| California Coast Plumbers INC | Jeffrey Alan Gores | — | (714) 632 0170 | Other | Anaheim · Orange County | — | — |
| California Coast Plumbing | California Coast Plumbing | — | (949) 298 0314 | Other | Anaheim · Orange County | — | — |
| California Coast Plumbing & Repiping INC | Garcia Hugo | — | (714) 251 4475 | Other | Anaheim · Orange County | — | — |
| California Commercial Diving LLC | Richard Jason Graham | — | (714) 294 4644 | Other | Santa Ana · Orange County | — | — |
| California Construction & Reglaze INC | Hernandez Gabriel | — | (714) 654 6697 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| California Construction LLC | Do Tat Doan | — | (310) 796 6296 | GC, remodel, ADU | Buena Park · Orange County | — | — |
| California Construction Svcs | Douglas Michael Byers | — | (714) 227 6357 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| California Contents INC | Johnny Aioanei | — | (714) 319 5286 | GC, remodel, ADU | Orange · Orange County | — | — |
| California Custom Cellars INC | Christopher L Swain | — | (858) 205 3004 | GC, remodel, ADU | Laguna Niguel · Orange County | — | — |
| California Custom Coatings | California Custom Coatings | — | (714) 815 0857 | Windows, patio, painters | Laguna Hills · Orange County | — | — |
| California Custom Creations INC | Eddie Jay Stokes | eddie@californiacustomcreations.com | (866) 797 0410 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| California Custom Lift INC | Laine Jay Knecht | — | (714) 554 1300 | Other | Garden Grove · Orange County | — | — |
| California Deck Coatings INC DBA Crank Waterproofing | Adam Eugene Jones | — | (949) 646 9356 | Other roofers | Costa Mesa · Orange County | — | — |
| California Design Wood Products INC | Kathleen Ann Nelson | — | (949) 476 0923 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| California Detection Systems INC | Susan Lynn Stevens | — | (714) 629 0015 | Electricians | Yorba Linda · Orange County | — | — |
| California Doors And Windows | Michael Steven Marohnic | calidoorsandwindows60@gmail.com | (888) 804 7775 | GC, remodel, ADU | Laguna Hills · Orange County | — | — |
| California Earth Transport INC | Robin Poss Hartnett | — | (714) 447 3478 | GC, remodel, ADU | Fullerton · Orange County | — | — |
| California Earthwork INC | Ruiz Armando Gutierrez | — | (714) 568 8247 | Other | Santa Ana · Orange County | — | — |
| California Elevator Concepts INC | Laine Jay Knecht | — | (714) 554 1300 | Other | Garden Grove · Orange County | — | — |
| California Enviromental Care | California Enviromental Care | — | (714) 279 8119 | Windows, patio, painters | Anaheim · Orange County | — | — |
| California Environmental Group INC | John Huntington Ii Spink | — | (949) 254 3479 | Windows, patio, painters | Costa Mesa · Orange County | — | — |
| California Equipment Rentals INC | Gregg Andrew Miller | — | (714) 935 0563 | Other | Orange · Orange County | — | — |
| California Fire Protection | California Fire Protection | — | (949) 770 5371 | Other | San Clemente · Orange County | — | — |
| California Fire Protection & Backflow INC | Andrew Marshall Weise | — | (949) 770 5371 | Other | San Clemente · Orange County | — | — |
| California Flooring & Construction | Mao Long Wang | — | (714) 276 2888 | GC, remodel, ADU | Brea · Orange County | — | — |
| California Flooring Service INC | Jason Thomas Ramsay | — | (949) 355 3501 | GC, remodel, ADU | Irvine · Orange County | — | — |
| California Gate And Entry Systems | Matthew William Melton | — | (714) 632 8882 | Electricians | Anaheim · Orange County | — | — |
| California Granite Countertops & Tile | Silvar-garcia Pablo | — | (714) 395 1080 | Other | Buena Park · Orange County | — | — |
| California Green Air Conditioning And Heating | Amgad Emil Attalla Wasef | — | (949) 462 4484 | HVAC | Laguna Hills · Orange County | — | — |
| California Green Breeze INC | Amgad Emil Attalla Wasef | californiagreenbreeze@gmail.com | (949) 397 2281 | HVAC | Laguna Hills · Orange County | — | — |
| California Gutter Company INC | Gary James Wild | — | (714) 206 4516 | Other | Huntington Beach · Orange County | — | — |
| California Heating And Air Conditioning | California Heating And Air Conditioning | — | (949) 351 4336 | HVAC | Dana Point · Orange County | — | — |
| California High Speed Partners | Track Services INC Railworks | — | (800) 464 9030 | Other | Brea · Orange County | — | — |
| California Home Builders & Restoration INC | Peter Humberto Marconi | — | (714) 591 5733 | GC, remodel, ADU | Santa Ana · Orange County | — | — |
| California Home Construction | Michael Neal Packer | — | (714) 747 0643 | GC, remodel, ADU | Huntington Beach · Orange County | — | — |
| California Home Improvement & Design INC | Mike Soheilian | — | (949) 680 9298 | Windows, patio, painters | Irvine · Orange County | — | — |
| California Imperial Roofing | Alcantar Alvarado Heriberto | — | (714) 858 9225 | Other roofers | Santa Ana · Orange County | — | — |
| California Income Property INC | Balogh Stephen | — | (949) 466 2011 | GC, remodel, ADU | Orange · Orange County | — | — |
| California Landcare | Michael Frederick Mc Cabe | — | (714) 850 1028 | Windows, patio, painters | Santa Ana · Orange County | — | — |
| California Locating Services INC | Jennifer Lynn Reardon | — | (714) 632 1596 | Other | Anaheim · Orange County | — | — |