Property Assessment

The Nassau County Department of Assessment establishes values for land and improvements as the basis for property taxes.

County

Nassau County Department of Assessment (516) 571-1500 General Information Provides information from the Department of Assessment on rules, procedures, exemptions and general information.

Index of Services
Includes frequently asked questions and detailed information on tax exemptions.

Property Tax Exemptions
Includes information on veterans, senior citizens, and new construction exemptions.

Is my property assessment a tax?
What role does the annual assessment of my property play in determining my property taxes?
Won’t my property taxes go down if my assessment goes down?

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Assessment Home
Fines & Taxes
1. What the Department of Assessment Does
2. How Is My Property Tax Determined?
Exemption Brochures
Exemption Forms
Tax Map & Apportionment
Frequently Asked Questions
Freedom of Information Law & Fees
Glossary of Assessment Terms
Important Dates
Online ASIE Forms
Property Search
Contact
Rules and Regulations (PDF)
Assessment Rolls
FOIL Requests
Class 3 Notice of Tentative Assessed Values
Reassessment Methodologies
News Releases