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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
Assessment Review Calendar
Rules of Procedure
Information for Property Owners

Nassau County Tax Lien Sale
Annual Tax Lien Sale
Public Notice

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

    Matthew R. Cronin, IAO

    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?
View All
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  6. County Executive
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  7. County Legislature
    1. County Legislature Home
    2. What We Do
    3. Legislators
      1. Contact Form Confirmation Page
      2. District 1 - Kevan Abrahams
        1. Map of District 1
        2. District 1 Event Videos
        3. LD1 Newsletter
      3. District 2 - Siela A. Bynoe
        1. Map of District 2
      4. District 3 - Carrié Solages
        1. District 3 Map
      5. District 4 - Denise Ford
        1. District 4 Map
      6. District 5 - Debra Mulé
      7. District 6 - C. William Gaylor III
        1. Map
      8. District 7 - Howard J. Kopel
        1. District 7 Map
      9. District 8 - John J. Giuffre
        1. District 8 Map
      10. District 9 - Richard J. Nicolello
        1. District 9 Map
      11. District 10 - Mazi Melesa Pilip
        1. District 10 Map
      12. District 11 - Delia DeRiggi-Whitton
        1. District 11 Map
      13. District 12 - James D. Kennedy
        1. District 12 Map
      14. District 13 - Thomas McKevitt
      15. District 14 - Laura Schaefer
        1. District 14 Map
      16. District 15 - John R. Ferretti Jr.
        1. District 15 Map
      17. District 16 - Arnold W. Drucker
      18. District 17 - Rose Marie Walker
        1. District 17 Map
      19. District 18 - Joshua A. Lafazan
        1. DISTRICT 18 - JOSHUA A. LAFAZAN
        2. LD18 Events
        3. Government Internship Opportunities
        4. Thank you
      20. District 19 - Steven D. Rhoads
        1. District 19 Map
    4. History
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    15. FOIL Requests
    16. RECENT LEGISLATION
    17. Important COVID-19 Resources
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    19. Newsletters
    20. NYS COVID-19 TESTING SITES AND MASS VACCINATION SITES
  8. County Clerk
    1. County Clerk Home
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    15. Fees
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    16. Extreme Risk Protection Order (ERPO)
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    23. Supreme Court Decisions
    24. Court File Requisition Form
    25. Annual Reports
    26. FAQs
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    28. Current Operating Procedures
  9. County Comptroller
    1. Biography
    2. County Comptroller's Office Home
      1. County Checkbook and County Contracts
    3. Open Nassau Transparency Portal
      1. Finance Reports
      2. Open Checkbook
      3. Open Payroll
      4. Open Budget
    4. Field Audits
      1. Field Audits
      2. Field Audits Archive
    5. County Finances
      1. Financial Reports
      2. County Checkbook
      3. County Contracts
      4. Archived County Contracts
    6. Newsroom
      1. Newsroom Home
    7. 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
    8. Living Wage
      1. Covered Employers
      2. Living Wage Advisory Committee
      3. Living Wage Complaint Form
      4. Living Wage Compliance & Annual Reports
    9. Employment Opportunities
    10. Vendor Claims
      1. Resources for Nonprofits
        1. County Guides and Forms
        2. Federal & State Regulations and Industry Resources
      2. FAQs
    11. Fact Sheets and Information
    12. Contact Us
    13. FOIL Requests
  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. Home Improvement Licensing
        1. Who Must Be Licensed?
        2. Home Improvement Application
        3. Insurance Requirements
      2. Consumer Checklist for Home Improvement Contract
  11. COVID-19 INFORMATION
    1. COVID-19 Home
    2. COVID-19 Cases In Nassau County (MAP)
    3. Report A Complaint
    4. Downloads & Documents
    5. Boost Nassau Recovery Resources
      1. HAP App FAQ
    6. COVID-19 Vaccine Information
    7. COVID-19 TESTING
    8. COVID-19 Data & Resources
    9. Nassau School Recovery Resource Portal
    10. COVID-19 Isolation/Quarantine Forms
  12. District Attorney
    1. District Attorney Home
  13. Education
    1. Colleges, Universities and Other Schools
    2. Training and Education
  14. Elected Officials
  15. Emergency Services
    1. Emergency Services & Homeland Security
    2. Emergency Health
  16. Employment
  17. Facts, Stats & Maps
    1. History of Nassau County
    2. History of Nassau County's Seal
    3. Nassau County Seal Images
    4. IT PMO Documents
  18. Feedback & Complaints
  19. Getting Involved
  20. Health
  21. Housing Assistance
    1. HEALTH DEPARTMENT PROGRAMS AND TELEPHONE NUMBERS
  22. Law Enforcement
    1. Nassau County Law Enforcement
    2. New York State Criminal Justice Reform
    3. Courts & Justice
  23. Laws, Regulations & Codes
  24. Moving to Nassau County
    1. Cities, Towns and Villages A-Z
    2. Cities, Towns & Villages
  25. Policies and Documents
  26. Transportation
    1. Buses and Trains
    2. Taxi Service
    3. Nassau Roads & Traffic
  27. Vendor Portal
    1. Vendor Accounts and Claims
    2. Chief Procurement and Compliance Officer
    3. Department of Shared Services Office of Purchasing and Solicitation Bid Boards
    4. Vendor Diversity
    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
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