| Construx 61 | Frank Linh Ho | hello@construx.com | (408) 892 5020 | GC, remodel, ADU | Saratoga · Santa Clara County | — | — |
| Contec INC | Florian Goetz Barth | — | (650) 444 4568 | GC, remodel, ADU | Los Gatos · Santa Clara County | — | — |
| Contractor Fire Protection | Jason Robert Blinkhorn | — | (480) 747 8792 | Other | Palo Alto · Santa Clara County | — | — |
| Contractors' Warehouse | Contractors' Warehouse | — | (408) 330-0934 | Windows, patio, painters | Santa Clara · Santa Clara County | — | — |
| Control Line Systems | Control Line Systems | — | (650) 471 4626 | Electricians | Sunnyvale · Santa Clara County | — | — |
| Controlled Air Systems Easy Cool | Joshua John George Kurmel | — | (408) 375 7018 | HVAC | Gilroy · Santa Clara County | — | — |
| Controlled Systems | Michael Thomas Leitchman | — | (408) 588 1763 | HVAC | Santa Clara · Santa Clara County | — | — |
| Controlled Systems Air Condition And Heating | Carmine Carl Squires | — | (408) 203 9100 | HVAC | Morgan Hill · Santa Clara County | — | — |
| Convectek Heating & Cooling | Karl Stephen Hornung | — | (408) 582 2878 | HVAC | Santa Clara · Santa Clara County | — | — |
| Convergent Construction INC | Mohammed Ibrahim Seli Alshebeb | info@convergentconstruction.com | (415) 530 8053 | Electricians | Milpitas · Santa Clara County | — | — |
| Cook Construction | Jacob Alexander Cook | — | (408) 963 3376 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Cool Aid A / C And Refrigeration | James Glenn Mc Kinny | — | (408) 855 9300 | HVAC | Santa Clara · Santa Clara County | — | — |
| Cool Guys Mechanical INC | Jason Corpuz Daoang | — | (408) 890 0987 | HVAC | San Jose · Santa Clara County | — | — |
| Cool Pool Service INC | John Howard Liebmann | — | (650) 949 2435 | Pool | Mountain View · Santa Clara County | — | — |
| Cooler Living Systems | Cooler Living Systems | — | (408) 401 6564 | HVAC | Santa Clara · Santa Clara County | — | — |
| Coolman HVAC Supply | Coolman HVAC Supply | — | (408) 320-2105 | HVAC | Santa Clara · Santa Clara County | — | — |
| Coolview Tint INC | Joel Clark | sales@coolviewtint.com | (408) 309 2237 | Other | San Jose · Santa Clara County | — | — |
| Copper Gutter Services | George Michael Sasko | — | (650) 867 9416 | Other | Campbell · Santa Clara County | — | — |
| Coral Pool And Spa | Jose Luis Mejia | — | (408) 294 7665 | Pool | Campbell · Santa Clara County | — | — |
| Corby Gould | Corby John Gould | — | (650) 967 7665 | Electricians | Mountain View · Santa Clara County | — | — |
| Corby Pool Service & Repair INC | Johnathan Fredrick Brown | — | (650) 967 7665 | Pool | Mountain View · Santa Clara County | — | — |
| Corby Pools INC | Corby John Gould | service@corbypools.com | (650) 967 7665 | Electricians | Mountain View · Santa Clara County | — | — |
| Cordel Construction | Cynthia Marie Johnson | cordel100@yahoo.com | (408) 221 8126 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Cordova Construction | Santillan Cordova Ruben | cordovaconstruction@gmail.com | (408) 567 9969 | Other roofers | San Jose · Santa Clara County | — | — |
| Core Build J V | General Contractor INC Core | — | (408) 293 9728 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Core Builders | David Edward Neale | — | (408) 293 9728 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Core Plumbing Solutions INC | Jacob Aaron Brewer | — | (408) 704 0419 | Other | San Jose · Santa Clara County | — | — |
| Core Power INC | Verdin Manuel Cortinas | — | (408) 593 1435 | Electricians | Campbell · Santa Clara County | — | — |
| Core Project Contracting LLC | Sergey Petrovich Ershov | — | (408) 771 6656 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Corey Excavating | Corey Excavating | — | (408) 656 5796 | Other | Los Gatos · Santa Clara County | — | — |
| Corinthian Contractors | Thomas Matthew Olsen | — | (408) 205 2595 | GC, remodel, ADU | Campbell · Santa Clara County | — | — |
| Corinthian Electric | Jerrimia Javier Garcia | operations@corinthianelectric.com | (408) 766 2807 | Electricians | Gilroy · Santa Clara County | — | — |
| Corinthian Electrical | Lopez Louis | — | (408) 439 5482 | Electricians | San Jose · Santa Clara County | — | — |
| Cornejo Electric | Angel Alfredo Cornejo Artiga | — | (408) 763 1468 | Electricians | Gilroy · Santa Clara County | — | — |
| Corner Stone Construction | Abajlo Michel Shahbazi | — | (408) 688 6141 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Cornerstone Builder INC | Wen Zhang | interested@domainmarket.com | (408) 429 5554 | GC, remodel, ADU | Sunnyvale · Santa Clara County | — | — |
| Cornerstone Earth Group INC | Ronnie Lloyd Helm | — | (408) 245 4600 | Other | Sunnyvale · Santa Clara County | — | — |
| Cornerstone Property Management | Cornerstone Property Management | — | (408) 377-3000 | Property managers | San Jose · Santa Clara County | — | — |
| Corona Espinoza General Contractor | Corona Espinoza General Contractor | — | (408) 466 0872 | GC, remodel, ADU | San Jose · Santa Clara County | — | — |
| Corona Tree Experts INC | Carlos Arnoldo Corona-Garcia | eben@eyebytes.com | (408) 849 1736 | Tree | San Jose · Santa Clara County | — | — |