| C B S Construction INC | Ken Gee | — | (415) 282 1888 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C B Woodfloors | C B Woodfloors | — | (415) 264 3216 | Other | San Francisco · San Francisco County | — | — |
| C C I Commercial Construction & Improvements INC | Richard Whitney Stevens | — | (415) 626 3338 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C Chu Construction Management | Chity Fong Chu | — | (415) 850 2930 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C H Burnham INC | Christopher Holmes Burnham | — | (415) 407 4036 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C H T Properties Development | C H T Properties Development | — | (415) 225 8086 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C I W And Sons Plumbing | Demetrius Marlow Williams | — | (415) 829 2230 | Other | San Francisco · San Francisco County | — | — |
| C J Construction | Wo Zhong Zhen | — | (415) 671 9060 | Electricians | San Francisco · San Francisco County | — | — |
| C K Construction Company | Chen Weidong | — | (415) 583 3385 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C K Interiors INC | Kenneth Lorenzo Carbin | — | (925) 497 4341 | Other | San Francisco · San Francisco County | — | — |
| C L & Y Construction INC | Jason Lai | — | (415) 218 2636 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C M Construction Company | Robert Chak Min Chiang | — | (415) 822 6088 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C Max Construction INC | Jiayi Wu | — | (415) 713 2515 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C N A Construction INC | Carlos Manuel Diaz | — | (415) 902 1887 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C P Painting | Chris Ky-van Phan | — | (415) 583 4672 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| C Plus E Construction INC | Zhenshu Huang | — | (415) 335 8891 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C R Reichel Engineering Co INC | Michael John Valadao | — | (415) 431 7100 | HVAC | San Francisco · San Francisco County | — | — |
| C R Tile | C R Tile | — | (650) 274 8453 | Other | San Francisco · San Francisco County | — | — |
| C S I Customer Service General Contracting INC | Burt James Hamrol | — | (415) 710 6043 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C T B Construction INC | Tony Ho Leung Chiang | — | (415) 760 1138 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C T M Construction | Ching Tinsum | — | (415) 819 6338 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| C&n Reinforcing INC | Juan Carlos Perez | impallari@gmail.com | (209) 399 2022 | Other | San Francisco · San Francisco County | — | — |
| C3pr INC | Crystal Jean Miks | — | (415) 948 7095 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cabo Building Repairs & Maintenance INC | Herrera Antonio Cana | — | (415) 350 1517 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cabrillo Plumbing Heating & Air | Cabrillo Plumbing Heating & Air | support@discovercabrillo.com | (650) 343-4700 | HVAC | San Francisco · San Francisco County | — | — |
| Cadence Construction | Steven Soo Kim | info@cadenceconstruction.com | (650) 575 5545 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahalane Electric INC | John Patrick Cahalane | — | (415) 334 2188 | Electricians | San Francisco · San Francisco County | — | — |
| Cahill - Nibbi Joint Venture | Contractors INC Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill - Nibbi Joint Ventures | Bros Associates INC Nibbi | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill - Tsm Joint Venture | S M T | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill Contractors INC | John Edward Jr| Cahill Jay Edward Jr Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill Contractors LLC | Kathryn Cahill Thompson | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill Guzman Construction Group Jv | Contractors LLC Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill Light Frame Joint Venture | Contractors LLC Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill-pilot Joint Venture | Contractors LLC Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cahill-singular Joint Venture | Contractors LLC Cahill | — | (415) 986 0600 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cai Construction | Zhi Yuan Cai | — | (415) 290 2813 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Caicon LLC | Benjamin Cai | info@caicon.com | (415) 810 2228 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cairn Construction Company INC | Seamus Martin Lyons | info@cairnconstruction.com | (415) 661 4367 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cak Renovations | Cak Renovations | — | (415) 810 1210 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |