| Cold Zone Heating & Air Conditioning INC | Von Eric Johnson | — | (909) 224 8590 | HVAC | Highland · San Bernardino County | — | — |
| Coldbox Construction Services | Ricardo Jr Rodriguez | — | (858) 717 6001 | GC, remodel, ADU | Upland · San Bernardino County | — | — |
| Colgen Construction INC | Genaro Colin | — | (951) 536 5295 | GC, remodel, ADU | Victorville · San Bernardino County | — | — |
| College Glass INC | Joe Michael Russell | — | (909) 626 1535 | Windows, patio, painters | Montclair · San Bernardino County | — | — |
| Collier's Construction / Custom Woodwork | Howell Frank Collier | — | (760) 514 3074 | GC, remodel, ADU | Apple Valley · San Bernardino County | — | — |
| Collins Electric | Dion Durell Collins | — | (909) 915 4440 | Electricians | Fontana · San Bernardino County | — | — |
| Collins Heating & Air Conditioning | Collins Heating & Air Conditioning | — | (909) 783 1949 | HVAC | Grand Terrace · San Bernardino County | — | — |
| Collinsworth Construction INC | Joe Daniel Collinsworth | — | (909) 772 9487 | GC, remodel, ADU | Yucaipa · San Bernardino County | — | — |
| Colon Prestige Roofing | Colon Dominguez Gilberto | — | (909) 486 0137 | Other roofers | Crestline · San Bernardino County | — | — |
| Colonial Electric INC | James Gary Lindsley | — | (909) 393 3141 | Electricians | Chino · San Bernardino County | — | — |
| Color Blind Painting | Color Blind Painting | — | (760) 774 1345 | Windows, patio, painters | Yucca Valley · San Bernardino County | — | — |
| Color Masters | Color Masters | — | (909) 528 8455 | Windows, patio, painters | Running Springs · San Bernardino County | — | — |
| Colorado River Plumbing INC | Joseph Jeffrey Payson | — | (760) 326 2626 | Other | Needles · San Bernardino County | — | — |
| Colossus Energy | Colossus Energy | — | (909) 228 0278 | Electricians | Colton · San Bernardino County | — | — |
| Colucci Plumbing Company | Matthew John Colucci | — | (626) 488 0741 | Other | Rancho Cucamonga · San Bernardino County | — | — |
| Combs Company Plumbing INC | Harold D Combs | — | (951) 847 1112 | Other | Yucaipa · San Bernardino County | — | — |
| Comfort & Hays Electric INC | Comfort Christopher | — | (909) 373 3388 | Electricians | Upland · San Bernardino County | — | — |
| Comfort Climate | Comfort Climate | info@comfortclimate.com | (626) 624 2589 | HVAC | Chino · San Bernardino County | — | — |
| Comfort Heating & Cooling Company | Fernandez Benjamin | — | (310) 863 7695 | HVAC | Apple Valley · San Bernardino County | — | — |
| Comfort Mechanical Enterprises INC | Patrick Michael Hilt | — | (909) 946 7180 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Comfort Temp | Comfort Temp | service@comforttemp.com | (909) 625 7473 | HVAC | Rancho Cucamonga · San Bernardino County | — | — |
| Commercial Concrete Constructors INC | Loyd Eugene Jr Mc Ghee | — | (909) 930 1793 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |
| Commercial Door Metal Systems INC | David Ora Holmes | — | (909) 606 5881 | Other | Chino · San Bernardino County | — | — |
| Commercial Door Pros | Agustin Mendoza | — | (626) 488 2740 | Other | Fontana · San Bernardino County | — | — |
| Commercial Quality Painting Services INC | Jaime Villegas | — | (909) 688 6676 | Windows, patio, painters | Grand Terrace · San Bernardino County | — | — |
| Commercial Site Clean-up Services | Rose Isabel Hernandez | — | (760) 987 7574 | Other | Hesperia · San Bernardino County | — | — |
| Commodity Trucking Acquisition LLC | Lawrence James Burns | — | (909) 355 5531 | Other | Chino · San Bernardino County | — | — |
| Community Action Partnership Of San Bernardino County | Darryl La Teef Johnson | — | (909) 723 1525 | HVAC | San Bernardino · San Bernardino County | — | — |
| Community Electrical | Joseph Jay Rodriguez | communityelectrical101@gmail.com | (909) 246 4910 | Electricians | Rialto · San Bernardino County | — | — |
| Compass Interiors Drywall Services INC | Jose Antonio Sanchez-Figueroa | — | (562) 396 3298 | Other | Hesperia · San Bernardino County | — | — |
| Compass Property Management | Compass Property Management | support@compasspropertymgnt.com | (949) 229-3071 | Property managers | San Bernardino · San Bernardino County | — | — |
| Competition Roofing INC | Robert Anthony Iii Currie | — | (909) 599 6270 | Other roofers | Alta Loma · San Bernardino County | — | — |
| Competitive Asphalt Coatings INC | Ingerslev Lars | — | (951) 361 1212 | Other | Highland · San Bernardino County | — | — |
| Competitive Drywall | Competitive Drywall | — | (760) 792 3198 | Other | Lucerne Valley · San Bernardino County | — | — |
| Competitive Lawn Services | Dean Edward Parrish | — | (760) 559 7961 | Windows, patio, painters | Hesperia · San Bernardino County | — | — |
| Complete Construction Partnerships INC | Young Hwan Bae | — | (213) 500 6628 | GC, remodel, ADU | Chino · San Bernardino County | — | — |
| Complete Construction Services INC | Jihad Sean Haddad | interested@domainmarket.com | (888) 673 0075 | GC, remodel, ADU | Rancho Cucamonga · San Bernardino County | — | — |
| Complete Pool Services | Michael Gregory Ulibarri | — | (800) 834 1094 | Pool | Ontario · San Bernardino County | — | — |
| Compliance Electric INC | Casey Martin Peters | — | (951) 966 5090 | Electricians | Rancho Cucamonga · San Bernardino County | — | — |
| Comtract Communications INC | Alan Campbell Harvey | — | (858) 200 5150 | GC, remodel, ADU | Ontario · San Bernardino County | — | — |