| Sonoma Custom Tile | Nicholas Alfred Lebaudour | — | (707) 996 2827 | Other | Petaluma · Sonoma County | — | — |
| Sonoma Demolition LLC | Adam Dean Sheppard | — | (707) 478 2302 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Sonoma Door & Sash | Sonoma Door & Sash | — | (707) 938-3719 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Sonoma Drywall & Insulation | Juan Carlos Patino Garcia | — | (707) 494 8035 | Other | Santa Rosa · Sonoma County | — | — |
| Sonoma Ecology Center | Steven Fleming Lee | — | (707) 996 0712 | Windows, patio, painters | Eldridge · Sonoma County | — | — |
| Sonoma Electric | Nathan Shine Weiner | — | (707) 933 6315 | Electricians | Sonoma · Sonoma County | — | — |
| Sonoma Electricians Of Santa Rosa | Sonoma Electricians Of Santa Rosa | — | (408) 413-2407 | Electricians | Santa Rosa · Sonoma County | — | — |
| Sonoma Fine Masonry | Sonoma Fine Masonry | — | (707) 328 2234 | Other | Sonoma · Sonoma County | — | — |
| Sonoma Glassworks | Sonoma Glassworks | — | (707) 939-0761 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Sonoma Green Landscape | Sonoma Green Landscape | — | (707) 396 0482 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Sonoma Hd Pool And Spa INC | Erick Trevor Brown | — | (707) 478 5433 | Pool | Rohnert Park · Sonoma County | — | — |
| Sonoma Home Watch | Sonoma Home Watch | info@sonomahomewatch.com | — | Inspectors | Sonoma · Sonoma County | — | — |
| Sonoma Hot Tubs & Pool Supplies - Sonoma | Sonoma Hot Tubs & Pool Supplies - Sonoma | — | (707) 781-9440 | Pool | Sonoma · Sonoma County | — | — |
| Sonoma Landworks | Thomas Jerome Finn | — | (707) 869 4500 | Other | Guerneville · Sonoma County | — | — |
| Sonoma Management | Sonoma Management | info@sonomamanagement.com | — | Property managers | Sonoma · Sonoma County | — | — |
| Sonoma Marin Electric INC | Ian Andrew Muskar | ianmuskar@sonomamarinelectric.com | (707) 396 1147 | Electricians | Sebastopol · Sonoma County | — | — |
| Sonoma Marin Property Management Inc. | Sonoma Marin Property Management Inc. | — | (707) 583-7775 | Property managers | Rohnert Park · Sonoma County | — | — |
| Sonoma Mission Gardens INC | David Angelo Fazzio | — | (707) 938 5743 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Sonoma Mountain Construction Company | Quentin Wesley Lloyd | quentin@sonomamountainconstruction.com | (707) 477 7424 | GC, remodel, ADU | Windsor · Sonoma County | — | — |
| Sonoma Mountain Landscape INC | Catherine Maria Kopshever | — | (707) 665 5051 | Windows, patio, painters | Windsor · Sonoma County | — | — |
| Sonoma Mountain Tree Care | Sonoma Mountain Tree Care | — | (707) 327 9886 | Tree | Boyes Hot Springs · Sonoma County | — | — |
| Sonoma Paint Center | Sonoma Paint Center | — | (707) 545-7984 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Sonoma Pool & Spa INC | Juan Diego Albor | — | (707) 396 7526 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Sonoma Pool Service | Sonoma Pool Service | info@sonomapoolservices.com | (707) 338-4688 | Pool | Sonoma · Sonoma County | — | — |
| Sonoma Power Solutions INC | William James Leeming | — | (707) 299 7985 | Electricians | Sonoma · Sonoma County | — | — |
| Sonoma Precision Painting | Sonoma Precision Painting | sonomaprecisionpainting@gmail.com | (707) 933 7330 | Windows, patio, painters | Sonoma · Sonoma County | — | — |
| Sonoma Properties | Sonoma Properties | info@sonomalh.com | (707) 939-2024 | Property managers | Sonoma · Sonoma County | — | — |
| Sonoma Pruner | Sonoma Pruner | — | (707) 738-9931 | Tree | Sonoma · Sonoma County | — | — |
| Sonoma Reinforcing INC | Gregory John Kinderman | general@sonomareinforcing.com | (707) 838 4328 | Other | Windsor · Sonoma County | — | — |
| Sonoma Remodel | Sonoma Remodel | — | (707) 486-8861 | Restoration | Sonoma · Sonoma County | — | — |
| Sonoma Residential Services LLC | Ryan William Trabert | info@sonomaresidentialservices.com | (707) 789 1946 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Sonoma Roofing | Sonoma Roofing | — | (844) 637-0554 | Other roofers | Sonoma · Sonoma County | — | — |
| Sonoma Second Home | Sonoma Second Home | — | (707) 395-8882 | Property managers | Healdsburg · Sonoma County | — | — |
| Sonoma Security Lock Safe & Key | John Alfred Duffy | — | (707) 938 4507 | Alarm and generators | Sonoma · Sonoma County | — | — |
| Sonoma Shoreline Plumbing | Sonoma Shoreline Plumbing | — | (707) 519 8220 | Other | Forestville · Sonoma County | — | — |
| Sonoma Shower Doors INC | Maurilio Jesus Lopez-Parra | — | (707) 284 1144 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Sonoma Siteworks & Engineering INC | Mark Wesley Altes | — | (707) 235 3249 | Other | Santa Rosa · Sonoma County | — | — |
| Sonoma Sparkies INC | Brandon Janvier Shugrue | agustinamingote@gmail.com | (707) 861 9484 | Electricians | Sebastopol · Sonoma County | — | — |
| Sonoma Splash | Sonoma Splash | — | (707) 933-4015 | Pool | Sonoma · Sonoma County | — | — |
| Sonoma Stainless | Sonoma Stainless | — | (707) 546 3945 | Other | Santa Rosa · Sonoma County | — | — |