| Adg Power Solutions | Adg Power Solutions | — | (707) 975 5001 | Electricians | Santa Rosa · Sonoma County | — | — |
| Adobe Construction Company | Kyle Anthony Deidrick | info@adobeconstruction.com | (707) 364 3651 | Other | Penngrove · Sonoma County | — | — |
| Adobe Electric | Michael Luke Simmons | — | (707) 477 6522 | Electricians | Petaluma · Sonoma County | — | — |
| Adobe Telcom INC | Philip Yuke Tam | — | (707) 778 7908 | Other | Petaluma · Sonoma County | — | — |
| Adolfo Contreras Landscaping | Adolfo Contreras Landscaping | — | (707) 396 9798 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Adolfo Mendoza Concrete Construction Incorporated | Mendoza Adolfo | — | (707) 938 9906 | Other | El Verano · Sonoma County | — | — |
| Adrian General Landscaping | Adrian General Landscaping | — | (707) 478 9576 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Advanced Alternative Energy Solutions INC | Rikizo Ronald Turley | — | (707) 789 9537 | Other | Petaluma · Sonoma County | — | — |
| Advanced Building Solutions INC | Seth Wellington Nobmann | — | (707) 206 4044 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Advanced Construction Company INC | Eddie Hilton Ii Story | interested@domainmarket.com | (707) 291 2334 | GC, remodel, ADU | Penngrove · Sonoma County | — | — |
| Advanced Contracting | Lee Frederick Jones | — | (707) 360 8858 | GC, remodel, ADU | Sebastopol · Sonoma County | — | — |
| Advanced Earthworks | Advanced Earthworks | — | (707) 744 1554 | Other | Cloverdale · Sonoma County | — | — |
| Advanced Extraction Labs | Christian Ivan Hluz | — | (707) 523 3702 | Other | Santa Rosa · Sonoma County | — | — |
| Advanced Mobile Tile | Advanced Mobile Tile | — | (707) 241 5560 | Other | Petaluma · Sonoma County | — | — |
| Advanced Painting LLC | Daniel James Rego | — | (707) 540 5963 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Advanced Stormwater Protection INC | Marilyn Leona Geney | — | (707) 953 8903 | Other | Santa Rosa · Sonoma County | — | — |
| Aero Electric | Lauren Jefferson Mackey | — | (707) 978 4664 | Electricians | Santa Rosa · Sonoma County | — | — |
| Af Vines LLC | Andrew James Forchini | — | (707) 592 4750 | Windows, patio, painters | Healdsburg · Sonoma County | — | — |
| Affordable Asphalt | Affordable Asphalt | — | (707) 331 2874 | Other | Sebastopol · Sonoma County | — | — |
| Affordable Heating & Air Conditioning | Affordable Heating & Air Conditioning | — | (707) 953 3345 | HVAC | Santa Rosa · Sonoma County | — | — |
| Ag General Construction & Landscaping | Jose Alberto Calvillo Ortiz | — | (707) 328 3328 | GC, remodel, ADU | Rohnert Park · Sonoma County | — | — |
| Agave Green Landscapes | Erik Jonathan De La Torre Marquez | — | (707) 703 3660 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Agave Landscaping | Agave Landscaping | — | (707) 538 7496 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Agd General Engineering INC | Adam Gerald Dyck | — | (707) 319 8692 | Other | Cotati · Sonoma County | — | — |
| Aggio's Landscaping Service | Anthony Joseph Aggio | — | (707) 763 2480 | Windows, patio, painters | Petaluma · Sonoma County | — | — |
| Aggo Construction | Morales Javier | — | (415) 840 4004 | GC, remodel, ADU | Petaluma · Sonoma County | — | — |
| Aguiar Construction | John George Jr Aguiar | — | (707) 762 9538 | Other | Petaluma · Sonoma County | — | — |
| Aguila Construction | Delgado Aguilar Jose Reyes | — | (707) 612 5890 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Aguilar Tile Installation | Aguilar Arechiga Ampelio | — | (707) 889 0314 | Other | Santa Rosa · Sonoma County | — | — |
| Aguilar's Painting | Aguilar's Painting | — | (707) 703 0562 | Windows, patio, painters | Rohnert Park · Sonoma County | — | — |
| Aguiniga H INC | Cruz Hector Aguiniga | — | (707) 287 2783 | Pool | Cotati · Sonoma County | — | — |
| Ahlborn Fence & Steel INC | Cathy Ellen Ahlborn | — | (707) 573 0742 | Other | Santa Rosa · Sonoma County | — | — |
| Ahlborn Structural Steel INC | Thomas Christian Ahlborn | — | (707) 573 0742 | Other | Santa Rosa · Sonoma County | — | — |
| Ahlstrom Construction | Wayne Jerome Ahlstrom | — | (707) 571 1155 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |
| Air Connection | Mark Samuale Morelli | — | (707) 571 8384 | HVAC | Santa Rosa · Sonoma County | — | — |
| Air Doctor | Laurel Ann Mccarthy | — | (707) 584 5941 | HVAC | Rohnert Park · Sonoma County | — | — |
| Air Systems Innovations INC | Emilio Jose Morales | — | (707) 888 6460 | HVAC | Santa Rosa · Sonoma County | — | — |
| Air Works_mechancial Services | Wesley Earl Stetenfeld | — | (707) 807 3121 | HVAC | Santa Rosa · Sonoma County | — | — |
| Airhorn Painting | Airhorn Painting | — | (707) 481 1017 | Windows, patio, painters | Santa Rosa · Sonoma County | — | — |
| Aivaras Vilimas | Aivaras Vilimas | — | (707) 888 4769 | GC, remodel, ADU | Santa Rosa · Sonoma County | — | — |