| Chris Construction | Christopher Anthony Carpiniello | — | (415) 897 7511 | GC, remodel, ADU | Novato · Marin County | — | — |
| Chris Hogg Painting | Chris Hogg Painting | — | (415) 342 8650 | Windows, patio, painters | San Anselmo · Marin County | — | — |
| Chris Solberg Construction | Christopher James Solberg | — | (415) 203 2318 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Christensen Construction | Brian Kiyoshi Christensen | — | (415) 385 6209 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Christian Nissen Landscaping INC | Christian Iversen Nissen | — | (415) 990 8410 | Windows, patio, painters | Novato · Marin County | — | — |
| Christopher Bock LLC DBA Geronimo Floors | Christopher Donovan Bock | — | (415) 246 6333 | Other | San Rafael · Marin County | — | — |
| Christopher Byron Cook Construction | Christopher Byron Cook | — | (415) 233 1521 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Christopher Clark Contracting INC | Christopher Blase Clark | — | (415) 328 3272 | GC, remodel, ADU | Novato · Marin County | — | — |
| Christopher Jay Phibbs | Christopher Jay Phibbs | — | (415) 244 1045 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Christopher Lacey | Christopher Lacey | — | (415) 847 9088 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Christopher Meyer West | Christopher Meyer West | — | (415) 827 8139 | Other | Novato · Marin County | — | — |
| Christopher Robert Ceinar | Christopher Robert Ceinar | — | (707) 327 9804 | Electricians | Novato · Marin County | — | — |
| Christopher Rose | Christopher Rose | — | (415) 533 5785 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Christopher Thiel Construction | Christopher Robert Thiel | — | (415) 326 7573 | GC, remodel, ADU | Novato · Marin County | — | — |
| Christopher Torney | Christopher Torney | — | (415) 730 1634 | Electricians | Kentfield · Marin County | — | — |
| Christopher's Construction INC | Christopher David Hesson | — | (415) 729 7069 | GC, remodel, ADU | Novato · Marin County | — | — |
| Chroma Colors INC | Michael Eric Clementi | — | (415) 453 2397 | Windows, patio, painters | Fairfax · Marin County | — | — |
| Chuck Voutselas Plumbing LLC | Charles Nicholas| Voutselas Chuck Voutselas | — | (415) 309 6603 | GC, remodel, ADU | Novato · Marin County | — | — |
| Churan Construction | Jeffrey Stephen Churan | — | (415) 525 9565 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Ciaran Lynch Carpentry LLC | Ciaran Gerard Lynch | — | (415) 860 1432 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Cifuentes Landscaping | Cifuentes Landscaping | — | (415) 235 6648 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Citroen Construction Co | Citroen Leslie | — | (415) 389 8216 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| City Builders | City Builders | — | (415) 306 6114 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| City Carpets | Hossein Bakhtiari | info@citycarpets.ca | (415) 454 4200 | Other | San Rafael · Marin County | — | — |
| City Front Plumbing INC | Jasper Carl Smith | — | (415) 454 6737 | Other | San Rafael · Marin County | — | — |
| City Sewer Pumping INC | Michael Joseph Giammona | — | (415) 663 1926 | Other | Point Reyes Station · Marin County | — | — |
| City Sitework | City Sitework | — | (415) 963 1736 | Windows, patio, painters | San Anselmo · Marin County | — | — |
| Ck Water Systems And Landscape Development INC | Alexander Colin Cartwright | — | (888) 326 9273 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Classic Oak Hardwood Floors | Classic Oak Hardwood Floors | — | (415) 307 5285 | Other | San Rafael · Marin County | — | — |
| Clean Living Construction Cleaning | James Lynn Prichard | — | (415) 485 1575 | Other | San Rafael · Marin County | — | — |
| Cleary Plastering INC | David Martin Cleary | — | (415) 724 0131 | Other | Novato · Marin County | — | — |
| Clements Tree Service INC | Steven Reed Clements | — | (415) 388 5094 | Tree | Mill Valley · Marin County | — | — |
| Cliffco LLC | Clifford Thomas Clark | — | (415) 328 8219 | GC, remodel, ADU | Novato · Marin County | — | — |
| Cline Builders LLC | Randall Stuart Cline | — | (415) 418 8973 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Clint Mc Bride Construction | Clinton Edward Mc Bride | — | (415) 716 5530 | GC, remodel, ADU | Ross · Marin County | — | — |
| Clm Builders INC | Michael Francis O'mahony | — | (415) 451 4841 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Closets Of Marin | Ofer Bouskila | — | (415) 990 2106 | Other | Novato · Marin County | — | — |
| Cmac Construction LLC | Ciaran John Mackey | — | (415) 680 6036 | GC, remodel, ADU | Novato · Marin County | — | — |
| Cnl Native Plant Nursery INC | Daniel Rafael Dufficy | — | (415) 720 6253 | Windows, patio, painters | Fairfax · Marin County | — | — |
| Coastal International INC | Bruce Edward Green | — | (415) 339 1700 | GC, remodel, ADU | Sausalito · Marin County | — | — |