Tax relief and valuation review
A homestead exemption, senior-relief program, or valuation protest can change the amount a homeowner owes—but only if the filing reaches the right local office in the correct window. Use the verified county guidance below as your working checklist, then confirm the current form and deadline with Nassau County Department of Assessment.
Relief programs
The filing guidance for this county is: Applications for the 2027/28 Nassau property-tax year must be received by January 4, 2027; STAR is applied for through New York State, not Nassau County. Use the official form or application channel, provide the residence and ownership documentation requested, and keep a copy of the submission.
Open homestead applicationNassau's Senior Citizens Property Tax Exemption is for eligible homeowners age 65 or older with income of $58,399 or less and may reduce assessed value by up to 50%; Nassau also has New York's Enhanced STAR benefit with a 2026 income limit of $110,750.
For Nassau Class 1 residential property, New York Real Property Tax Law §1805 limits assessed-value increases to 6% in one year and 20% over five years, excluding additions and renovations. Class 2 and 4 property uses transitional assessments rather than that Class 1 cap.
Appealing an assessment
Use the valuation notice and the county’s published protest guidance to determine the last day to file. Do not assume the payment deadline controls the appeal.
Gather comparable sales, photographs, repair records, appraisal evidence, property characteristics, and any documentation that explains why the assessed value is incorrect.
Submit through the official channel, save the confirmation, and attend the board or review hearing if one is scheduled. An appraiser or attorney can help evaluate evidence when the value or stakes are substantial.
The verified protest guidance for this county is: January 2 through March 2, 2026 is Nassau County's ARC filing period for the 2027/28 assessment; April 30, 2027 is the judicial-review petition deadline. The county's 2026/27 filing period was January 2–March 3, 2025. If the language is not a specific calendar date, contact the office promptly for the current notice and board-review schedule.