| Cuyamaca Const INC | Lee Remington Cochrum | — | (619) 449 0750 | GC, remodel, ADU | Santee · San Diego County | — | — |
| Cv Electric | Carlos Alberto Vazquez Ramirez | — | (619) 721 9797 | Electricians | Chula Vista · San Diego County | — | — |
| Cvb Plumbing Heating & Air INC | Joseph Alan Nicholson | mn@tritonair.net | (866) 282 7422 | HVAC | San Diego · San Diego County | — | — |
| Cvg Sheet Metal | Cvg Sheet Metal | — | (619) 921 2967 | Other | Chula Vista · San Diego County | — | — |
| Cvs Construction Remodel | Samuel John Homant | — | (422) 822 8222 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Cvt Construction INC | Christopher Victor Tirrito | guy@infinitydesignbuild.com | (631) 707 4363 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Cw Build Company | Cody William Howell | — | (619) 887 2335 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Cw Concrete | Cw Concrete | — | (760) 533 6450 | Other | Escondido · San Diego County | — | — |
| Cw Construction | Charles Marfield Iv Walton | — | (760) 419 9253 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Cw Home Interiors & Construction | Hongying Michelle Gan | — | (858) 205 9788 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Cwb Rain Gutters LLC | Jean Rocha Nascimento | — | (346) 216 0240 | Other | Escondido · San Diego County | — | — |
| Cwp Plumbing | Cwp Plumbing | — | (760) 504 1603 | Other | Vista · San Diego County | — | — |
| Cy Richard Kackstetter | Cy Richard Kackstetter | — | (619) 208 2211 | Windows, patio, painters | Solana Beach · San Diego County | — | — |
| Cyber On Demand INC | Ashkan Hormozfar | ash@cyberondemand.com | (949) 280 1625 | Electricians | Fallbrook · San Diego County | — | — |
| Cyberdyne Construction LLC | Jonny Castaneda | — | (858) 335 7517 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cycle Electric INC | Mitchell Brad Holm | contact@claycoelectric.org | (619) 672 4975 | Electricians | El Cajon · San Diego County | — | — |
| Cypress Construction Co | Edward Louis Stoll | — | (916) 217 8445 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Cypress Development INC | Amy Marie Campagna | — | (619) 675 0024 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cypress Landscape LLC | Zaragoza Jaime | — | (760) 300 9941 | Windows, patio, painters | Escondido · San Diego County | — | — |
| Cypress View Builders INC | Larry Dean Albert Figueroa | — | (619) 795 8593 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cyra Design Build | Nanbakhsh Yavar | — | (619) 892 6159 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| D & D Floor Covering | D & D Floor Covering | — | (916) 821 3244 | Other | Carlsbad · San Diego County | — | — |
| D & G Quality Construction INC | Clyde Eugene Simpson | donaldg@dgqualityconstruction.com | (760) 972 6524 | GC, remodel, ADU | Borrego Springs · San Diego County | — | — |
| D & G Quality Engineering INC | Duane David Johnson | — | (760) 972 6524 | Other | Borrego Springs · San Diego County | — | — |
| D & I Remodeling And Restoration INC | Daniel A Tirado | — | (619) 253 3623 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| D & J Blalock Cabinets INC | Jake Willie Blalock | — | (858) 761 2888 | Other | Escondido · San Diego County | — | — |
| D & K Builders | D & K Builders | — | (760) 936 1169 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| D & L Builders INC | Oded Friedman | — | (858) 522 9603 | Electricians | San Diego · San Diego County | — | — |
| D & M Concrete Services INC | Olvis Mariscal | — | (619) 694 9973 | Other | Chula Vista · San Diego County | — | — |
| D & M Landscaping Design | Manuel Joseph Medina | — | (619) 504 5286 | Windows, patio, painters | Lemon Grove · San Diego County | — | — |
| D & N Electric INC | Joseph Kent Digenan | contact@claycoelectric.org | (858) 488 7551 | Electricians | San Diego · San Diego County | — | — |
| D & S Electric | Darryl Lane Reid | — | (951) 830 0408 | Electricians | Oceanside · San Diego County | — | — |
| D & S Fence Company | Kenny Ponce | — | (760) 448 0291 | Other | Oceanside · San Diego County | — | — |
| D & S Masonry | D & S Masonry | — | (619) 851 6116 | Other | Lemon Grove · San Diego County | — | — |
| D 3 Construction Services INC | Dwight Allen Thompson | guy@infinitydesignbuild.com | (760) 707 9663 | GC, remodel, ADU | Bonsall · San Diego County | — | — |
| D A Borman Drywall INC | David Anderson Borman | — | (858) 230 1240 | Other | Oceanside · San Diego County | — | — |
| D A C Enterprises LLC | Kyra Bush Sarem | — | (760) 822 8011 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| D A D Asphalt INC | Brian Keith Delhotal | — | (858) 748 8998 | Other | Poway · San Diego County | — | — |
| D A D Pavers | D A D Pavers | — | (619) 952 9011 | Other | El Cajon · San Diego County | — | — |
| D A Nelson Industries INC | Jonathan Dennis Nelson | — | (619) 249 7379 | Other | El Cajon · San Diego County | — | — |