| Clarke Construction | Trevor Sawyer Clarke | — | (619) 535 5355 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Clarke Stairs INC | Joseph Patrick Clarke | joe@clarkestairs.com | (760) 445 3436 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Clarketon Restoration | Jordan Joshua Clarke | service@clarketon.com | (858) 625 0000 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Clarketon Restoration | Jordan Joshua Clarke | service@clarketon.com | (858) 625 0003 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Class A Builders LLC | Michael Anthony Gafa | — | (619) 519 0446 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Classic Builder INC | Ben Dean Morris | impallari@gmail.com | (619) 549 2874 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Classic Carpets INC | Joni Marie Cyr | info@classic-carpets.com | (760) 518 5727 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Classic Construction | Paul Brian Walker | — | (480) 242 5002 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Classic Electric INC | Martin Todd Honey | — | (619) 449 8580 | Electricians | Lakeside · San Diego County | — | — |
| Classic Hardwood Floors INC | Lisa Marie Wells | — | (858) 336-2431 | Other | San Diego · San Diego County | — | — |
| Classic Home Contractors INC | Stefan Randall Ricketts | buildzoomsupport@blockrenovation.com | (858) 905 1905 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Classic Landscape And Horticulture | Classic Landscape And Horticulture | — | (619) 390 3131 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Classic Painting INC | Luis Olivas | interested@domainmarket.com | (619) 397 4627 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| Classic Plumbing Heating & Air | Sixto Manuel Salcido | steved@precision-ac.com | (619) 607 8211 | HVAC | San Diego · San Diego County | — | — |
| Classical Kitchens | Classical Kitchens | — | (760) 533 5079 | Other | Escondido · San Diego County | — | — |
| Classy Closets | Catherine Rosemary Monaghan | appointments@classycompanies.com | (760) 735 2545 | Other | San Marcos · San Diego County | — | — |
| Claudiu Construction INC | Claudiu Mihai Giurea | — | (858) 336 2893 | GC, remodel, ADU | Poway · San Diego County | — | — |
| Clauss Construction | Benny Sandoval Garcia | info@claussconstruction.com | (619) 390 4940 | GC, remodel, ADU | Lakeside · San Diego County | — | — |
| Clayco Electric INC | Clayton Jamie Ray Mauldin | contact@claycosolar.com | (619) 971 2799 | Electricians | Alpine · San Diego County | — | — |
| Clayton Construction | Clayton Ashley Smith | — | (858) 353 9960 | GC, remodel, ADU | Del Mar · San Diego County | — | — |
| Clayton Courter | Clayton Courter | — | (858) 342 9550 | Electricians | Vista · San Diego County | — | — |
| Clayton Sandoval Landscaping | Clayton Sandoval Landscaping | — | (510) 517 5233 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Claytor Construction | Daniel Lee Claytor | — | (760) 415 6791 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Clb Construction | Chad Louis Bordonaro | — | (619) 415 3889 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Clean & Green | Clean & Green | cleangreensd@gmail.com | (619) 638 5834 | Electricians | San Diego · San Diego County | — | — |
| Clean & Green Tree Service INC | Angel Ordonez | — | (951) 595 0920 | Other | Fallbrook · San Diego County | — | — |
| Clean & Seal Pavers INC | Jake William Shorter | — | (619) 300 4900 | Other | Lakeside · San Diego County | — | — |
| Clean California Pressure Washing | Clean California Pressure Washing | larrysmith@cleancapressurewashing.com | (619) 334 7826 | Other | Lemon Grove · San Diego County | — | — |
| Clean Coast Plumbing And Leak Detection | Salvador Yoshi Watanabe | — | (619) 305 9945 | Other | Spring Valley · San Diego County | — | — |
| Clean Cut Construction | Jeffrey Ross Collins | — | (760) 497 6387 | GC, remodel, ADU | San Marcos · San Diego County | — | — |
| Clean Cut Drywall | Clean Cut Drywall | — | (619) 261 2726 | Other | San Diego · San Diego County | — | — |
| Clean Cut Landscape Design | Clean Cut Landscape Design | — | (619) 592 6474 | Windows, patio, painters | El Cajon · San Diego County | — | — |
| Clean Earth Restorations | Paul Alan Sukatski | info@cleanearthrestorations.com | (619) 284 4239 | GC, remodel, ADU | El Cajon · San Diego County | — | — |
| Clean Green Hauling | Clean Green Hauling | — | (858) 888 3302 | Other | San Diego · San Diego County | — | — |
| Clean Image INC | Andy Charles Flores | — | (619) 729 7426 | Other | Vista · San Diego County | — | — |
| Clean Line Painting | Clean Line Painting | — | (760) 468 1445 | Windows, patio, painters | Fallbrook · San Diego County | — | — |
| Cleanline Concrete | Scott Alan Brain | julie@cleanlineconcrete.com | (619) 435 4505 | Other | San Diego · San Diego County | — | — |
| Clear Blue Calibration Services | Dwayne Munson Love | — | (619) 985 8273 | Other | Poway · San Diego County | — | — |
| Clear Blue Energy Corp | Walter Simon | — | (888) 450 2232 | Electricians | San Diego · San Diego County | — | — |
| Clear Choice Contracting INC | David Alexander Sesti | interested@domainmarket.com | (760) 535 2202 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |