| C F M Precision General Engineering INC | Miguel Angel Zaragoza Valencia | — | (209) 607 5418 | Other | Patterson · Stanislaus County | — | — |
| C G Tile | C G Tile | estimating@cgtile.com | (209) 620 9219 | Other | Turlock · Stanislaus County | — | — |
| C Hernandez Construction | Hernandez Gomez Celso | — | (209) 241 3765 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| C J's Masonry | C J's Masonry | — | (209) 541 8421 | Other | Modesto · Stanislaus County | — | — |
| C L Construction | Clint Harold Lind | — | (209) 765 7623 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| C L S / Cervantes Landscape Services INC | Alejandro Perez Cervantes | — | (209) 277 9861 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| C P Landscape & Design | Chad Alan Pometta | — | (209) 895 6044 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| C Rivera Concrete | C Rivera Concrete | — | (209) 613 9308 | Other | Hughson · Stanislaus County | — | — |
| C S R Locating INC | Thomas Ryan Wood | — | (209) 605 4018 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| C Vieira Builders | C Vieira Builders | — | (209) 631 5410 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| C Y G Drywall INC | Farias Cesar Gonzalez | — | (408) 489 0005 | Other | Modesto · Stanislaus County | — | — |
| C&c Painting INC | Christopher David Majano | — | (925) 341 8120 | Windows, patio, painters | Patterson · Stanislaus County | — | — |
| C3 Builders INC | Blake Edward Rariden | — | (209) 204 5115 | GC, remodel, ADU | Oakdale · Stanislaus County | — | — |
| C3 Construction Group INC | Seth Mason Sr Cheek | — | (209) 569 6114 | GC, remodel, ADU | Ceres · Stanislaus County | — | — |
| Ca Welding & Fabrication Co INC | Brandon Lee Garcia | — | (209) 648 0951 | Other | La Grange · Stanislaus County | — | — |
| Caballero Welding Repair | Caballero Welding Repair | — | (209) 277 6420 | Other | Newman · Stanislaus County | — | — |
| Cabinet Install Solutions | Edgardo Marquez | — | (909) 343 0623 | Other | Patterson · Stanislaus County | — | — |
| Cada Construction | Delgadillo Aguirre Alberto | — | (669) 203 4667 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Cal - Ram Heating & Air Conditioning | Luis Eduardo Ramirez | — | (209) 652 0398 | HVAC | Modesto · Stanislaus County | — | — |
| Cal - Valley Electric | Austin Cole Russell | — | (209) 496 5111 | Electricians | Knights Ferry · Stanislaus County | — | — |
| Cal Air Solutions INC | Pardy Bounthavong | — | (209) 765 8187 | HVAC | Salida · Stanislaus County | — | — |
| Cal Coating Asphalt INC | Richard Neil Jr Keas | — | (209) 668 2703 | Other | Turlock · Stanislaus County | — | — |
| Cal Pacific Curb | Cal Pacific Curb | — | (209) 544 3820 | Other | Modesto · Stanislaus County | — | — |
| Cal Plumbing | Cal Plumbing | — | (209) 900 3468 | Other | Modesto · Stanislaus County | — | — |
| Cal Underground INC | Derek Kurt Nichols | admin@calunderground.com | (209) 566 5232 | Other | Waterford · Stanislaus County | — | — |
| Cal Welding | Cal Welding | luciano@latinotype.com | (209) 876 1941 | Other | Denair · Stanislaus County | — | — |
| Cal-coast Dairy Systems INC | Lonnie Lewis Baptista | — | (209) 634 9026 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Cal-coast Mfg INC | Dolores Frances Baptista | — | (209) 634 9026 | GC, remodel, ADU | Turlock · Stanislaus County | — | — |
| Cal-state Plumbing | Eric Ray Gillihan | — | (209) 847 2648 | Other | Oakdale · Stanislaus County | — | — |
| Cal-valley Electrical | Juan Antonio Sr Limon | — | (209) 844 9998 | Electricians | Modesto · Stanislaus County | — | — |
| Cal-west Epoxy | Cal-west Epoxy | calwestepoxy@gmail.com | (209) 535 0157 | Other | Turlock · Stanislaus County | — | — |
| Calbrush Painting LLC | Luis Alberto Vargas Miranda | — | (209) 643 8445 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| Caleb Smith Painting | Caleb Smith Painting | — | (209) 423 6745 | Windows, patio, painters | Denair · Stanislaus County | — | — |
| Calheta & Co Remodeling | Kristina Nicole Rosa | — | (209) 576 0750 | GC, remodel, ADU | Modesto · Stanislaus County | — | — |
| Cali Tile & Stone | Cali Tile & Stone | — | (209) 872 0950 | Other | Waterford · Stanislaus County | — | — |
| Caliber Sign Installation LLC | Jose Munoz Gutierrez | — | (209) 596 0661 | Other | Patterson · Stanislaus County | — | — |
| California Building Structures INC | Shannon Lee James | micah@micahrich.com | (209) 573 3040 | Other roofers | Modesto · Stanislaus County | — | — |
| California Climate Systems | Jason Paul Canen | — | (209) 535 8156 | HVAC | Westley · Stanislaus County | — | — |
| California Crews | California Crews | — | (209) 204 1998 | Windows, patio, painters | Modesto · Stanislaus County | — | — |
| California Green Hydroseed And Landscape | California Green Hydroseed And Landscape | — | (209) 613 2504 | Windows, patio, painters | Oakdale · Stanislaus County | — | — |