| Cal - Crete Partnership | Ledesma Daniel Soria | — | (760) 535 9002 | Other | Escondido · San Diego County | — | — |
| Cal - Custom Construction | Guillermo Mario Gonzalez | — | (619) 807 8021 | GC, remodel, ADU | Bonita · San Diego County | — | — |
| Cal Bear Construction | Kyle Sanford Beria | — | (760) 752 7882 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Cal Classic Construction | Randy Thomas | — | (858) 602 7447 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Cal Coast Audio Video | Cal Coast Audio Video | — | (760) 452 0773 | Other | Carlsbad · San Diego County | — | — |
| Cal Coast Carpets INC | Omar Orozco Herrera | info@calcoastcarpets.com | (619) 666 6117 | Other | Chula Vista · San Diego County | — | — |
| Cal Coast Construction | Armando Tom Yaotani | — | (619) 962 7211 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal Coast Construction & Restoration INC | Omar Orozco Herrera | — | (619) 666 6117 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Cal Coast Pest Management | Cal Coast Pest Management | info@calcoastpestmanagement.com | (619) 623-0809 | Pest, tile roofs | National City · San Diego County | — | — |
| Cal Coast Shutters | Cal Coast Shutters | — | (619) 820 7425 | Other | El Cajon · San Diego County | — | — |
| Cal Coast Tile & Natural Stone | Resendiz Fidel | — | (760) 975 8771 | Other | Escondido · San Diego County | — | — |
| Cal Coastal Painting | Cal Coastal Painting | — | (858) 569 8876 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Cal Com Insulation INC | Brent Richard Rutledge | — | (760) 231 7490 | Other | Oceanside · San Diego County | — | — |
| Cal Design INC | Hamid Shawn Hadizadeh | — | (884) 408 0047 | Other | San Diego · San Diego County | — | — |
| Cal One Heating & Air | Cal One Heating & Air | mn@tritonair.net | (951) 435 3491 | HVAC | Valley Center · San Diego County | — | — |
| Cal Pac Development | Gracia Socorro Esparza | — | (619) 296 7406 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal Pacific Industries INC | Mark Anthony Cabaj | — | (619) 843 2800 | Electricians | San Diego · San Diego County | — | — |
| Cal Renovation INC | Daniel Sandoval | — | (510) 514 2566 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal Roof INC | Douglas John Barry | info@christianroofing.com | (619) 500 1119 | Other roofers | El Cajon · San Diego County | — | — |
| Cal Rooster Roofing | Luis Joel Ortega | — | (619) 823 8092 | Other roofers | San Diego · San Diego County | — | — |
| Cal Safe Electric | Roberto Carlos Solis | — | (619) 764 2877 | Electricians | Lemon Grove · San Diego County | — | — |
| Cal South Builder | Cal South Builder | — | (619) 678 4100 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal South Premier Landscaping | Cal South Premier Landscaping | — | (619) 698 7998 | Windows, patio, painters | La Mesa · San Diego County | — | — |
| Cal Star Plumbing | Cal Star Plumbing | — | (760) 703 1419 | Other | Escondido · San Diego County | — | — |
| Cal State Equipment & Construction Co | Grant Roger Langford | — | (209) 761 0304 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal Trends Landscaping INC | John Scott Labotz | — | (619) 651 5179 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| Cal West Electric INC | Matthew John Bernatz | — | (619) 320 6060 | Electricians | Alpine · San Diego County | — | — |
| Cal West General Engineering INC | Matthew Lawrence Passiglia | — | (619) 433 8183 | Other | Lakeside · San Diego County | — | — |
| Cal West Mechanical Systems INC | Kelly Clifford Dean | steved@precision-ac.com | (619) 249 4231 | HVAC | Ramona · San Diego County | — | — |
| Cal Western General Contracting | Robert Michael Vasil | — | (619) 517 5837 | Other | Carlsbad · San Diego County | — | — |
| Cal-prop Realty INC | Richard Neil Thornton | — | (858) 483 3534 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cal-state Contractors | William Anthony Gaglione | — | (408) 971 3500 | Other | Tecate · San Diego County | — | — |
| Calabozo Framing INC | Martinez Horacio Rodriguez | — | (760) 613 2964 | Other | Oceanside · San Diego County | — | — |
| Calafata Construction And Electric INC | Robin Lee Calafata | wes@calafata.com | (619) 279 3006 | Electricians | San Diego · San Diego County | — | — |
| Calavo Builders | Calavo Builders | — | (619) 540 2554 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calcs & Design | Calcs & Design | — | (619) 733 4133 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Calderon Builders INC | Martin Ulisses Calderon | — | (619) 546 7857 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calderon Services INC | Andres Jesus Jr Calderon | — | (619) 269 5940 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calderon's Landscaping & Garden | Calderon's Landscaping & Garden | — | (619) 578 1293 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Caldwell Glass INC | Doreen Elizabeth Caldwell | — | (619) 938 9600 | Windows, patio, painters | Lakeside · San Diego County | — | — |