| C&s Painting And Fine Finishes | Henry Diep | — | (858) 292 8836 | Windows, patio, painters | San Diego · San Diego County | — | — |
| C-deleon | Carlos Humberto De Leon Hernandez | — | (619) 750 1926 | Other | La Mesa · San Diego County | — | — |
| C-me Trim Company INC | Taylor Charles Miinch | — | (619) 561 3700 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C.d. General Contracting | Dennis Anthony Melilli | chadwick.cdgeneralcontracting@gmail.com | (858) 331 9611 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| C2 Building Group | Joshua Michael Chesnut | — | (858) 232 0213 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| C3 Sewer & Drains | Kenyon Jay Ii Castro | — | (619) 857 0632 | Other | Lakeside · San Diego County | — | — |
| C39 Roofing | Cruz Fidel | impallari@gmail.com | (760) 748-1455 | Other roofers | San Marcos · San Diego County | — | — |
| C4s Scrap Refrigerant & Demolition | Kyle Ray Neal | — | (760) 521 9066 | Other | Ramona · San Diego County | — | — |
| C87 Construction & Solar INC | Juan Carlos Tecomulapa-sonido | — | (760) 675 7234 | Other roofers | Escondido · San Diego County | — | — |
| Ca Equipment & Excavation | Chad Jonathan Leonard | — | (760) 653 8861 | Other | Fallbrook · San Diego County | — | — |
| Ca Shores Construction INC | Michael Joseph Marinelli | — | (619) 547 7438 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Ca Top Construction INC | Diaz Ismael Jacobo | — | (760) 443 0703 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Cabal Construction | Emmanuel Soria Ley | info@cabalconstruction.com | (760) 410 4077 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Caball Corporation | Jose E Caballero | — | (619) 957 2552 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Cabana Pool Service | Kyle Samuel Bowman | — | (619) 913 9335 | Pool | San Diego · San Diego County | — | — |
| Cabanas Landscape | Cabanas Landscape | sebacabanas@hotmail.com | (619) 788 1398 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Cabinet Designs INC | Oscar Martinez | — | (619) 942 0631 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| Cabinet Doors Only | Cabinet Doors Only | sales@cabinetdoorsonly.com | (619) 415 7729 | Other | El Cajon · San Diego County | — | — |
| Cabinet Refinish & Renew INC | Lopez Tomas Bernal | — | (619) 279 4021 | Other | Chula Vista · San Diego County | — | — |
| Cabinetry Designs INC | Marcos Jr Gastelum | — | (619) 575 1400 | Other | Chula Vista · San Diego County | — | — |
| Cabinetry Slideout Shelving Co | Gary Anthony Stimac | — | (858) 603 0987 | Other | Escondido · San Diego County | — | — |
| Cabinets & Millwork By Luna | Cabinets & Millwork By Luna | — | (760) 586 2216 | Other | Escondido · San Diego County | — | — |
| Cabinets Galore (orange County) INC | Lucas Christian Brandt | — | (858) 586 0555 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cable Pipe & Leak Detection INC | Debra Lynn Belus | accounting@cpldetection.com | (619) 873 1530 | Other | El Cajon · San Diego County | — | — |
| Cable Technologies | Cable Technologies | — | (619) 992 6221 | HVAC | Spring Valley · San Diego County | — | — |
| Cabral Metalfab & Fence INC | Frank Jr Cabral | — | (619) 843 2605 | Other | Santee · San Diego County | — | — |
| Cabrales Construction INC | Ruben Cabrales-Herrera | — | (619) 851 1064 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Cabreja Electrical Services | Cabreja Amarante Domingo | — | (442) 341 4908 | Electricians | Escondido · San Diego County | — | — |
| Cabrera Concrete INC | Cabrera Martin | — | (760) 803 0256 | Other | Vista · San Diego County | — | — |
| Cabrillo Electric INC | Lowell Anthony Sr Loomer | — | (619) 226 1770 | Electricians | San Diego · San Diego County | — | — |
| Cabron Construction | Cassandra Chuyita Velarde | info@cabronconstruction.com | (619) 847 4989 | GC, remodel, ADU | National City · San Diego County | — | — |
| Cabtek Elevator Services | Angel Eugine Galindo | — | (619) 972 6926 | Other | Chula Vista · San Diego County | — | — |
| Cacy Electric | Ryan Michael Cacy | teamcacy@cacyelectric.com | (619) 817 9200 | HVAC | El Cajon · San Diego County | — | — |
| Cadenas Concrete | Cadenas Concrete | — | (619) 726 7376 | Other | National City · San Diego County | — | — |
| Cader Construction | Cader Hector | hectorcader@yahoo.com | (619) 804 2774 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Cadillac Plumbing INC | Francisco Fuentes | — | (619) 429 9066 | Other | San Marcos · San Diego County | — | — |
| Cadillac Tile & Marble | Cadillac Tile & Marble | — | (619) 519 3246 | Other | San Diego · San Diego County | — | — |
| Caicedo Painting | Caicedo Painting | — | (619) 253 8449 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Cairo Construction Company | William Anthony Cairo | info@cairoconstruction.com | (858) 277 6480 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal - Cool Mechanical | Michael Dean Dirksen | mn@tritonair.net | (858) 774 2743 | HVAC | San Diego · San Diego County | — | — |