Most Popular Topics
Most Popular Forms
Standard file format is Portable Document Format (PDF). Free Adobe Reader required.
- Base Value Transfer-Person(s) Age 55 or Older (PDF - 88kb)
- Base Year Transfer-Person(s) 55 or older, or Disabled Person(s) Information (PDF - 94kb)
- Claim for Reassessment Exclusion for Transfer Between Parent and Child (PDF - 508kb)
- Claim for Reassessment Exclusion Information (PDF - 202kb)
- Decline in Market Value 2017/18 Informal Request for Reassessment (PDF - 220kb)
- Decline in Market Value Information Brochure (PDF - 136kb)
- Mailing Address Change Request Form (PDF - 88kb)
- Owner's Authorization for Inspection by Agent (PDF - 160kb)
- Preliminary Change of Ownership Report (PDF - 650kb)
- Property Characteristics Change Form - Owner Requested (PDF - 170kb)
Assessor Ron Thomsen
Thank you for visiting our Web site. The purpose of this site is to provide you with convenient access to assessment related information 24 hours a day, 7 days a week. On this site you will find general information regarding the property assessment process and assessment information more...
The Alameda County Assessor is pleased to announce that the AC Property App is now available on Android devices as well as Apple devices. You can lookup your assessed value, property taxes, and parcel map. You can even pay your property taxes right from the app. Download it from Google Play or the iTunes store.
General & Ownership Information
Business Personal Property:
Our business hours are from 8:30AM to 5:00PM
Monday through Friday except for holidays