| City Rise Utility Traffic Control LLC | Mariano Rodrigues Pacheco | — | (510) 771 5899 | Other | Woodbridge · San Joaquin County | — | — |
| Clafton Enterprises INC | Adam Dale Clafton | — | (209) 200 5302 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Clark Pest Construction | Jack Lewis De Rieux | clarkcares@clarkpest.com | (209) 368 7152 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Clarke Construction | Joshua Nicholas Clarke | — | (925) 724 7987 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Classic Design Construction | Marc Edward Garcia | — | (209) 401 0900 | Electricians | Woodbridge · San Joaquin County | — | — |
| Classic Design Interiors | Tiffany Dawn Gomes | — | (209) 334 4060 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Classic Roof TileProtected | Classic Roof Tile | — | (760) 690-2657 | Tile roofers | Escondido · San Joaquin County | — | — |
| Classic Tile INC | Steven Charles Maraccini | sales@classictile.com | (209) 599 8669 | Other | Manteca · San Joaquin County | — | — |
| Claudex Roofing INC | Claudio Sr Esquivel-xate | — | (209) 598 5841 | Other roofers | Stockton · San Joaquin County | — | — |
| Clayton A Titus INC | Clayton Alan Titus | — | (209) 401 1074 | Electricians | Stockton · San Joaquin County | — | — |
| Clean Gutters INC | Sean Michael O'day | — | (209) 599 6555 | Other | Ripon · San Joaquin County | — | — |
| Clear Edge Glass & Door | Clear Edge Glass & Door | — | (209) 534 1852 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Clear View Av | Nicholas Paul Yaw | — | (209) 418 8552 | Other | Stockton · San Joaquin County | — | — |
| Clearview Softwash INC | Kelly Don King | — | (209) 334 1000 | Other | Lodi · San Joaquin County | — | — |
| Clearwire INC | Moctezume Luis Olegorio Franco | — | (408) 794 8220 | Electricians | Tracy · San Joaquin County | — | — |
| Clifton Weed Abatement | Clifton Weed Abatement | — | (209) 640 9591 | Other | Tracy · San Joaquin County | — | — |
| Climate Care INC | Gerardo Fernandez Camarena | — | (209) 647 2725 | HVAC | Manteca · San Joaquin County | — | — |
| Climate Fusion Mechanical | Carlos Ernesto Munoz | — | (707) 339 7064 | HVAC | Lodi · San Joaquin County | — | — |
| Climbing High Tree & Lawn Care | Matthew George Evangelho | — | (209) 670 5753 | Other | Escalon · San Joaquin County | — | — |
| Closets Guru | Closets Guru | — | (510) 828 9295 | Other | Manteca · San Joaquin County | — | — |
| Cm Floor Covering INC | Charles Samuel Munoz | — | (209) 469 9055 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Cmpro Painting | Cmpro Painting | — | (209) 229 6834 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Cn O'neill Electric INC | Charles Joseph Nunez | — | (209) 941 3949 | Electricians | Stockton · San Joaquin County | — | — |
| Coaches HVAC Extraordinair | Christopher Edward Curtis | — | (209) 230 0651 | HVAC | Stockton · San Joaquin County | — | — |
| Coastal Landscape Contracting | Keith James Kiefer | — | (209) 931 9466 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Coatney Home Comfort INC | Jesse Micheal Coatney | — | (809) 840 3330 | HVAC | Lodi · San Joaquin County | — | — |
| Cobos Painting INC | Jason Cobos | — | (209) 259 9659 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Cojo Landscape INC | Robert Matthew Julien | — | (209) 234 6548 | Windows, patio, painters | French Camp · San Joaquin County | — | — |
| Collins Electrical Company INC | Brian Charles Gini | — | (209) 466 3691 | Electricians | Stockton · San Joaquin County | — | — |
| Color Change Co | Todd Andrew Lynch | — | (925) 570 0046 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Colorblast Painting | Colorblast Painting | info@colorblastpainting.com | (510) 383 0779 | Windows, patio, painters | Lathrop · San Joaquin County | — | — |
| Colorful Creations INC | Daniel Cazares Vargas | — | (510) 759 5021 | Windows, patio, painters | Manteca · San Joaquin County | — | — |
| Colors Painting & Designs | Colors Painting & Designs | — | (209) 969 3014 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Comfort Builder | Comfort Builder | — | (510) 925 5573 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Commercial General Electric | Henry Danilo Lima Flores | — | (209) 398 9378 | Electricians | Tracy · San Joaquin County | — | — |
| Commercial Industrial Refrigeration Company | Kevin Andrew Bradstock | — | (916) 212 4048 | HVAC | Acampo · San Joaquin County | — | — |
| Commercial Kitchen Hood Installation | Kaleb Randall Fachner | — | (209) 365 3033 | HVAC | Lodi · San Joaquin County | — | — |
| Commercial Maintenance & Renovation | David Allen Jr Weaver | — | (209) 221 0818 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Commercial Residential Audio Visual Experts INC | Gene Alton Jr Hatch | — | (510) 872 8850 | Other | Lathrop · San Joaquin County | — | — |
| Commercial Specialities Contracting INC | Uvalles Andrew | — | (209) 679 1849 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |