| California Heating & Air | California Heating & Air | — | (209) 499 8738 | HVAC | Patterson · Stanislaus County | — | — |
| California Heirlooms INC | Raymond Nicholas Franco | — | (209) 765 5116 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| California Home Renew INC | Daniel Saldivar | accounts@californiahomerenew.com | (209) 421-6682 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| California Landscape Supply INC | Ryan Robert Thornberry | info@californialandscapesupply.com | (209) 538 8493 | Windows, patio, painters | Ceres · Stanislaus County | — | — |
| California Marble | California Marble | — | (650) 630 2207 | Other | Turlock · Stanislaus County | — | — |
| California Power Co | Jolvin Daniel Morales | — | (209) 735 8354 | Electricians | Keyes · Stanislaus County | — | — |
| California Power Electric Co | Jose Jr Lopez | — | (209) 247 0302 | Electricians | Crows Landing · Stanislaus County | — | — |
| California Steel Fabricators INC | Michael Richard Pyle | — | (209) 566 0629 | Other | Modesto · Stanislaus County | — | — |
| California Welding Process Solutions | Diego Rolando Sr Aguilar | — | (209) 505 8147 | Other | Turlock · Stanislaus County | — | — |
| Callco INC | Phillip Eugene Callaway | — | (209) 577 2371 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Calres Construction | Steven Brent Sepulveda | — | (209) 484 1107 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Calwater Drilling Company INC | Curtis Martin Hennings | hello@calwaterdrilling.com | (209) 667 7932 | Other | Turlock · Stanislaus County | — | — |
| Cam's Heating & Air LLC | Cameron Alexander Vargas | — | (209) 494 8592 | HVAC | Riverbank · Stanislaus County | — | — |
| Canche Flooring | Canche Flooring | — | (650) 889 8611 | Other | Modesto · Stanislaus County | — | — |
| Cannella Construction | Vincent Charles Cannella | — | (209) 566 4341 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Capital Plumbing Systems INC | Gerber Fernando Perez Morris | — | (209) 717 5559 | Other | Modesto · Stanislaus County | — | — |
| Capitol Door & Window | Brittany Carann Opper | — | (209) 522 3539 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Capote Landscape INC | Daniel Arnold Sr Capote | sebastian@aldusleaf.org | (408) 624 0461 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Cardenas & Sons Electric INC | Larios Noel Cardenas | — | (209) 534 2810 | Electricians | Modesto · Stanislaus County | — | — |
| Cardol Construction INC | Juan Antonio Cardenas Olivera | — | (209) 214 4908 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Care's Cabinetry And Millwork | Care's Cabinetry And Millwork | — | (209) 356 8937 | Other | Modesto · Stanislaus County | — | — |
| Carla Brown | Carla Brown | — | (209) 607 0919 | GC, remodel, ADU | Empire · Stanislaus County | — | — |
| Carlos Handyman Construction | Carlos Miguel Machuca Ugas | — | (408) 561 0601 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Carlos Ruiz Construction INC | Juan Carlos Ruiz | — | (209) 505 0675 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Carlson Renovation And Repairs | Carlson Renovation And Repairs | — | (209) 585 7726 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Carnes Construction | Kenneth Wayne Carnes | — | (209) 605 7988 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| Carr's Landscape & Maintenance INC | Stephen Clark Carr | — | (209) 403 8360 | Windows, patio, painters | Turlock · Stanislaus County | — | — |
| Carranza Tree Service | Linda Q Carranza Ramirez | — | (209) 496 6943 | Tree | Modesto · Stanislaus County | — | — |
| Carrera Carpets | Carrera Carpets | — | (209) 613 5815 | Other | Modesto · Stanislaus County | — | — |
| Carrera Construction | Hilario Lopez Jr Carrera | — | (209) 321 9318 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Carrillo Landscape | Carrillo Landscape | — | (209) 416 2901 | Windows, patio, painters | Riverbank · Stanislaus County | — | — |
| Casa De Mac Lath & Plastering | Avalos Lomeli Heriberto | — | (209) 568 9230 | Other | Modesto · Stanislaus County | — | — |
| Casales Custom Surround Sound And Video | John Anthony Casale | — | (209) 667 9133 | Other | Turlock · Stanislaus County | — | — |
| Case Electric | John Owen Case | — | (209) 523 8429 | Electricians | Modesto · Stanislaus County | — | — |
| Casework Design | Casework Design | — | (209) 581 2742 | Other | Oakdale · Stanislaus County | — | — |
| Cassle Garage Door Company | Michael Steven Cassle | — | (209) 526 3600 | Other | Modesto · Stanislaus County | — | — |
| Castillo Construction | Gustavo Verdusco Castillo | wweeiihhuuaanngg@gmail.com | (209) 614 6325 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Castle Construction INC | Manjit Singh Sandhu | — | (209) 535 0098 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Castle Pest Management | Castle Pest Management | — | (877) 492-1276 | Pest, tile roofs | Modesto · Stanislaus County | — | — |
| Castle Well Drilling INC | William Chester Houck | castlewelldrilling@yahoo.com | (209) 968 0104 | GC, remodel, ADU | Riverbank · Stanislaus County | — | — |