| Steve Timmons Flooring | Steve Timmons Flooring | — | (707) 477 8643 | Other | Forestville · Sonoma County | — | — |
| Steve Turner Construction | Steven Craig Turner | — | (707) 479 9911 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Steve's Construction | Steven Christopher Coffin | — | (707) 364 2947 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Steve's Electric | Steven Dale La Rose | interested@domainmarket.com | (707) 799 0402 | Electricians | Guerneville · Sonoma County | — | — |
| Steve's Handyman Service | Steven Ross King | — | (415) 971 2999 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Steve's Hardwood Floors | Steve's Hardwood Floors | — | (415) 306 4152 | Other | Santa Rosa · Sonoma County | — | — |
| Steven Allen Construction & Developing INC | Steven Allen Christie | — | (707) 236 5509 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Steven E Berlin INC | Steven Edward Berlin | — | (707) 579 3600 | Other | Santa Rosa · Sonoma County | — | — |
| Steven Fredrick Weaver | Steven Fredrick Weaver | — | (707) 849 9125 | Electricians | Santa Rosa · Sonoma County | — | — |
| Steven J Abel Custom Builder | Steven J Abel Custom Builder | — | (707) 537 7909 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Steven James Raffety | Steven James Raffety | — | (415) 328 0814 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Steven Paul Ross | Steven Paul Ross | — | (415) 786 6780 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Steven Raffaini Plumbing And Radiant LLC | Steven William Raffaini | — | (707) 938 7611 | Other | Sonoma · Sonoma County | — | — |
| Steven Tuor Construction INC | Steven Anthony Tuor | — | (707) 477 1756 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Steven Wood Plumbing Service | Steven Lee Wood | — | (707) 769 8591 | Other | Petaluma · Sonoma County | — | — |
| Stewart Builders INC | Brent Allen Stewart | — | (707) 396 2582 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Sticks & Stones Construction INC | William Joseph Lage | — | (707) 477 6333 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Sticks & Stones Landscaping | Sticks & Stones Landscaping | — | (707) 495 8486 | Windows, patio, painters | Penngrove · Sonoma County | — | — |
| Stiles Builder | Stiles Builder | — | (707) 710 0768 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Stillpoint INC | Carl Lee Burchfiel | — | (707) 526 1300 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Stockham Construction INC | Boyd Lee Stockham | — | (707) 664 0945 | GC, remodel, ADU | Cotati · Sonoma County | — | — |
| Stocklin Iron Works | Stocklin Iron Works | — | (707) 538 2285 | Other | Santa Rosa · Sonoma County | — | — |
| Stokes Flooring | Stokes Flooring | — | (707) 478 5157 | Other | Sebastopol · Sonoma County | — | — |
| Stonehenge Landscape & Design | Stonehenge Landscape & Design | — | (707) 545 2142 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Stonewood Painting And Decorating INC | Morbitz Oliver | — | (707) 823 3667 | Windows, patio, painters | Sebastopol · Sonoma County | — | — |
| Stony Point Painting | Antonio Ramirez Brito | — | (707) 703 7133 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Stout's Heating & AC | Jeanne Anne Stout | — | (707) 527 1504 | HVAC | Santa Rosa · Sonoma County | — | — |
| Straight Edge Construction | Juan Pablo Tellez | — | (707) 971 9373 | GC, remodel, ADU | Sonoma · Sonoma County | — | — |
| Straight Forward Construction LLC | Dylan Kahulako Eichelberger | — | (808) 351 2485 | GC, remodel, ADU | Cazadero · Sonoma County | — | — |
| Straight Line Fence Co | Dewayne Scott Merrow | straightlinefence2002@yahoo.com | (707) 527 5745 | Other | Santa Rosa · Sonoma County | — | — |
| Strautman Gardening Pros INC | Andrew Michael Strautman | — | (757) 619 3461 | Windows, patio, painters | Forestville · Sonoma County | — | — |
| Streamline Painting & Decorating INC | Freddie Alfred Plourde | — | (707) 539 5293 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Strike Arc | Cortez Cesar | — | (707) 696 8284 | Other | Santa Rosa · Sonoma County | — | — |
| Stripe 'n' Seal INC DBA Aaron Paving & Sns Asphalt Services | Daniel Gordon Fowler | — | (707) 528 3377 | Other | Santa Rosa · Sonoma County | — | — |
| Striping Graphics | Jay Michael Klosevitz | — | (707) 793 9425 | Other | Cotati · Sonoma County | — | — |
| Stroupe Petroleum Maintenance INC | Howard Lang Stroupe | — | (707) 577 7307 | Other | Santa Rosa · Sonoma County | — | — |
| Stryker Builders INC | Mark Francis Stryker | — | (707) 843 1801 | GC, remodel, ADU | Camp Meeker · Sonoma County | — | — |
| Stryker Fire & Security | Luis Bernave Marron | — | (707) 595 8843 | Electricians | Santa Rosa · Sonoma County | — | — |
| Stuart Welding | Stuart Welding | — | (707) 545 5836 | Other | Santa Rosa · Sonoma County | — | — |
| Studio 101 General Building Contractors | Ramiro Albor Paredes | — | (415) 716 1126 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |