Important Dates and Holidays
Bullet Jan 1 The Lien Date, when property taxes become a lien on the property. This is also the date when filing begins for various exemptions.
Bullet Feb 15 This is the last date you can file a timely claim for the Welfare, Museum, Cemetery, Homeowner, Veteran, Disabled Veteran, Historical Aircraft, and various miscellaneous exemptions. This is also the last date you can file a timely claim for a Church or Religious Exemption, and this is the last date you can file a timely Affdavit for 4 Percent Assessment of Commercial Vessels.
Bullet Feb 16 to Aug 1 The period for filing Affidavits for Partial Exemption of Commercial Vessels and Historical Aircraft.
Bullet Apr 1 This is the due date for filing Business Property Statements, Agricultural Property Statements, Apartment House Property Statements, and Mining and Quarrying Production Reports. It is set by the Assessor, and may vary from year to year. When mailed, these statements and reports must be postmarked by May 7 or they will be assessed a penalty.
Bullet Apr 10 The deadline for payment of the second installment of regular secured property taxes without penalty (other payment periods may apply for supplemental assessments and escaped assessments).
Bullet May 7 The final deadline for filing Property Statements. They must be either in our office or postmarked by the U.S. Post Office by this date.
Bullet May 16 to Aug 31 The period for filing claims for Senior Citizens Tax Assistance.
Bullet Jul 1 The date each year on which the Assessment Roll is delivered by the Assessor to the County Auditor.
Bullet Jul 2 to Nov 30 The period during which the Clerk of the Board of Supervisors accepts applications for changes in assessments (appeals) for the regular Secured Assessment Roll (other filing periods may apply for supplemental assessments and escaped assessments).
Bullet Aug 31 The deadline for payment of unsecured property taxes without penalty.
Bullet Dec 10 The deadline for payment of the first installment of regular secured property taxes without penalty (other payment periods may apply for supplemental assessments and escaped assessments). This is also the "late filing" deadline for Homeowner Exemptions--the last day you can file and still qualify for a partial exemption. Disabled Veteran Exemption applicants can file after this date and still qualify for a partial exemption.
2005 Holidays Observed: Offices Closed
Bullet Mon, Jan 17 Martin Luther King Day
Bullet Fri, Feb 11 Lincoln's Birthday
Bullet Mon, Feb 21 Presidents' Day
Bullet Mon, May 30 Memorial Day
Bullet Mon, Jul 4 Independence Day Holiday
Bullet Mon, Sep 5 Labor Day
Bullet Fri, Nov 11 Veteran's Day
Bullet Thu, Nov 24 Thanksgiving Day
Bullet Fri, Nov 25 Day after Thanksgiving
Bullet Mon, Dec 26 Christmas Holiday
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Sonoma County Assessor's Office
Santa Rosa, California