Sonoma County Property Appraiser & Tax Assessor
Real property appraisal records, parcel search lookup, property tax rates, and assessment protest deadlines for Sonoma County, California.
Sonoma County Assessor's Office Information
Sonoma County Appraisal & Assessment Office, Santa Rosa, CA 06001
Get Driving Directions ↗Monday - Friday: 8:00 AM - 4:30 PM (Local Time)
Closed on state & federal holidays.
(213) 249-3107
County Assessor Portal / OpenData
Sonoma County Property Tax Calculator
Estimated using Sonoma County's effective tax rate of 0.74% (Assessment ratio: 100%)
Appealing Your Sonoma County Assessment
July 2 through November 30 (or September 15 in counties where assessor sends assessment notices by August 1).
Under California property tax law, property owners in Sonoma County have the legal right to challenge an assessed valuation that exceeds fair market value, is unequally appraised compared to neighboring properties, or contains clerical errors.
Contact the Sonoma County Assessor's Office to review your property record card, verify square footage, and present recent comparable sales (comps).
If informal review does not resolve the valuation, file a written notice of appeal with the County Assessment Appeals Board (AAB) before the statutory deadline.
Was Your Sonoma County Home Over-Assessed This Year?
Studies show up to 30% to 60% of US residential properties are overvalued by automated municipal algorithms. Protesting your assessment before the statutory deadline can lower your tax bill by an average of $1,100/year.
Sonoma County Homestead Exemptions & Tax Relief
Homeowners in Sonoma County who occupy their home as their permanent primary residence may qualify for property tax reductions under state and local homestead programs:
Proposition 13 limits general property tax to 1% of assessed value and limits annual assessed value inflation to a maximum of 2%. Standard $7,000 homeowners exemption.
Proposition 19 allows homeowners 55+ or severely disabled to transfer taxable base-year value anywhere in California. Disabled Veterans Exemption up to $161,083 (basic) or $241,627 (low income).
Need Deed, Lien, or Title Records for Sonoma County?
While the Property Appraiser values real estate for taxation, official legal property transfers, warranty deeds, mortgages, and marriage records in Sonoma County are maintained by the County Clerk & Recorder.
Frequently Asked Questions
Where is the Sonoma County Property Appraiser office located?
The official Sonoma County property appraisal and tax assessment office is located at Sonoma County Appraisal & Assessment Office, Santa Rosa, CA 06001. Operating hours are typically Monday - Friday: 8:00 AM - 4:30 PM (Local Time). You can reach the customer service staff by phone at (213) 249-3107.
What is the property tax rate in Sonoma County, CA?
The average effective property tax rate in Sonoma County is approximately 0.74%. For a home with the median county market value of $713.000, the estimated annual property tax is about $5276 per year.
How do I search for a property or parcel in Sonoma County?
You can look up property record cards, assessed valuations, ownership history, and parcel boundary maps online through the official Sonoma County parcel search portal: https://sonomasheriff.gov/assessor/parcel-search.
When is the deadline to appeal my property assessment in Sonoma County?
Property valuation protests and appeals in Sonoma County must be submitted by: July 2 through November 30 (or September 15 in counties where assessor sends assessment notices by August 1). Appeals are formally reviewed and heard by the County Assessment Appeals Board (AAB).
How does the Homestead Exemption work in Sonoma County?
Proposition 13 limits general property tax to 1% of assessed value and limits annual assessed value inflation to a maximum of 2%. Standard $7,000 homeowners exemption. Additional exemptions are available for senior citizens (65+) and disabled military veterans (Proposition 19 allows homeowners 55+ or severely disabled to transfer taxable base-year value anywhere in California. Disabled Veterans Exemption up to $161,083 (basic) or $241,627 (low income).).
Adjacent & Neighboring County Appraisers
County Overview
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