Clerk-Recorder-Assessor
I am honored and excited to be serving as your Clerk-Recorder-Assessor and Registrar of Voters. Our office provides so many core vital services to the public and we believe in the importance of doing so fairly, efficiently and with great customer service.
I look forward to building on the successes we have had in the past, while embracing many future improvements.
Deva Marie Proto
Assessor
The Assessor’s Office is responsible for providing accurate and timely property assessments and for determining eligibility for various property tax exemptions and exclusions.
Clerk-Recorder
The County Clerk's Office issues marriage licenses, filing fictitious business name statements, processing notary bonds, handles environmental documents, and performs civil marriage ceremonies. The County Clerk Division also issues certified copies of marriage, birth and death records on behalf of the County Recorder.
The Recorder's Office maintains various land and finance documents for Sonoma County. Typical land documents include deeds, leases, mining claims, subdivision maps, homestead declarations and records of survey. Typical finance documents include trust deeds, notices of default, reconveyances, and various liens. This division of the Clerk-Recorder-Assessor also collects the Documentary Transfer Tax when real property exchanges hands.
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Sonoma County achieves record-high net assessment roll of more than $127 billion
Sonoma County Clerk-Recorder-Assessor Deva Marie Proto announced today that the county’s net assessment roll has reached an all-time high of $127,016,463,045. This marks a 5.44 percent increase compared to last year’s assessment roll, reflecting the value of all real and business property in Sonoma County as of Jan. 1. The 2025-26 assessment roll has been officially delivered to the Sonoma County Auditor-Controller-Treasurer-Tax Collector.