| Complete Plumbing & Backflow Service | Russell Glen Wilson | — | (760) 504 3056 | Other | San Marcos · San Diego County | — | — |
| Complete Property Improvements INC | Tina Lynn Cowle | willie@completepropertyimprovements.com | (760) 788 4376 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Complete Sheet Metal HVAC Solutions | Complete Sheet Metal HVAC Solutions | — | (888) 471-0675 | HVAC | San Diego · San Diego County | — | — |
| Completed Home Improvements Sd INC | Joshua David Jenkins | help@completed-sd.com | (619) 907 5296 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Compliance 1st Electric INC | Cortez Hernan | — | (619) 571 1213 | Electricians | Chula Vista · San Diego County | — | — |
| Comprehensive Glass Works | Mustafa S| Hassanali Mustafa Saifuddin Darugar | — | (619) 589 8858 | Windows, patio, painters | Santee · San Diego County | — | — |
| Conan Construction INC | Shannon Lee Maurer | — | (760) 512 1188 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Conant Company INC | Lee George Conant | — | (760) 814 0987 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Conaway And Sons Construction | Duane R Conaway | — | (760) 212 7602 | GC, remodel, ADU | Valley Center · San Diego County | — | — |
| Concept Construction And Remodeling INC | Joseph Edward Lawriw | — | (858) 232 5932 | GC, remodel, ADU | La Jolla · San Diego County | — | — |
| Concept Floor And Epoxy | Luis Felipe Jr Bautista | info@conceptfloorandepoxy.com | (619) 514-3107 | Other | San Diego · San Diego County | — | — |
| Concept To Creation Development INC | David Contreras Garibay | guy@infinitydesignbuild.com | (619) 454 0467 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Concepts In Concrete Construction INC | Richard Thomas Gardella | — | (858) 279 0354 | Other | San Diego · San Diego County | — | — |
| Concepts In Landscaping | Concepts In Landscaping | — | (760) 728 6341 | Windows, patio, painters | Fallbrook · San Diego County | — | — |
| Conchas Backflow Services | Frederick Julio Conchas | — | (619) 750 7351 | Other | Spring Valley · San Diego County | — | — |
| Concierge For Your Home Cfyh | Concierge For Your Home Cfyh | — | (619) 507 2988 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Concord Building And Design INC DBA Concord Construction | Manuel Iribe Esparza | gustavo@concordconstruction.com | (619) 384 0268 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Concrete Casters Corp | Martinez Armando Garcia | jmorello.mcc@gmail.com | (619) 630 3367 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Concrete Connection | Concrete Connection | — | (619) 512 6202 | Other | El Cajon · San Diego County | — | — |
| Concrete Contractors Interstate | Russel Wayne Baumgartner | — | (858) 679 5550 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Concrete Craft INC | Joseph John Garza | — | (760) 573 3221 | Other | Fallbrook · San Diego County | — | — |
| Concrete Creations INC | Scott David Johnson | sales@concretecreation.com | (760) 744 1002 | Windows, patio, painters | San Marcos · San Diego County | — | — |
| Concrete Design Concepts INC | John Sam Johnson | — | (619) 540 9496 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| Concrete Designs By Hightower | Concrete Designs By Hightower | — | (619) 261 3277 | Other | Pine Valley · San Diego County | — | — |
| Concrete King | Concrete King | cameron@foundation-enterprise.com | (619) 204 5421 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Concrete Transformations | Concrete Transformations | — | (760) 443 5657 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Concrete-tech INC DBA Miranda's Construction | Issac Miranda | — | (619) 245 1818 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Concrete4less Corp | Daniel Efren Flores | — | (619) 210 3773 | Other | San Ysidro · San Diego County | — | — |
| Conde's Pool And Spa Service And Repair | Conde Vazquez Reyes | — | (858) 245 9044 | Pool | Encinitas · San Diego County | — | — |
| Conejo's Trucking INC | Hernandez Cornelio Vazquez | — | (760) 658 4556 | Other | Escondido · San Diego County | — | — |
| Confident Construction Corporation | Greg William Middleton | — | (619) 923 4800 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Congero Carpentry | Congero Carpentry | — | (619) 777 0846 | Other | San Ysidro · San Diego County | — | — |
| Connect Plumbing & Drains INC | Francisco Manuel Garcia | — | (619) 861 8896 | Other | Ramona · San Diego County | — | — |
| Connectivity Masters INC | Bradley Paul Bridgman | — | (619) 851 2104 | Other | San Diego · San Diego County | — | — |
| Connectworks LLC | Omar Alejandro Puerta Sierra | support@connectworks.com | (858) 999 1575 | Other | San Diego · San Diego County | — | — |
| Connie Can Fix It | Connie Can Fix It | — | (619) 933 3719 | Other | Spring Valley · San Diego County | — | — |
| Connolly Enterprises INC | Bartholomew Joseph Iv Connolly | hello@rfuenzalida.com | (760) 716 3701 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Connor Energy Services | Miguel Angel Rodriguez | adam@aliveindustries.com | (858) 337 4022 | Electricians | San Diego · San Diego County | — | — |
| Conroy's Suspended Ceilings | Conroy's Suspended Ceilings | — | (619) 855 6190 | Other | Lakeside · San Diego County | — | — |
| Conserva Irrigation Of North County San Diego | Anthony Jay Gray | — | (760) 410 6182 | Windows, patio, painters | Escondido · San Diego County | — | — |