| San Rafael Rock Quarry INC | Bill Toney Dutra | — | (415) 258 6876 | Electricians | San Rafael · Marin County | — | — |
| San Rafael Roofing | San Rafael Roofing | — | (628) 257-7759 | Other roofers | San Rafael · Marin County | — | — |
| Sanchez Landscaping | Sanchez Landscaping | interested@domainmarket.com | (415) 532 7413 | Windows, patio, painters | Novato · Marin County | — | — |
| Sandbank Construction INC | Matthew Gerard Burns | office@sandbankconstruction.com | (415) 595 8611 | GC, remodel, ADU | Novato · Marin County | — | — |
| Sandell Construction - General Contractor | Jeffrey Henry Sandell | — | (415) 491 4755 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Sandner Painting | Sandner Painting | — | (415) 302 1925 | Windows, patio, painters | Corte Madera · Marin County | — | — |
| Sandos Painting And Decorating | Sandos Painting And Decorating | — | (415) 259 1446 | Windows, patio, painters | Novato · Marin County | — | — |
| Sandra Bird Designs INC | Sandra Arlene Bird | — | (415) 927 1171 | GC, remodel, ADU | Kentfield · Marin County | — | — |
| Sands Construction | Eric Tuller Sands | — | (415) 516 4639 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Santos Construction | Roseli Frederic Santos Mazariegos | — | (415) 377 7364 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Sara M Schultz | Sara M Schultz | — | (415) 497 6236 | Windows, patio, painters | Corte Madera · Marin County | — | — |
| Sarah Judith Devito | Sarah Judith Devito | — | (510) 206 1934 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Sarah Winarske Garden Design | Sarah Winarske Garden Design | — | (415) 706 1682 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Saribalis Construction | George Andrew Jr Saribalis | — | (415) 302 9728 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Sasquatch Floors | Sasquatch Floors | — | (707) 708 1961 | Other | Novato · Marin County | — | — |
| Sattler Enterprises LLC | William Iii Sattler | — | (415) 699 7712 | Electricians | San Rafael · Marin County | — | — |
| Sausalito Construction INC | Gale Franklin Greisen | kendal@sausalitoconstruction.com | (415) 889 5281 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Savard Color INC | Brian Eugene Savard | — | (415) 407 4199 | Windows, patio, painters | San Rafael · Marin County | — | — |
| Savi Builders | Byron Amir Mejia | — | (415) 340 9450 | GC, remodel, ADU | Novato · Marin County | — | — |
| Savinov Electrical Voice And Data | Savinov Alexandre | — | (415) 225 1399 | Electricians | San Rafael · Marin County | — | — |
| Savior Brush Painting | Savior Brush Painting | — | (415) 845 2293 | Windows, patio, painters | Novato · Marin County | — | — |
| Saw Designs INC | Shaun Aaron Wood | — | (415) 602 9878 | GC, remodel, ADU | San Anselmo · Marin County | — | — |
| Say Builders INC | Marco Antonio Sr Say Gonon | estimating@saybuilders.com | (415) 524 5250 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Scc Electric INC | Charles Winslow Jr Slack | — | (415) 599 6545 | Electricians | Novato · Marin County | — | — |
| Scenic Construction | John Paul Coffey | — | (415) 235 7399 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Schalich Brothers Construction INC | Jarrett James Craig Sigler | — | (415) 382 7733 | GC, remodel, ADU | Novato · Marin County | — | — |
| Schalich Builders | Schalich Builders | — | (415) 828 4130 | GC, remodel, ADU | Novato · Marin County | — | — |
| Schleicher Construction | Karl Davies Schleicher | lucas@schleicherconstruction.com | (415) 298 8094 | GC, remodel, ADU | Fairfax · Marin County | — | — |
| Schmidt Construction | Allen Maynard Schmidt | — | (415) 892 5196 | GC, remodel, ADU | Novato · Marin County | — | — |
| Schrock Construction | Brian Edward Schrock | — | (415) 225 2628 | GC, remodel, ADU | Novato · Marin County | — | — |
| Schwerin Fire Protection | Robert Charles Schwerin | — | (650) 296 9045 | Other | Novato · Marin County | — | — |
| Scopazzi Construction INC | John Steven Scopazzi | — | (415) 720 5881 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Scorpion Scaffolding INC | Marcia Oneida Rivera Varela | — | (415) 261 3946 | Other | San Rafael · Marin County | — | — |
| Scott & Warner Builders INC | Scott Michael Lane | — | (415) 331 9100 | GC, remodel, ADU | Sausalito · Marin County | — | — |
| Scott Controls INC | Leonard Eugene Jr Lynch | — | (415) 206 7120 | Electricians | Tiburon · Marin County | — | — |
| Scott Hurd Painting | Scott Hurd Painting | — | (415) 336 2121 | Windows, patio, painters | Fairfax · Marin County | — | — |
| Scott Kern | Scott Kern | — | (925) 989 6198 | GC, remodel, ADU | Mill Valley · Marin County | — | — |
| Scott Phraner Company | Robert Scott Phraner | — | (415) 246 7797 | GC, remodel, ADU | San Rafael · Marin County | — | — |
| Scott Refrigeration & A/c | Scott Refrigeration & A/c | — | (415) 265 7383 | HVAC | Corte Madera · Marin County | — | — |
| Scozzafava And Sons Plumbing | Scozzafava And Sons Plumbing | — | (415) 250 7643 | Other | Novato · Marin County | — | — |