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Nassau County, NY
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Fines & Taxes

Property TaxesProperty Assessments
Assessment Lookup
How to Challenge Your Assessment
Assessment Challenge Forms & Instructions
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Information for Property Owners

Nassau County Tax Lien Sale
Annual Tax Lien Sale
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Property Taxes-Assessment
How is My Property Tax Determined?
Property Classification
Property Tax & Assessment FAQ
Tax Assessment Review Forms

Nassau County Traffic and Parking Violations Agency

Contact Us

  1. Acting County Assessor Adamo

    County Assessor

    Joseph A. Adamo

    Chief Deputy Assessor

    Michele Spara

    Contact Us

    County Assessor's Office

    240 Old Country Road 4th Floor
    Mineola, NY 11501
    Ph: 516-571-1500

    Hours

    Monday - Friday
    8 a.m. - 4:30 p.m.

FAQs

  1. Is my property assessment a tax?
  2. What role does the annual assessment of my property play in determining my property taxes?
  3. Won’t my property taxes go down if my assessment goes down?
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  6. County Executive
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    3. NYS Executive Order 203
  7. County Legislature
    1. County Legislature Home
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    3. Legislators
      1. District 1 - Scott Davis
        1. Map of District 1
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        3. LD1 Newsletter
      2. District 2 - Siela A. Bynoe
        1. Map of District 2
      3. District 3 - Carrié Solages
        1. District 3 Map
      4. District 4 - Patrick Mullaney
        1. District 4 Map
      5. District 5 - Seth Koslow
      6. District 6 - Debra Mulé
        1. Map
      7. District 7 - Howard J. Kopel
        1. District 7 Map
      8. District 8 - John J. Giuffre
        1. District 8 Map
      9. District 9 - Scott Strauss
        1. District 9 Map
      10. District 10 - Mazi Melesa Pilip
        1. District 10 Map
      11. District 11 - Delia DeRiggi-Whitton
        1. District 11 Map
      12. District 12 - Michael Giangregorio
        1. District 12 Map
      13. District 13 - Thomas McKevitt
      14. District 14 - C. William Gaylor III
        1. District 14 Map
      15. District 15 - John R. Ferretti Jr.
        1. District 15 Map
      16. District 16 - Arnold W. Drucker
      17. District 17 - Rose Marie Walker
        1. District 17 Map
      18. District 18 - Samantha Goetz
        1. Committees
        2. LD18 Events
        3. Seminars
        4. Citizen/Business of the Month
        5. District 18 - Samantha Goetz
      19. District 19 - James Kennedy
        1. District 19 Map
    4. History
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    17. Important COVID-19 Resources
    18. Mental Health Resources for Children and Families
    19. Las Vegas Sands Nassau Coliseum Site Documents
      1. Sands DEIS
      2. Sands DEIS Appendices
      3. Sands DEIS Text
  8. County Clerk
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    14. E-Filing New York Unified Court System
    15. Fees
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    16. Extreme Risk Protection Order (ERPO)
    17. Veteran Services
    18. Passport Services
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    23. Supreme Court Decisions
    24. Court File Requisition Form
    25. Annual Reports
    26. FAQs
    27. FOIL Requests
    28. Current Operating Procedures
  9. County Comptroller
    1. County Comptroller's Office Home
      1. County Checkbook and County Contracts
    2. Biography
    3. Open Nassau Transparency Portal
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      2. Open Checkbook
      3. Open Payroll
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    7. Field Audits
    8. Employee & Retiree Health Benefits
      1. Health Benefits Home
      2. Retirees
        1. Open Enrollment for Retirees
        2. Forms for Retirees
        3. Rate Sheet for Retirees
      3. Active Employees
        1. Open Enrollment for Active Employees
        2. Forms for Active Employees
        3. Rate Sheet for Active Employees
      4. Open Enrollment
      5. Recent Updates
      6. Forms
        1. Active Employees Forms
        2. Retiree and All Other Plan Enrollees Forms
      7. FAQ
        1. New Employees
        2. Covering Your Domestic Partner
        3. Health Insurance Buy-Back Program
        4. Continuing Health Benefits
        5. Continuation of Benefits as a Vestee
        6. Dental Insurance - HealthPlex
        7. Covering Your Spouse
        8. Coverage Dependents - Empire Plan - NYSHIP
        9. Smart Savings
        10. COBRA
        11. Survivors of Deceased County Employess & Retirees
        12. Vision Care Benefits - Davis Vision
        13. Covering Your Children
        14. Coverage for Dependents - HMO's
        15. Temporarily Off Payroll
        16. Benefits Retirement for Employess Over 55
        17. Retirees
        18. Providing Supporting Documentation
        19. Flexible Spending Account
      8. Our Providers
      9. Contact Us
    9. Nassau County Senior Discounts Program
    10. County Finances
      1. Financial Reports
      2. County Checkbook
      3. County Contracts
      4. Archived County Contracts
    11. Community Outreach and Events
    12. Living Wage Law
      1. Covered Employers
      2. Living Wage Advisory Committee
      3. Living Wage Complaint Form
      4. Living Wage Compliance & Annual Reports
    13. Employment Opportunities
    14. FOIL Requests
    15. Contact Us
  10. County Services
    1. For Seniors
      1. Entitlements, Assistance & Discounts
      2. Recreation, Clubs & centers
    2. For Veterans
      1. Veterans Services & Facilities
        1. Veteran's Counseling
        2. Veterans Services
      2. County Clerk Veterans Services
      3. Important Phone Numbers
      4. Veterans' Real Property Tax Exemptions
      5. Federal Benefits for Veterans
      6. State Benefits for Veterans
      7. Telephone Service Discount
    3. For Disabled Residents
    4. For Minority Residents
      1. Human Rights Commission
      2. Job Development Center
    5. For Property Owners
      1. Property Assessment & Appeal
      2. Property Tax Exemptions
      3. Building & Improving a House
      4. Property Taxes
    6. For Children & Youth
      1. Children's Advocacy & Support
      2. Children's Protective Services
      3. Children & Youth
    7. For Consumers
      1. Consumer Checklist for Home Improvement Contract
  11. District Attorney
    1. District Attorney Home
  12. Education
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  13. Elected Officials
  14. Emergency Services
    1. Emergency Services & Homeland Security
    2. Emergency Health
  15. Employment
  16. Facts, Stats & Maps
    1. History of Nassau County
    2. History of Nassau County's Seal
    3. Nassau County Seal Images
    4. IT PMO Documents
  17. Feedback & Complaints
  18. Getting Involved
  19. Health
  20. Housing Assistance
    1. HEALTH DEPARTMENT PROGRAMS AND TELEPHONE NUMBERS
  21. Law Enforcement
    1. Nassau County Law Enforcement
    2. New York State Criminal Justice Reform
    3. Courts & Justice
  22. Laws, Regulations & Codes
  23. Moving to Nassau County
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  24. Policies and Documents
  25. Temporary Districting Advisory Commission
  26. Transportation
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    2. Taxi Service
    3. Nassau Roads & Traffic
  27. Vendor Portal
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    2. Chief Procurement and Compliance Officer
    3. Department of Shared Services Office of Purchasing and Solicitation Bid Boards
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    5. Public Entities
  28. Voting & Elections
  29. Vendor Accounts and Claims
    1. New Vendor Portal Registration
    2. New Principal Vendor Portal Registration
    3. Vendor Disclosures & Claims
    4. FAQ
  30. Title VI, ADA, and Language Access
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