• 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

Please Note Important Filing Deadlines

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.

eFile Business Property Statement

eFile Your Property Statement

Please note that the login information from your 2018 Online Property Statement Filing Letter is required. We have begun mailing out the Notice to File letters. Contact our office if you haven't received your letter by the second week of March.

eFile Your Business Property Statement Now


William F. Rousseau

County Clerk-Recorder-Assessor-Registrar of Voters

Business 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


Assessor's Office

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

Electronic Filing

eFile Business or Agricultural Property Statement

Filing Deadline: 5/7/2018

eFile Your Property Statement

Login information from your 2018 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 AnnouncementThe 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.