| C Grassmeier Remodeling | C Grassmeier Remodeling | — | (714) 749 0381 | GC, remodel, ADU | Corona · Riverside County | — | — |
| C H Landscape | C H Landscape | — | (951) 830 0082 | Windows, patio, painters | Perris · Riverside County | — | — |
| C Hughes Construction | Clarence Barkley Hughes | — | (714) 875 6398 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| C J Custom Iron Works | C J Custom Iron Works | — | (760) 641 6016 | Other | Palm Springs · Riverside County | — | — |
| C J D Builders | C J D Builders | — | (951) 232 4298 | GC, remodel, ADU | Hemet · Riverside County | — | — |
| C J General Construction | Nam Soo Cho | — | (714) 733 3385 | GC, remodel, ADU | Jurupa Valley · Riverside County | — | — |
| C J P Insulation | Juan J Cortez | — | (951) 545 7071 | Other | Menifee · Riverside County | — | — |
| C J Van Bruggen | C J Van Bruggen | — | (909) 463 0695 | Other | Temecula · Riverside County | — | — |
| C J W General Contracting | Chad Andrew Walton | — | (951) 652 0903 | Other | Murrieta · Riverside County | — | — |
| C J' S Pool Service | Christopher James Beck | — | (909) 210 8620 | Pool | Riverside · Riverside County | — | — |
| C Jan Van Gaale | C Jan Van Gaale | — | (951) 764 9954 | Other | Winchester · Riverside County | — | — |
| C K Specialists INC | Jessica Alix Ridgway | — | (714) 269 5337 | Other | Norco · Riverside County | — | — |
| C L Construction | Cornelio Jr Lopez | — | (760) 423 2526 | GC, remodel, ADU | Indio · Riverside County | — | — |
| C L Construction Services INC | Franky Wayne Dollarhide | — | (951) 296 5070 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| C L General Construction INC DBA Carlos Lopez Insulation & Acoust | Lopez Carlos | — | (760) 899 0488 | Windows, patio, painters | Coachella · Riverside County | — | — |
| C L Robert Plumbing Heating & Air INC | Charles Robert Cerise | — | (951) 377 3002 | HVAC | Riverside · Riverside County | — | — |
| C L Van Vliet & Co INC | Christopher Lyman Van Vliet | — | (760) 774 1320 | GC, remodel, ADU | Palm Desert · Riverside County | — | — |
| C Logan Incorporated DBA Logan Construction | Chad Henry Logan | — | (951) 233 1542 | GC, remodel, ADU | Riverside · Riverside County | — | — |
| C M Constructors INC | Michael John Hughes | — | (951) 471 0631 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| C M Design & Construction INC | Le Gary | — | (951) 760 8138 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| C M G Interiors LLC | Christopher Michael Ginter | — | (951) 458 0011 | GC, remodel, ADU | Winchester · Riverside County | — | — |
| C M I Industries INC | Mario G Gama | — | (714) 319 7321 | Electricians | Riverside · Riverside County | — | — |
| C M Pro Painting And Coating | Celia Minerva Martinez | — | (760) 578 5608 | Windows, patio, painters | Thermal · Riverside County | — | — |
| C Marroquin Painting And Home Services DBA C Marroquin Panting | Cesar Nicolas Marroquin | — | (669) 287 1234 | Windows, patio, painters | Palm Desert · Riverside County | — | — |
| C N C Construction | Christopher Lee Garay | — | (951) 326 4603 | GC, remodel, ADU | Temecula · Riverside County | — | — |
| C N L General Engineering | C N L General Engineering | — | (951) 529 4735 | Other | Aguanga · Riverside County | — | — |
| C P I Plumbing INC | Matthew Lawrence Merrick | — | (951) 674 3286 | Other | Lake Elsinore · Riverside County | — | — |
| C R C Tile & Marble | Eduardo Manuel Espinoza | — | (760) 672 6805 | Other | Murrieta · Riverside County | — | — |
| C R Custom Wrought Iron Design | Christian Josef Peter Ritter | — | (949) 395 5986 | Other | Riverside · Riverside County | — | — |
| C R D General Construction | Douglas Harry Roberts | — | (951) 245 0777 | GC, remodel, ADU | Lake Elsinore · Riverside County | — | — |
| C R G Plumbing | C R G Plumbing | — | (951) 238 0804 | Other | Perris · Riverside County | — | — |
| C R L Electric INC | Christopher Romero Luna | — | (951) 681 5631 | Electricians | Riverside · Riverside County | — | — |
| C R Pacific Landscape | C R Pacific Landscape | — | (951) 764 3393 | Windows, patio, painters | Murrieta · Riverside County | — | — |
| C R Performance Doors INC | Rosales Quintero Christopher | — | (951) 902 9428 | Other | Nuevo · Riverside County | — | — |
| C R Plaster | C R Plaster | — | (951) 326 6170 | Other | Temecula · Riverside County | — | — |
| C R Quality Pool Services | Rivera Claudio | — | (951) 345 9276 | Other | Murrieta · Riverside County | — | — |
| C S Custom Painting INC | Cesar Octavio Sandoval | — | (424) 326 6789 | Windows, patio, painters | Menifee · Riverside County | — | — |
| C S Drywall | C S Drywall | — | (951) 288 1837 | Other | Temecula · Riverside County | — | — |
| C S P S INC | Matthew Shidan Feres | — | (951) 609 6633 | GC, remodel, ADU | Corona · Riverside County | — | — |
| C T C Electric | Colt Tyler Cooper | — | (760) 902 8846 | Electricians | La Quinta · Riverside County | — | — |