• 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 75x40Please note: The deadline to file a 2018-19 Assessment Appeal was November 30th, 2018. You may file a 2019-2020 Informal Request for Decline in Market Value Request between January 1st and June 30th.

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 Your Property Statement

The deadline to file your 2019 Business Property Statement is Tuesday, May 7th at 5:00 PM. The 2019 Notice to File letters are in currently being mailed out. Please contact our office if you haven't received your letter by February 28th. Revenue and Taxation Code section 441(b)

eFile your Business Property Statement now


Deva Marie Proto

County Clerk-Recorder-Assessor-Registrar of Voters

Office Hours

Monday – Tuesday
8:00 AM – 5:00 PM
8:00 AM – 4:00 PM
Thursday – Friday
8:00 AM – 5:00 PM

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

Business Property Hours

Monday - Friday
Open 9:00 AM – 4:00 PM

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: 5/7/2019 at 5:00 PM

eFile Your Property Statement

Login information from your 2019 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.

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.