Taxed To The Max: Alameda County's Supplemental Property Tax Reaches A Fever Pitch

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. 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.