| Call Carlos Construction | Carlos Michael Gonzales | callcarlosconstruction@gmail.com | (619) 366 7531 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Call Glenn Again LLC | Glenn Gerald Millar | service@callglennagain.com | (619) 786 5662 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Call Me Plumbing & Drains | Call Me Plumbing & Drains | — | (619) 717 4603 | Other | El Cajon · San Diego County | — | — |
| Callahan Construction INC | William Patrick Callahan | — | (858) 842 2012 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Callahan General Contractors Inc. | Callahan General Contractors Inc. | — | (858) 454-0000 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Callahan Services Group INC | Joseph John Callahan | eddie.haro@electricare.com | (858) 373 7300 | Electricians | Valley Center · San Diego County | — | — |
| Callan Telecommunications | Callan Telecommunications | — | (760) 525 6430 | Other | Ramona · San Diego County | — | — |
| Callin Painting Company | Javier Giron Melo | — | (619) 549 0529 | Windows, patio, painters | Spring Valley · San Diego County | — | — |
| Callison Construction | Benjamin Jason Callison | — | (858) 449 8956 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calmana Building Group INC | Santiago Gabriel Boquiren | aqremodeling2@gmail.com | (858) 405 7218 | GC, remodel, ADU | Santee · San Diego County | — | — |
| Calmat Drywall | Aleksander Matichyn | — | (619) 650 9495 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Calpacific Electric & Cable INC | Michael Andrew Ii Goulet | jcayala@traycons.com | (619) 820 1248 | Electricians | Alpine · San Diego County | — | — |
| Calpan General Contractor INC | Tlahuizcalpante Barreras Wilson | — | (619) 203 8763 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Calprop Corporation | Clayton Smith Zaccaglini | — | (760) 450 6885 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Calray Electric INC | Robert Arthur Guillory | info@calrayelectric.com | (760) 815 2176 | Electricians | Solana Beach · San Diego County | — | — |
| Calreo Construction | Anthony Brian Lee | — | (760) 954 9535 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Calroc Drywall INC | Jorge Luis Jr Lopez | — | (619) 794 5548 | Other | San Diego · San Diego County | — | — |
| Cals Electric | Chase Arthur Louis Schlein | — | (619) 707 7007 | Electricians | San Diego · San Diego County | — | — |
| Calsbeck Construction | Earl James Calsbeck | guy@infinitydesignbuild.com | (760) 705 6751 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Calshah Construction INC | Armin Asadyari | armin@calshahconstruction.com | (858) 997 7989 | Other | San Diego · San Diego County | — | — |
| Calsouth Electric INC | Michael Anthony Espinoza | astigma@astigmatic.com | (619) 881 7394 | Electricians | Ramona · San Diego County | — | — |
| Calspec Restoration | Calspec Restoration | — | (619) 244 1608 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Caltech Co INC | Tolga Horoz | — | (858) 435 0500 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calvin H Showley | Calvin H Showley | — | (619) 518 0578 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Calvine Landscape | Calvine Landscape | — | (619) 322 0437 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Camacho General Contractors | Camacho Robert | — | (619) 843 4140 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Camacho's Professional Painting Services LLC | Fernando Jr Camacho | — | (619) 962 5105 | Windows, patio, painters | National City · San Diego County | — | — |
| Camarda Construction | Peter John Camarda | — | (619) 230 0056 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cambridge Management Group INC | Kendra Pauline Morris Bork | — | (619) 497 0771 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cambridge Properties | Cambridge Properties | — | (760) 753 6060 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Camelot Construction | Carl Edward Ii Snodgrass | — | (615) 713 6402 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Camelot Development Group Incorporated | Russell Gerrit Kaup | eddie.haro@electricare.com | (760) 272 0104 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Cameron Bucher General Construction | Cameron Scott Bucher | — | (760) 996 8547 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| Cammack's Construction INC | Cory Andrew Cammack | — | (949) 412 9445 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Camp Construction | Allen Leon Camp | — | (775) 450 0226 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Campbell Enterainment | Campbell Enterainment | — | (760) 594 7910 | Other | Ramona · San Diego County | — | — |
| Campbell Escondido Refrigeration INC | Kenneth Eugene Lake | — | (760) 745 4431 | HVAC | Escondido · San Diego County | — | — |
| Campbells Custom Flooring | Campbells Custom Flooring | campbellscustomflooring@gmail.com | (760) 978 1979 | Other | Oceanside · San Diego County | — | — |
| Campos Concrete Company | William Michael Campos | — | (619) 591 6712 | Other | San Diego · San Diego County | — | — |
| Campos Drywall INC | Pedro Jr Campos | — | (760) 215 7170 | Other | San Diego · San Diego County | — | — |