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In Nassau County, all non-ad valorem special assessments are a flat rate with the exception of SAISSA, which uses a value-based calculation. Each special assessment board calculates the amount to be assessed and provides the Tax Collector with a non-ad valorem assessment roll. These amounts are added to the tax roll and are billed in the total amount due for each parcel.

Taxpayer questions regarding a special assessment should be directed to the contact for that entity: