| Clover Plumbing | Clover Plumbing | — | (760) 224 3333 | Other | Vista · San Diego County | — | — |
| Clp Electrical Services INC | Patrick Wilson Mohney | — | (760) 703 5607 | Electricians | Carlsbad · San Diego County | — | — |
| Clr Construction Company | Christopher Lee Ruiz | — | (480) 201 8383 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Clr Paintworks INC | Genaro Alberto Rincon | — | (619) 781 6150 | Windows, patio, painters | Chula Vista · San Diego County | — | — |
| Cls Construction LLC | Chivas Lee Stanley | — | (619) 251 2028 | GC, remodel, ADU | Lemon Grove · San Diego County | — | — |
| Cls Security Electronics | Daniel Edward Dorgan | — | (858) 654 2788 | Electricians | San Diego · San Diego County | — | — |
| Cls2 Corp DBA Elite Restoration | Carolina Cazares-Lara | guy@infinitydesignbuild.com | (619) 862 0182 | GC, remodel, ADU | Imperial Beach · San Diego County | — | — |
| Cltvt | Christopher John Slowey | — | (760) 529 8300 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Clyde Kennedy | Clyde Kennedy | — | (619) 200 9442 | GC, remodel, ADU | Alpine · San Diego County | — | — |
| Cm Electric | Carrillo Mafara Cristo | reception@cmelectric.com | (760) 917 2027 | Electricians | Oceanside · San Diego County | — | — |
| Cm Flooring | Cm Flooring | — | (619) 215 4381 | Other | San Ysidro · San Diego County | — | — |
| Cm Precision Tree | Charles Truman Jr Morse | — | (619) 454 1980 | Tree | El Cajon · San Diego County | — | — |
| Cm Precision Tree And Landscape Maintenance INC | Cm Precision Tree And Landscape Maintenance INC | — | (619) 983-1030 | Tree | San Diego · San Diego County | — | — |
| Cm Sheet Metal | Cm Sheet Metal | — | (619) 886 1338 | Other | El Cajon · San Diego County | — | — |
| Cm Tile | Cm Tile | — | (619) 846 9032 | Other | Spring Valley · San Diego County | — | — |
| Cmb Drywall INC | Carlos Manuel Beltran | — | (619) 788 9964 | Other | San Diego · San Diego County | — | — |
| Cmc Authentic Flooring INC | Carlos Antonio Jr Jaimez | — | (619) 710 5799 | Other | National City · San Diego County | — | — |
| Cmci Carlos Montero Construction INC | Cabrera Carlos Montero | — | (760) 445 5243 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Cmd Urban Maintenance | Richard Vance Gustafson | — | (619) 231 1161 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cmh Restoration Group INC | Marcus Stanford Hackler | — | (833) 203 5123 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Cmm Contracting INC | Cody Michael Murphy | deb@cmmcontracting.com | (760) 705 6500 | GC, remodel, ADU | Oceanside · San Diego County | — | — |
| Cmp Construction | Jung Yeol Han | — | (619) 884 9038 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Cmr Pool Service And Repair | Christopher Mark Rozmus | — | (760) 532 9583 | Pool | Escondido · San Diego County | — | — |
| Cms-electric | Joel Calixto Mejia | — | (619) 588 5062 | Electricians | El Cajon · San Diego County | — | — |
| Cmt Engineering INC | Trai Minh Chau | — | (714) 679 9502 | Electricians | Chula Vista · San Diego County | — | — |
| Cmv Cab Custom Cabinets | Cmv Cab Custom Cabinets | — | (760) 727 3521 | Other | Vista · San Diego County | — | — |
| Cna Specialists | Cna Specialists | — | (800) 924 9921 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Cng Development | Cng Development | — | (442) 278 6168 | Electricians | Encinitas · San Diego County | — | — |
| Cns Construction INC | Christopher Arthur Saupstad | — | (760) 908 7543 | GC, remodel, ADU | Encinitas · San Diego County | — | — |
| Co's Traffic Control INC | Colleen Annette Bechtel | info@costraffic.com | (629) 239 8200 | Other | San Diego · San Diego County | — | — |
| Co-harvest Foundation | Avery Zoellin Cramer | — | (619) 857 1787 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Coach Construction INC | Leigh Guilford Briggs | info@indiantypefoundry.com | (619) 581 3181 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Coast & Country Plumbing INC | Israel Rodriguez | — | (760) 712 9911 | Other | Fallbrook · San Diego County | — | — |
| Coast 2 Coast Countertops INC | David Nanez Delgado | — | (760) 432 8098 | Other | Escondido · San Diego County | — | — |
| Coast 2 Coast Pools LLC | Cameron Joseph Watts | — | (619) 732 1030 | Pool | Chula Vista · San Diego County | — | — |
| Coast 2 Coast Refrigeration LLC | Raymond Bruton Jr Barnes | — | (919) 799 0276 | HVAC | Imperial Beach · San Diego County | — | — |
| Coast Building Specialties | Coast Building Specialties | — | (858) 277 6405 | Other | San Diego · San Diego County | — | — |
| Coast Construction & Maintenance | Stephen William Bogart | — | (760) 644 6759 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Coast Construction & Remodeling | Steven Karl Nessheim | — | (619) 251 6517 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Coast Construction Company | Neil Thomas Duhamel | connect@coastconstruction.ca | (858) 285 4488 | GC, remodel, ADU | San Diego · San Diego County | — | — |