| Commercial Specialty INC | Michael Ross Steinbaugh | — | (209) 547 9277 | Other | Lodi · San Joaquin County | — | — |
| Commercial Storefronts | Michael Scott Martinek | — | (209) 835 2400 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Commercial Storefronts INC | Stephen Charles Martinek | — | (209) 835 2400 | Windows, patio, painters | Tracy · San Joaquin County | — | — |
| Competitive Concrete | Competitive Concrete | — | (209) 951 5957 | Other | Stockton · San Joaquin County | — | — |
| Compliant Concepts | Compliant Concepts | — | (209) 430 3401 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Con - Tek Construction INC | Steve Bradley Holden | — | (209) 368 2700 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Con J Franke Electric INC | Diana Lynn Frain | — | (209) 462 0717 | Electricians | Stockton · San Joaquin County | — | — |
| Con-fab California LLC | Michael Hugh Hein | — | (209) 249 4700 | Other | Lathrop · San Joaquin County | — | — |
| Conco-west INC | John Alan Onken | — | (209) 239 2110 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Concrete 182 Corporation | Raul Lucatero Cardenas | — | (209) 242 4753 | Other | Stockton · San Joaquin County | — | — |
| Condor Earth Technologies INC | Ronald Lee Skaggs | — | (209) 234 0518 | Other | Stockton · San Joaquin County | — | — |
| Conlin Fence Company INC | Thomas John Conlin | — | (209) 810 5325 | Other | Linden · San Joaquin County | — | — |
| Connolly Construction & Development | James Thomas Connolly | — | (209) 409 2590 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |
| Constant Evolution Technologies | Constant Evolution Technologies | — | (209) 323 2640 | Other | Manteca · San Joaquin County | — | — |
| Construction 1 R F C INC | Ronnie Lee Fowzer | — | (209) 838 1211 | Other | Escalon · San Joaquin County | — | — |
| Construction America | Padilla Eduardo Jimenez | — | (650) 333 8131 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Constructora Amora INC | Armando Mora Mora | — | (650) 537 6268 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Continental Builders | Continental Builders | — | (925) 383 9907 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Continental Painting | Continental Painting | — | (209) 471 1037 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Contreras Cement | Contreras Cement | — | (408) 903 5947 | Other | Tracy · San Joaquin County | — | — |
| Contreras Floor Covering | Contreras Rodriguez Carlos | — | (510) 355 2531 | Other | Stockton · San Joaquin County | — | — |
| Contreras Landscaping | Contreras Landscaping | — | (209) 663 0121 | Windows, patio, painters | Lodi · San Joaquin County | — | — |
| Controlled Enclosures | Controlled Enclosures | — | (209) 390 1955 | Electricians | Stockton · San Joaquin County | — | — |
| Cooper Controls And Electrical Services | Kiel Stephen Penrod | — | (209) 339 4571 | Electricians | Stockton · San Joaquin County | — | — |
| Copira Painting INC | Vargas Christopher Rapalo | — | (209) 561 2881 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Copper And Oak Remodeling | Cody John Seibel | — | (209) 210 4356 | GC, remodel, ADU | Lodi · San Joaquin County | — | — |
| Cordero Tile & Stone | Cordero Tile & Stone | — | (209) 416 6337 | Other | Stockton · San Joaquin County | — | — |
| Cordova Construction | Arturo Filimom Cordova | cordovaconstruction@gmail.com | (209) 992 7754 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Core Dynamics Gpr INC | Armando Daniel Moreno | contact@sansoxygen.com | (209) 403 0538 | Other | Lodi · San Joaquin County | — | — |
| Cornejo Icr LLC | William Joshua Cornejo | — | (209) 774 8523 | GC, remodel, ADU | Stockton · San Joaquin County | — | — |
| Cornerstone Property Maintenance LLC | Jose Maria Jr Sandoval | — | (209) 423 9887 | GC, remodel, ADU | French Camp · San Joaquin County | — | — |
| Coronado General Construction | Jesus Antonio Coronado | — | (209) 481 5169 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Cortez Bros Concrete Construction INC | Jesus Ramirez-Cortez | — | (510) 861 6400 | Tree | Manteca · San Joaquin County | — | — |
| Cortez Custom Heating & Air | Cortez Custom Heating & Air | — | (209) 607 1503 | HVAC | Stockton · San Joaquin County | — | — |
| Cost - U -less Plumbing | Cost - U -less Plumbing | — | (209) 513 2594 | Other | Stockton · San Joaquin County | — | — |
| Count Condes Plumbing Co | Dennis Matthew Conde | — | (209) 765 6059 | Other | Lodi · San Joaquin County | — | — |
| Covenant Construction & Design INC | Charles Mott White | — | (209) 596 9066 | GC, remodel, ADU | Manteca · San Joaquin County | — | — |
| Cover's Landscaping INC | Lee Jacob Cover | lee@coverslandscaping.com | (209) 404 3475 | Windows, patio, painters | Stockton · San Joaquin County | — | — |
| Covington Construction | Benjamin Campbell Covington | — | (559) 473 9412 | GC, remodel, ADU | Tracy · San Joaquin County | — | — |
| Cowan Plumbing And Construction | Vincent George Jr Cowan | — | (209) 604 9846 | GC, remodel, ADU | Escalon · San Joaquin County | — | — |