | Patrick James Smith | — | (714) 375 6488 | Electricians | Huntington Beach · Orange County | — | — |
| Coast Pacific Builders INC | Charles Jeffrey Dun | info@copacbuilders.com | (949) 701 4921 | GC, remodel, ADU | Irvine · Orange County | — | — |