Browse source-reviewed property tax appeal guides for New York. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
Nassau County: 2026 deadline guidance is March 31, 2026 for the 2027/28 tentative assessment. Guide: https://fairpath.app/property-tax-appeal/new-york/nassau-county
Source: Nassau County Assessment Review Commission, ARC 2027-28 Filing Brochure, https://www.nassaucountyny.gov/DocumentCenter/View/51758/ARC-Trifold-2027-28-english-EXTENDED?bidId=. Reviewed 2026-07-15.
Source: Nassau County Assessment Review Commission, Assessment Review on the Web, https://www.nassaucountyny.gov/arcwebcitizen/Jsp/HomePage.jsp. Reviewed 2026-07-15.
Source: Nassau County Government, Assessment Review Commission, https://www.nassaucountyny.gov/1510/Assessment-Review-Commission. Reviewed 2026-07-15.
Source: Nassau County Government, How to Appeal Your Assessment, https://www.nassaucountyny.gov/2207/How-to-Appeal-Your-Assessment. Reviewed 2026-07-15.