Clarkstown homeowners can challenge the assessed value behind the property tax bill on Grievance Day. Here is exactly what the 2026 window looks like.
Yes. A Clarkstown homeowner can challenge the assessed value behind the property tax bill on Grievance Day, which falls on Tuesday, May 26, 2026 for the 2026 roll. The bill itself is not what gets contested. The assessed value the town uses to compute it is the appealable piece, and the school-district line is usually where the case lives.
What does fighting a Clarkstown tax bill actually mean?
Under New York Real Property Tax Law, every homeowner can file a grievance form with the Clarkstown Board of Assessment Review on or before Grievance Day. The Board hears the case, looks at the evidence, and issues a written determination. If the Board does not grant relief, the next step is a Small Claims Assessment Review proceeding, with rules and timing set separately by the county.
What is worth doing first?
Inside Clarkstown the school-district line is usually the part of the case that does the most work. When the assessed value does not square with what local market sales in the same district would support, the homeowner is paying the high-rate side on a value the local market does not actually carry. Fair Appeal handles the full property tax appeal at the Clarkstown Board of Assessment Review and only charges a percentage of first-year tax savings when the value comes down. FairAppeal monitors the Clarkstown roll every year, not just once. For the full Clarkstown picture see the Clarkstown property tax appeal guide or the NYS contesting your assessment page.