| Crawford Incorporated | Marc Darin Crawford | — | (510) 881 7856 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Crawford Sheet Metal Co | Kenneth Edward Nielsen | — | (925) 484 3003 | Other | Pleasanton · Alameda County | — | — |
| Crawlspace Clean & Insulation Incorporated | Matthew Allen Chilcote | — | (925) 858 6484 | Other | Pleasanton · Alameda County | — | — |
| Crayton Plumbing | Crayton Plumbing | — | (510) 692 1505 | Other | Oakland · Alameda County | — | — |
| Creative Iron Arts INC | Francisco Javier Rangel | francisco@creativeironarts.com | (510) 910 2175 | Other | Oakland · Alameda County | — | — |
| Creative Masonry INC | George Ivan Biczkow | astigma@astigmatic.com | (925) 606 8466 | Other | Livermore · Alameda County | — | — |
| Creative Shower Door Corp | John Patrick Olmstead | — | (510) 623 9000 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Creative Tile Master INC | Antonio De Jesus Sepulveda | — | (510) 305 3163 | Other | Hayward · Alameda County | — | — |
| Crenshaw Electric | William Jeffrey Crenshaw | — | (617) 767 1170 | Electricians | Hayward · Alameda County | — | — |
| Crescent Engineering & Construction INC | Mohammad Saeed Khan | — | (925) 202 3964 | GC, remodel, ADU | Pleasanton · Alameda County | — | — |
| Crestwood Contractors INC | Ling Haiguan | — | (510) 364 6202 | GC, remodel, ADU | Fremont · Alameda County | — | — |
| Crevallo Construction INC | Lawrence Theodore Kraut | — | (925) 583 5304 | GC, remodel, ADU | Livermore · Alameda County | — | — |
| Crew Color Painting INC | Arevalo Andres Azpeitia | — | (510) 846 7751 | Windows, patio, painters | Oakland · Alameda County | — | — |
| Cricket Roofing Services | Francisco Javier Elizondo Guzman | cricketroof@gmail.com | (510) 240 8062 | Other roofers | Oakland · Alameda County | — | — |
| Crisanto's Quality Construction INC | Miguel Angel Caudillo | — | (408) 786 8883 | GC, remodel, ADU | Newark · Alameda County | — | — |
| Crivelari's Construction | Amaury Cesar Crivelari | — | (510) 812 4363 | GC, remodel, ADU | Albany · Alameda County | — | — |
| Cross Electric | Jerome Wildgen Cross | — | (510) 659 1779 | Electricians | Fremont · Alameda County | — | — |
| Crosscut Construction | Matthew Julian Dudek | — | (415) 724 6707 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Crosslink - Colin Cross | Crosslink - Colin Cross | — | (510) 340 0297 | GC, remodel, ADU | Alameda · Alameda County | — | — |
| Crossroads Restoration LLC | Daniel Gerard Sullivan | aaron@crossroads-restoration.com | (925) 486 7577 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Crow Canyon Electric | Jerry Eladio Reynoso | jerry_reynoso@crowcanyonelectric.com | (510) 650 9113 | Electricians | San Lorenzo · Alameda County | — | — |
| Crow Painting & Decorating Service | Stuart Michael Crow | — | (510) 498 8533 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Crown Builders INC | Carlos Delgado Flores | — | (510) 568 3122 | Electricians | Dublin · Alameda County | — | — |
| Crown Worldwide Moving And Storage LLC | Salvatore Peter Ferrante | — | (510) 895 8050 | Other | Union City · Alameda County | — | — |
| Crowned Plumbing Services INC | Hector Guadalupe Coronado | — | (510) 878 0641 | Other | Hayward · Alameda County | — | — |
| Crowning Touches | Crowning Touches | — | (925) 699 6408 | Other | Livermore · Alameda County | — | — |
| Cruz A+ Remodeling | Cruz A+ Remodeling | — | (510) 512 3488 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Crystal Construction Clean Up Services | Mauricio Diaz-Perez | — | (925) 223 7368 | Other | Livermore · Alameda County | — | — |
| Cs Construction | Cesar Efren Salas Ambriz | — | (510) 967 7348 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Csl Electric | Felix Alejandro D Loaiza Bran | — | (857) 251 0765 | Electricians | Hayward · Alameda County | — | — |
| Cth Construction | Hiep Cong Nguyen | — | (510) 812 2104 | GC, remodel, ADU | Hayward · Alameda County | — | — |
| Cto Electric & Automation | Jose Cruz Reynoso | — | (510) 364 0245 | Electricians | Union City · Alameda County | — | — |
| Cuates General Construction | Juan Jose Pulido Marquez | — | (510) 760 1553 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cube Builders INC | Bayo Emmanuel | — | (510) 736 0404 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cubero Craftmanship Construction | Blas Antonio Cubero | — | (808) 385 7744 | GC, remodel, ADU | San Leandro · Alameda County | — | — |
| Cummings Construction | Jefferson David Cummings | — | (619) 888 7411 | GC, remodel, ADU | Oakland · Alameda County | — | — |
| Cunha's Custom Painting INC | Daniel James Cunha | — | (510) 352 2245 | Windows, patio, painters | San Leandro · Alameda County | — | — |
| Cunningham Construction | Andrew Damian Cunningham | info@cunninghamconstruction.com | (510) 760 3845 | GC, remodel, ADU | Castro Valley · Alameda County | — | — |
| Curiel's Painting | Curiel's Painting | info@curielspainting.com | (209) 410 0771 | Windows, patio, painters | Fremont · Alameda County | — | — |
| Curt's Construction Company | Curtis C Miller | — | (510) 623 7582 | GC, remodel, ADU | Fremont · Alameda County | — | — |