Learn about Business Property Statements and who must file them
Property value, ownership records and property information
Farms, vineyards and ranches must file an annual Agricultural Business Property Statement
Disaster Relief
Williamson Act

Welcome to the Assessor's Office

Business Property Hours Changing

Temporary Reduction in Business Property Phone and In-Person Service Hours

As of April 8^th, the Business Property office hours are 9:00 am - noon and 1:00 pm to 4:00 pm.

Properties Affected by the Floods

Has your property suffered or been destroyed by the Sonoma County Floods? The Assessor's Office is here to help you during this difficult time.

It is important to know that you have 12 months from the event date to file the Calamity Damage Reassessment form, so you can wait until your insurance agency has inspected your property before filling out the form.

If you will be living somewhere else for an extended period of time, please fill out a Change of Mailing Address Form right away so that we can contact you if needed.

Quick-links:

Latest News

2018 Property Value Online Search
Published on July 19, 2018
Search 2018 Assessed Value and Change Notices online. Please note that you will need the Assessor's Parcel Number or street address to search parcel information.

Disaster Relief

California's property tax laws allow the Assessor to adjust assessed values due to a major calamity such as fire, earthquake, or flooding which damages or destroys your real or personal property.

More about Disaster Relief

Temporary Decline in Market Value

Temporary reductions to your property's taxable value on the Assessment Roll can be initiated by either you or the Assessor.

More about Temporary Decline in Market Value and how to apply

Business and Agricultural Property

Machinery, equipment, tools, furniture, fixtures, and leasehold improvements held or used in connection with a trade or business are taxable. In addition, most boats, aircraft and mobile homes are also taxable. Supplies on hand, demonstration equipment, and construction in-progress are also assessable.

More about Business Property taxes and filing

Ways to Save on Taxes

There are a variety of options available for lowering your property taxes. Each of these exemptions, exclusions or provisions has specific qualifications.

More about Property Tax Savings

Clerk-Recorder-Assessor

Deva Marie Proto

County Clerk-Recorder-Assessor-Registrar of Voters

Office Hours

Monday – Tuesday: 8:00 AM – 5:00 PM
Wednesday: 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

Address

Assessor's Office

585 Fiscal Drive

Room 104F

Santa Rosa, CA 95403

38.4659106, -122.7251807

Google Maps™ Directions

Electronic Filing

Deadline to File Business Property Statements Has Passed

The deadline was 5/7/2019. We will mail the 2020 Notice to File letters February 2020.

Revenue and Taxation Code section 441(b)

Flood Damaged Property

Search Parcel Numbers

Start by looking up the Assessor's Parcel Number (APN) with this tool using the full, or partial address

Flood Damaged Property

Calamity Damage Claim Form

Disaster Relief

Parcel Number Search

Change of Mailing Address Form

Fire Damaged Property

Search Parcel Numbers

Start by looking up the Assessor's Parcel Number (APN) with this tool using the full, or partial address

Notice of Correction FAQs

2017 Fire Calamity FAQs

Fire-Related Property Tax FAQs

Property Taxes

Important Forms

Change of Mailing Address

Authorization to Access Confidential Files

Proposition 50: Governor Declared Disaster (BOE-65-P)

Proposition 171: Intercounty Transfer of Base Year Value Principal Residence in Governor-Declared Disaster (BOE-65-PT)

Transfer of Base Year Value Replacement Dwelling (55 or older – BOE-60-AH)

Related Resources

Assessor Parcel Number Lookup

Calamity Damage Provision

Disaster Relief

List of Counties Accepting Section 69 & Proposition 90 Transfers

Active Scams

Read About Current Scams

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

Property Value

Search Parcel Information

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.

Change of Address and Authorization Forms

Authorization to Access Confidential Files

Change of Mailing Address

Assessment Appeals

About Assessment Appeals

Office of the Clerk of the Assessment Appeals Board

The Assessment Appeals Board is an independent agency under the authority of the Sonoma County Board of Supervisors

Important Notice

Important Information 75x40 The 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.