| Costanza Construction INC | Todd Felix Costanza | todd@costanza-construction.com | (415) 810 5149 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cota Glass | Cota Glass | service@cotaglass.com | (415) 712 4294 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Counterpoint Builders | Counterpoint Builders | — | (415) 264 9843 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| County Roofing Co | Chun Kun Seo | — | (415) 310 5887 | Other roofers | San Francisco · San Francisco County | — | — |
| Coyle Construction | Kevin Hartnett Coyle | — | (415) 336 1257 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cpg Construction INC | Carlos Petalver Garcia | — | (415) 999 7700 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cr Painting | Cr Painting | — | (415) 494 1840 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Crana Windows & Doors DBA Kevin Mc Laughlin Custom Windows & Door | Kevin John Paul Mc Laughlin | — | (415) 671 2846 | Windows, patio, painters | San Francisco · San Francisco County | — | — |
| Cratus INC | Liam Francis Finnegan | — | (415) 939 2840 | Other | San Francisco · San Francisco County | — | — |
| Creative Assembly INC | John Patrick Sullivan | — | (415) 206 1578 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Creative Works Construction | Kevin Guan Hua Chen | — | (415) 866 4397 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cresleigh Homes Corporation | Joyce Marie Weible | — | (415) 982 7777 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Crest Construction INC | Yulong Li | — | (415) 658 1239 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Crestlake INC | O'toole Joseph | — | (415) 240 8760 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cronin Construction & Development INC | Cronin Joanne | — | (415) 305 4131 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cronin Painting | Cronin Painting | chris@croninpainting.com | (415) 665 6332 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Crown Construction San Francisco | Ross Benedict Mc Kenna | — | (415) 926 8667 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Crown Hardware & Lock | Joseph Albert Schoepp | — | (415) 221 9086 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Crystal Miks | Crystal Miks | — | (415) 948 7095 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Ct Construction | Ton Tien Lam | — | (415) 793 3615 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Ct Electric | Cameron Charles Trotter | — | (415) 716 9890 | Electricians | San Francisco · San Francisco County | — | — |
| Ct Plumbing & Fire Protection | Ct Plumbing & Fire Protection | — | (415) 203 7178 | Other | San Francisco · San Francisco County | — | — |
| Ctw Mechanical INC | Matthew Chun-tak Wang | — | (415) 760 8318 | HVAC | San Francisco · San Francisco County | — | — |
| Cuan Construction | James Henry Marron | — | (415) 533 7816 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cube Drywall INC | Jose Mario Torres Rivera | — | (415) 573 9805 | Other | San Francisco · San Francisco County | — | — |
| Cullen Excavation INC | James Michael Maloney | — | (415) 579 7100 | Other | San Francisco · San Francisco County | — | — |
| Curran And Associates General Contractors INC | Kevin Philip Curran | — | (415) 571 8535 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Current Construction | Daithi A O'breaslain | — | (415) 969 6915 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Custom Construction Enterprises | Bryan Patrick Keane | — | (415) 312 9827 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Custom Dreams Tile | Custom Dreams Tile | jg@customdreamstile.com | (415) 312 3921 | Other | San Francisco · San Francisco County | — | — |
| Custom Media Works INC | Farley Wong | info@custommediaworks.com | (415) 517 7473 | Electricians | San Francisco · San Francisco County | — | — |
| Custom Pools Maintenance / Repairs | Custom Pools Maintenance / Repairs | — | (408) 674 8412 | Pool | San Francisco · San Francisco County | — | — |
| Cutting Edge Drapery | Gavin Dodd Garzee | — | (415) 824 6000 | Other | San Francisco · San Francisco County | — | — |
| Cw Construction | Carter Douglas Widlund | — | (415) 385 8379 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cw Dillon Builders | Christopher David Dillon | — | (424) 263 4528 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cy General Construction INC | Bo Zhong Liang | — | (415) 990 9431 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cy Lo Builder | Cy Lo Builder | impallari@gmail.com | (415) 606 7936 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| Cyrus Crest LLC | Khaleghi Sina | — | (424) 386 8185 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| D & F Construction INC | Feng Wenhui | — | (415) 832 0011 | GC, remodel, ADU | San Francisco · San Francisco County | — | — |
| D & Feng Plumbing INC | Xinya Feng | — | (415) 359 8914 | Other | San Francisco · San Francisco County | — | — |