New York Property Tax Grievance Deadlines & Filing Calendar

Know the Deadline or Lose the Right to Challenge Your Assessment


In New York, property tax grievance deadlines are strictly enforced. Missing a filing date almost always means losing the right to challenge your assessment for that tax year, even if the value is clearly excessive.


Since deadlines vary by county, town, village, and city, understanding when and where to file is just as important as understanding how to file. Below is a clear, practical overview of property tax grievance deadlines across Nassau County, Suffolk County, and New York City.


Suffolk County Property Tax Grievance Deadlines (By Town)


In Suffolk County, grievances are filed at the town level; the ten Suffolk County towns and their respective filing periods are as follows:



Nassau County Property Tax Grievance Deadline


In Nassau County, property tax grievances are handled by the Assessment Review Commission (ARC).


Key points:

  • The Nassau County filing period typically opens on January 2nd.
  • Grievances must be filed during the official ARC window.
  • Filings are submitted electronically through ARC’s online system.
  • The deadline is usually scheduled for March 1st.


If you miss the ARC deadline, you generally cannot challenge that year’s assessment, regardless of merit, even if you had a valid excuse for not filing timely.


Village Property Tax Grievance Deadlines (Critical and Often Missed)

If your property is located within an incorporated village, you may be subject to a separate village assessment with a separate and often times, earlier grievance deadline.


Village deadlines are often earlier than town deadlines, are similarly strictly enforced, and are one of the most commonly missed filing opportunities. Missing a village grievance deadline typically means paying that portion of the tax without recourse for the year.


New York City Property Tax Grievance Deadlines

New York City uses a different system, with grievance deadlines based on property classification, not geography.


General guidelines:

  • Class 1 properties (most one- to three-family homes) have later deadlines, usually March 15th.
  • Larger residential and commercial properties have earlier filing dates, usually March 1st.
  • Filings are made with the NYC Tax Commission.


Because NYC deadlines vary by class and valuation thresholds, filing requirements should be reviewed carefully each year.


SCAR Filing Deadlines (Small Claims Assessment Review)

A SCAR proceeding is available only for certain owner-occupied residential properties.


Important notes:

  • SCAR is a court proceeding, not an administrative grievance.
  • Eligibility is limited by property type and use.
  • SCAR deadlines run separately from grievance deadlines.
  • SCAR Petitions filed against the Suffolk County towns must be filed in July of the same year in which the grievance was filed, except for Huntington where the SCAR Petition should be filed usually between September 15th and October 15th.
  • SCAR Petitions filed against the County of Nassau should typically be filed in April of the year following the one in which the grievance was instituted.
  • Village and City SCAR deadlines vary; contact us today for confirmation of when your deadline is.


Filing a grievance is still a required prerequisite before pursuing SCAR relief.


Article 7 Tax Certiorari Deadlines

An Article 7 tax certiorari proceeding is filed in New York Supreme Court after the grievance stage.


Key timing considerations:

  • Article 7 petitions must be filed within a short statutory window after the final assessment roll, and are generally required to be filed during the same time in which SCAR petitions can be filed.
  • Missing the Article 7 deadline generally bars judicial review for that tax year.
  • Article 7 proceedings often involve multi-year litigation and expert valuation evidence.


Because deadlines are unforgiving, Article 7 filings should be evaluated promptly after grievance determinations are issued.


Why Waiting for the Tax Bill Is Often Too Late

One of the most common mistakes property owners make is waiting until after tax bills are issued to take action. By that point grievance deadlines have usually passed, assessments are already final, and options for relief are limited or nonexistent. The grievance process is driven by assessment roll dates, not billing dates.


How an Attorney Helps Navigate Filing Deadlines

Tracking grievance deadlines across counties, towns, villages, and property classes is not intuitive. An experienced tax grievance attorney monitors filing calendars annually, identifies all applicable deadlines for a given property, ensures filings are timely and properly submitted, and preserves the right to judicial review when necessary.


Since a missed deadline cannot be fixed retroactively, timing is often the difference between paying too much and securing relief.


Request a Free Deadline Review

If you are unsure which property tax grievance deadlines apply to your property, we offer a free, no-obligation review. Our attorneys will confirm where your grievance must be filed, the applicable deadline, and whether filing makes financial sense.


Acting early is the best way to preserve your rights.