| C M S Interiors INC | Matthew Edward Schmidt | — | (858) 535 5500 | Other | San Diego · San Diego County | — | — |
| C M S Property Maintenance INC | Luis Ismael Sandoval | — | (619) 471 6415 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| C M Sloan Construction | Criston Mitchel Sloan | — | (619) 980 0176 | GC, remodel, ADU | Santee · San Diego County | — | — |
| C M T Alpine Electric INC | Teri Jo Parker | — | (619) 562 9580 | Electricians | Lakeside · San Diego County | — | — |
| C Nyhan Landscape | C Nyhan Landscape | — | (619) 709 6356 | Windows, patio, painters | La Jolla · San Diego County | — | — |
| C P General Plumbing | C P General Plumbing | — | (760) 855 5945 | Other | Encinitas · San Diego County | — | — |
| C P Interiors INC | Charlene Leighton | — | (714) 335 5064 | GC, remodel, ADU | Bonsall · San Diego County | — | — |
| C P O Earthworks | C P O Earthworks | — | (858) 692 0781 | Other | Lemon Grove · San Diego County | — | — |
| C P Richards Signs INC | Stachia Nicole Higgins | — | (619) 596 7446 | Other | El Cajon · San Diego County | — | — |
| C Parra Construction Services | Chad Alexander Parra | — | (619) 540 2000 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| C Q Floors LLC | Dennis Patrick Herald | info@cqfloors.com | (760) 736 0080 | Other | San Marcos · San Diego County | — | — |
| C R Construction | Charlie Lecon Rodriguez | — | (760) 755 3968 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| C R Construction | Cesar Renato Rodriguez | — | (619) 440 6582 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C R Floor Cover | C R Floor Cover | — | (619) 954 9742 | Other | San Diego · San Diego County | — | — |
| C R Flooring Company | Carlos Raul Perez Hernandez | — | (619) 748 0015 | Other | Chula Vista · San Diego County | — | — |
| C R G General Construction | Carlos Roberto Guadarrama | — | (858) 354 4265 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C R General Construction INC | Muniz Carlos Rodriguez | — | (619) 838 3684 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| C R M Group INC | Gregory Samuel Granton | — | (760) 519 3980 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| C R Mitchell Construction INC DBA C R M Construction Co | Cory Ray Mitchell | — | (619) 561 5307 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| C R P Investments INC | Andrew S Sanjar | — | (858) 736 4606 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| C R Plumbing | C R Plumbing | — | (310) 384 3266 | Other | Chula Vista · San Diego County | — | — |
| C R S Development Co | Carlos Romulo Sarno | — | (858) 450 5098 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C R Smith Construction | Christopher Ryan Smith | crsmithcontracting@gmail.com | (619) 894 6194 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| C S Construction | Christopher Robin Sorchy | guy@infinitydesignbuild.com | (619) 572 5657 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| C S D Painting | C S D Painting | — | (760) 525 1597 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| C S H Construction | Steven Douglas Huza | — | (619) 316 2090 | GC, remodel, ADU | Santee · San Diego County | — | — |
| C S R Plumbing INC | Huyen Ngoc Pham | — | (888) 243 5353 | Other | San Diego · San Diego County | — | — |
| C S Woodworks | C S Woodworks | — | (619) 889 4017 | Other | San Diego · San Diego County | — | — |
| C Schell Construction | Chipper James Schell | — | (760) 712 6691 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| C T Drywall | C T Drywall | info@ctdrywallservices.com | (619) 987 7403 | Other | Chula Vista · San Diego County | — | — |
| C T Luke Construction | Charles Thomas Jr Luke | — | (619) 756 5356 | GC, remodel, ADU | Santee · San Diego County | — | — |
| C T M Contracting INC | Carty Holly Tyrrell-Mc | — | (858) 756 2024 | GC, remodel, ADU | Rancho Santa Fe · San Diego County | — | — |
| C T M Tile | C T M Tile | — | (760) 271 3582 | Other | Encinitas · San Diego County | — | — |
| C T T Contemporary Furniture Incorporated | Clyde Templeton Iii Turner | — | (858) 587 9311 | Other | San Diego · San Diego County | — | — |
| C Thomson Construction INC | Craig Herbert Thomson | — | (760) 940 6106 | GC, remodel, ADU | Vista · San Diego County | — | — |
| C To C Construction | Robin Joseph Chipman | — | (760) 884 7429 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| C V Construction | Christopher Reed Vincent | office@cvconstruction.com | (760) 519 1568 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| C W Design Landscaping | Jonathan Scott Hawley | cw.designlandscaping@yahoo.com | (858) 205 8083 | Windows, patio, painters | Oceanside · San Diego County | — | — |
| C West Electric INC | Cory Adam West | — | (858) 232 2085 | Electricians | San Diego · San Diego County | — | — |
| C&l Construction | Stephen Charles Chromiak | — | (619) 954 3858 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |