The Sonoma County Assessor's Office is open Monday through Friday, 8 am to 5 pm. Please note our holiday schedule below.
Si necesita assistencia en Español favor de llamar a la oficina (707) 565-6075 entre las 8:00 am y 5:00 pm de Lunes a Jueves.
The Sonoma County Clerk uses the Section 508 standards as guidelines for pages within our website. We are actively engaged in the ongoing process of testing, developing, and updating our website for compliance with these accessibility standards. If you need accessibility assistance, please visit our Accessibility Assistance Information page.
| Email Janice Atkinson. | theassessor@sonoma-county.org |
|---|---|
| Email regarding Business Property eFile Questions. | BusinessProperty@sonoma-county.org |
| (707) 565-1888 | Assessor Main Office: Information |
|---|---|
| (707) 565-6075 | Información en Español (Lunes a Jueves) |
| (707) 565-3317 | Assessor Main Office: Fax |
| (800) 244-1034 | Assessor Main Office: Toll Free in Sonoma County |
| (707) 565-1330 | Assessor Business Property: Information |
| (800) 797-4707 | Assessor Business Property: Toll Free in Sonoma County |
| (707) 565-1886 | Homeowner Exemptions |
| (707) 565-2861 | Aircraft Assessments |
| (707) 565-2844 | Boat Assessments |
| (707) 565-1888 | Real Estate Assessments |
| Friday, Jan 1 | New Year's Day (County Holiday Observed) |
|---|---|
| Monday, Jan 18 | Martin Luther King Jr Day |
| Friday, Feb 12 | Lincoln's Birthday |
| Monday, Feb 15 | Presidents' Day |
| Monday, May 31 | Memorial Day |
| Monday, Jul 5 | Independence Day Holiday |
| Monday, Sep 6 | Labor Day |
| Thursday, Nov 11 | Veteran's Day |
| Thursday, Nov 25 | Thanksgiving Day |
| Friday, Nov 26 | Day after Thanksgiving |
| Friday, Dec 24 | Christmas Day (County Holiday Observed) |