Websearch secured, supplemental and prior year delinquent property taxes. Secured tax bills are payable online from 10/4/2023 to 9/1/2024. Most supplemental tax bills are. Weba supplemental tax bill reflects any increase in property tax generated by a supplemental “event” (change in ownership or new construction). A supplemental assessment becomes effective on the first day of the month following the month in which the supplemental.
A Taxing Travesty: Alameda County's Supplemental Property Tax Unraveled
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