| Creekside Custom Builders | Creekside Custom Builders | — | (415) 209 4111 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Cristoff Painting And Decorating | Krzysztof Malarecki | — | (510) 508 7224 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Crosswind Properties | Crosswind Properties | — | (415) 899 9908 | Other | Novato · Marin County | — | — |
| Crown Color Services | Anthony Laurence Micallef | — | (415) 640 2727 | Windows, patio, painters | Mill Valley · Marin County | — | — |
| Crown Ridge Roofing INC | Julian Corona | crownridgeroofing@pacbell.net | (415) 485 1500 | Other roofers | San Rafael · Marin County | — | — |
| Crystal Clear Pool Maintenance INC | Rogel Banner Garcia De Leon | — | (415) 258 8188 | Pool | Novato · Marin County | — | — |
| Cs Construction Co LLC | Chet Ryan Sullivan | — | (415) 235 7918 | GC, remodel, ADU | Corte Madera · Marin County | — | — |
| Cullen Construction | Daniel Patrick Cullen | — | (415) 492 8680 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Current Ev | Current Ev | deagle@currentev.com | (310) 477-2233 | EV chargers | Mill Valley · Marin County | — | — |
| Curtis Myers | Curtis Myers | — | (415) 407 8438 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Custom Builders Of Marin DBA Custom Tile Works | Anthony Michiel Bumgarner | — | (415) 722 3122 | GC, remodel, ADU | Novato · Marin County | — | — |
| Custom Painting | Custom Painting | info@custompainting.com | (415) 328 5313 | Windows, patio, painters | Fairfax · Marin County | — | — |
| Customized Hauling | Customized Hauling | — | (415) 847 5760 | Other | Novato · Marin County | — | — |
| Cutting Edge Construction | Edward Thomas Jones | — | (415) 892 3212 | Electricians | Novato · Marin County | — | — |
| Cycles Electric | Edward Clay Hassinger | — | (415) 298 0599 | Electricians | Mill Valley · Marin County | — | — |
| Cypress Homes INC | Moe Nobari | — | (415) 383 1848 | GC, remodel, ADU | Tiburon · Marin County | — | — |
| D & D Pipelines INC | Denis Finbarr O'keeffe | — | (415) 482 6510 | Other | San Rafael · Marin County | — | — |
| D Benjamin Cahn DBA Zion Engineering | Zion Engineering | — | (415) 531 3151 | Other | Mill Valley · Marin County | — | — |
| D C Construction | David Francis Carrade | — | (415) 519 1625 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| D C Hauling | D C Hauling | — | (510) 517 4390 | Other | Novato · Marin County | — | — |
| D D M Construction | Ruppin Andreas | — | (415) 565 1272 | GC, remodel, ADU | Woodacre · Marin County | — | — |
| D F Electric | Richard Ambrose Fitzgerald | — | (415) 663 1392 | Electricians | Point Reyes Station · Marin County | — | — |
| D F O'sullivan Construction | Denis Frances O Sullivan | — | (415) 297 6432 | GC, remodel, ADU | Novato · Marin County | — | — |
| D Frey And Associates | Dennis Robert Frey | courtney@dfreyassociates.com | (415) 382 9292 | Other | Novato · Marin County | — | — |
| D K G Construction INC | Ronan Theobald Hanley | — | (415) 632 2618 | GC, remodel, ADU | Novato · Marin County | — | — |
| D Kelly & Sons Construction INC | Daniel Eugene Kelly | — | (415) 385 1018 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| D L H Construction | David Leonard Horton | — | (415) 595 0488 | GC, remodel, ADU | Novato · Marin County | — | — |
| D L Pro Builders | Wilmar Wilfido De Leon Y De Leon | — | (415) 793 8116 | GC, remodel, ADU | Greenbrae · Marin County | — | — |
| D O M U S | D O M U S | — | (415) 377 8442 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| D P Builders | D P Builders | — | (415) 254 3834 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| D R B Construction | David Roy Bickel | — | (415) 488 9418 | GC, remodel, ADU | Lagunitas · Marin County | — | — |
| D'rojas Landscape | D'rojas Landscape | — | (415) 299 4380 | Windows, patio, painters | San Rafael · Marin County | — | — |
| D2 Construction LLC | Darrel Patrick Denny | — | (415) 730 6775 | GC, remodel, ADU | Larkspur · Marin County | — | — |
| Dale Cranston | Dale Cranston | dalecranston2@hotmail.com | (415) 302 9752 | GC, remodel, ADU | Novato · Marin County | — | — |
| Dale Perry Construction Company | Perry Dale | — | (510) 230 1336 | GC, remodel, ADU | Novato · Marin County | — | — |
| Damner Construction | Nicholas Kent Damner | — | (415) 250 4670 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Dan Barrett Construction INC | Daniel Trevor Barrett | — | (415) 608 4075 | GC, remodel, ADU | Novato · Marin County | — | — |
| Dan Fix Landscape Construction Company | Michael Alain Pon | — | (415) 987 4693 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Dan Gillies Construction Services INC | Daniel Charles Gillies | — | (415) 819 4390 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| Dan Huebner | Dan Huebner | — | (415) 717 8588 | Electricians | San Rafael · Marin County | — | — |