| Cms Concrete INC | Nancy Rubi Jimenez Romo | — | (209) 681 4665 | Other | Modesto · Stanislaus County | — | — |
| Cody Bowman General Contractor | Cody Bowman General Contractor | — | (209) 969 5751 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Coit Services | Andrew Niles Rodgers | — | (209) 545 2648 | HVAC | Modesto · Stanislaus County | — | — |
| Cole Concrete Sawing & Drilling | Arlen Scott Cole | — | (209) 874 8142 | Other | Waterford · Stanislaus County | — | — |
| Cole Industries LLC | Darrel James Cole | austin@coleindustries.com | (209) 985 3237 | Other | Modesto · Stanislaus County | — | — |
| Collopack Solutions | Raymond Steven Hernandez | — | (707) 258 3940 | Other | Modesto · Stanislaus County | — | — |
| Color's Construction INC | Mario Bocanegra | — | (408) 930 0599 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Comfort Air Systems INC | Marco Antonio Rosales - Armenta | — | (408) 691 7283 | HVAC | Modesto · Stanislaus County | — | — |
| Comfort Experts | Frank Louis Iii Konrath | — | (209) 571 9000 | HVAC | Oakdale · Stanislaus County | — | — |
| Comfort Zone Heating & Cooling Corp | Nemorio Marcos Vasquez | — | (209) 222 7167 | HVAC | Patterson · Stanislaus County | — | — |
| Commonwealth General Contractors Corporation | Ronald Joseph Johns | — | (209) 202 5141 | Other | Denair · Stanislaus County | — | — |
| Complete Automated Mechanical | Cesar Armando Macias Anguiano | — | (209) 410 3946 | Other | Turlock · Stanislaus County | — | — |
| Complete Landscaping And Gardening | Complete Landscaping And Gardening | — | (209) 281 7997 | Windows, patio, painters | Salida · Stanislaus County | — | — |
| Complete Plumbing And Drain Specialist INC | Hector Reyes Mata | — | (209) 585 5803 | Other | Patterson · Stanislaus County | — | — |
| Concrete By Marc | Concrete By Marc | — | (209) 661 3251 | Other | Ceres · Stanislaus County | — | — |
| Concrete Maintenance | Iii Antonio Carrillo | — | (209) 581 7120 | Other | Modesto · Stanislaus County | — | — |
| Concrete Masters | Concrete Masters | — | (209) 605 7670 | Other | Ceres · Stanislaus County | — | — |
| Concrete Pro | Concrete Pro | — | (209) 672 2948 | Other | Salida · Stanislaus County | — | — |
| Concrete Solutions | Concrete Solutions | — | (209) 606 9904 | Other | Modesto · Stanislaus County | — | — |
| Concrete Surface Creations | Concrete Surface Creations | — | (209) 470 3341 | Other | Salida · Stanislaus County | — | — |
| Conde's Electric | Paul Conde | — | (209) 648 6237 | Electricians | Turlock · Stanislaus County | — | — |
| Condition 411 Corporation | Johnny Joe Flores | — | (209) 484 4280 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Consolidated Specialties INC | Rock Anthony Piatt | — | (209) 883 4500 | GC, remodel, ADU | Hughson · Stanislaus County | — | — |
| Constructionize INC | Jose Antonio Barrita Escobedo | — | (209) 648 3130 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Continental Foam INC Which Will Do Business In Ca As Continental | Dalton Warren Jr Duval | — | (209) 595 5206 | Other roofers | Patterson · Stanislaus County | — | — |
| Continental Landscape INC | Joe Keith Hendrex | — | (209) 545 4455 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Continental Painting | Continental Painting | — | (209) 402 8884 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Control Systems Services | Wade Ronald Poff | — | (209) 985 2967 | Electricians | Oakdale · Stanislaus County | — | — |
| Cook Backhoe Service | Jason Roy Cook | — | (209) 604 0281 | Other | Waterford · Stanislaus County | — | — |
| Cooksey's Construction | Gary Lee Cooksey | — | (209) 743 8624 | GC, remodel, ADU | La Grange · Stanislaus County | — | — |
| Cool - Tech Heating & Air Conditioning | Jose M Baeza Balcazar | — | (209) 968 7170 | HVAC | Modesto · Stanislaus County | — | — |
| Cool Care Heating And Air Conditioning INC | Shadi Adel Haddad | — | (209) 502 1817 | HVAC | Modesto · Stanislaus County | — | — |
| Cool Guy Mechanical INC | Jeramie Scott Cervantez | — | (209) 483 5850 | HVAC | Salida · Stanislaus County | — | — |
| Cordeiro Custom Remodeling And Repair | Cordeiro Custom Remodeling And Repair | — | (209) 485 2491 | GC, remodel, ADU | Newman · Stanislaus County | — | — |
| Cordova Carpenter Builders INC | Luis Enrique Cordova Sanchez | — | (650) 766 4935 | Other | Modesto · Stanislaus County | — | — |
| Coretemp Services INC | Brian Allan Moore | — | (209) 404 3017 | HVAC | Oakdale · Stanislaus County | — | — |
| Corner Stone Hardscape | Corner Stone Hardscape | info@cornerstonehardscape.com | (209) 499 6447 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Cornerstone Buildworks LLC | Oswaldo Valle Garcia | — | (209) 241 9086 | GC, remodel, ADU | Salida · Stanislaus County | — | — |
| Cornerstone Construction | Christian Edwards | gwebb@cornerstone-construction.com | (832) 259-2520 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |
| Cornett Plumbing Services | Shane Michael Cornett | — | (209) 505 1853 | Other | Oakdale · Stanislaus County | — | — |