• Russian River Valley

    Preserving agricultural and open space lands

  • Business Brewery

    File a Business Property Statement

  • Vessel Property

    File a Vessel Property Statement

  • Horse Property Statements

    File a Horse Property Statement

Assessor Forms

Important Notice

Important Information 75x40The regular filing period for the 2020-21 annual assessment period is now closed. If you feel your market value has declined, you many file an Informal Request for Decline in Market Value between January 1 and June 30, 2021.

Some forms have specific deadlines to file, others can be filed any time during the year or must be filed within a set number of days past an event.

If there is not a specific deadline listed below, please refer to the form instructions, information page, or contact our office for assistance.

Read more about important dates and deadlines

eFile Business Property Statements

eFile Your Property Statement

Upcoming Filing Deadline is Friday, May, 7that 11:59 pm

Note: You must use the login information from your 2021 Online Property Statement Filing Letter. Please call our office for assistance if you have not received your letter by March 15th, or have lost your letter.

eFile Your Statement Now


Deva Marie Proto

County Clerk-Recorder-Assessor-Registrar of Voters

Office Hours

Monday – Tuesday
9:00 AM – 1:00 PM
12:00 PM – 4:00 PM
Thursday – Friday
9:00 AM – 1:00 PM

Temporary Limited Hours

Note: Document processing and fee transactions end 30 minutes prior to closing


Assessor's Office

585 Fiscal Drive
Room 104F
Santa Rosa, CA 95403
38.4659106, -122.7251807

Electronic Filing

eFile Business or Agricultural Property Statement

Upcoming Filing Deadline: 5/7/2021 at 11:59 PM

eFile Your Property Statement

Login information from your 2021 Online Property Statement Filing Letter is required.

Assessment Appeals

Assessment Appeals Forms

Assessment Appeals Calculator

Assessment Appeals forms are available through the Assessment Appeals Board.

Property Value

Search Parcel Information

Sonoma County Property Value

Search current maps, parcel information, property values, change notices and more

Online Mapping

ActiveMap Viewer Collection
Access location-based information pertaining to a specific subject and/or area within unincorporated Sonoma County.

Fire Rebuild Operations

Active Scams

Read About Current Scams

Scam Alert!

Active scams for services that are offered at our office for low or no cost!

Important Notice

Important Information 75x40The staff of the Clerk-Recorder-Assessor's Office are forbidden by California legal codes to practice law or provide legal advice; this prohibition includes giving advice about what forms you might need or how you should fill them out.