| C & S D Construction INC | Steven James Doctor | aqremodeling2@gmail.com | (619) 220 4161 | HVAC | San Diego · San Diego County | — | — |
| C & S Tile & Stone | Carlos Manuel Suazo | will@cstileandstone.com | (619) 977 0320 | Other | Spring Valley · San Diego County | — | — |
| C & W Construction | Kelly Vaughn Buckley | — | (619) 247 1350 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| C & W Diving Services INC | Elliott Winston West | — | (619) 474 2700 | Other | San Diego · San Diego County | — | — |
| C / I Electric & Son's | Indegno Ciro | — | (760) 497 6056 | Electricians | Oceanside · San Diego County | — | — |
| C 3 Integration Corp | Donovan Patrick Jones | — | (760) 814 0456 | Electricians | Vista · San Diego County | — | — |
| C A Construction | Carlos Osuna Amarillas | — | (619) 370 0917 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| C A Electric INC | Brandon Taylor Chilton | — | (707) 342 9108 | Electricians | Santee · San Diego County | — | — |
| C A Landscape Tree Service INC | Gonzalez-silva Jaime | — | (760) 672 2496 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| C And H Contracting | Chris Michael Telliard | — | (619) 788 0272 | Other | El Cajon · San Diego County | — | — |
| C And R Pavers | C And R Pavers | — | (760) 500 0809 | Other | Escondido · San Diego County | — | — |
| C And S Remodeling | C And S Remodeling | — | (619) 339 5722 | GC, remodel, ADU | Poway · San Diego County | — | — |
| C Arreola Concrete INC | Jose Felix Arreola | — | (619) 823 9733 | Other | San Diego · San Diego County | — | — |
| C Avilez Lath & Plaster INC DBA Ca Lath And Plaster | Jose Avilez | — | (760) 529 5472 | Other | Oceanside · San Diego County | — | — |
| C B Construction | Christopher Michael Balko | — | (619) 971 9055 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C B Construction | Steven Lee Coles | — | (760) 789 9832 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| C B Construction | Carlos Mauricio Brambila | — | (619) 246 6713 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C B D S D INC | Scott Jeffrey Peters | — | (760) 594 4460 | Other | Escondido · San Diego County | — | — |
| C B G Building Company LLC | Michael Arthur Holk | — | (858) 320 3900 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C B Rothey Electrical Systems | Christopher B Rothey | — | (760) 445 7363 | Electricians | Escondido · San Diego County | — | — |
| C B Tile | Brandon Michael Smith | — | (619) 322 7391 | Other | San Diego · San Diego County | — | — |
| C C & R Construction | Karen Rene Covington | — | (858) 397 2270 | Other roofers | San Diego · San Diego County | — | — |
| C C Construction | Cheryl Ann Cardinal | — | (760) 533 2889 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| C C Equipment Rental INC | Allan Christopher Lam | — | (760) 746 6040 | Other | San Marcos · San Diego County | — | — |
| C C H P | C C H P | — | (925) 922 4844 | Other | San Marcos · San Diego County | — | — |
| C C I Connect INC | Timothy Alan Nicholas | — | (619) 840 1642 | Other | San Diego · San Diego County | — | — |
| C C L Contracting INC | Blake Robert Lusky | — | (760) 743 2254 | Other | Escondido · San Diego County | — | — |
| C C L Glass | C C L Glass | — | (818) 426 8605 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| C C Nelson Plumbing | C C Nelson Plumbing | — | (760) 525 8627 | Other | Vista · San Diego County | — | — |
| C C S Proclean | Ruben Jr Ruvalcaba | — | (619) 646 0501 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C Casey Landscape Construction INC | Chris Raymond Casey | — | (760) 560 8766 | Windows, patio, painters | San Marcos · San Diego County | — | — |
| C Custom Woodworks INC | Campos Abraham | ccustomwoodworks1@gmail.com | (619) 739 2238 | Other | San Diego · San Diego County | — | — |
| C D E Electric INC | Elmer William Kennii Cooper | eddie.haro@electricare.com | (760) 739 0211 | Electricians | Escondido · San Diego County | — | — |
| C D Goodwin Construction | Clyde Douglas Iii Goodwin | — | (858) 254 0272 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C D I S | Roger C Price | — | (619) 813 7510 | GC, remodel, ADU | Vista · San Diego County | — | — |
| C D K Construction | Clifford Donald Jr Kelly | — | (619) 322 2540 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C D Nelson Construction | Charles David Nelson | — | (760) 822 3759 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| C D O Glass | Guillermo Enrique Villegas Escobedo | — | (619) 519 6164 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| C D Pavers & Concrete Corporation | Cristian Britany Duarte Galindo | — | (619) 646 1043 | Other | Escondido · San Diego County | — | — |
| C E A General Building | C E A General Building | — | (619) 864 2337 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |