62,395 North Hempstead residential homeowners can file a property tax grievance each year. You file with Nassau County's Assessment Review Commission (centralized for all Nassau towns). Current deadline: March 31, 2026.
Even though your home is in the Town of North Hempstead, your property tax grievance is filed with Nassau County's centralized Assessment Review Commission (ARC), not with the town. This is unique to Nassau — every Nassau homeowner uses the same county-level filing body.
You file Form AR1 (residential) or AR2 (commercial) either through the ARC online portal (AROW) or by mail. The current filing window covers the 2027/28 tax year — meaning a successful reduction will first show up on your October 2026 school tax bill.
The full process is identical to every other Nassau town. See our complete Nassau County grievance guide for the step-by-step.
The most persuasive evidence in any LI grievance:
Use the live Town of North Hempstead property data to see median home values and how your assessment compares to neighbors.
March 31, 2026. Filing window opens early January 2026.
With the Nassau County Assessment Review Commission. The online portal (AROW) is the fastest path; you can also mail Form AR1.
Yes. There is no limit on how often you can grieve. Nassau reassesses every year, so most LI homeowners file annually as a maintenance step. Grievance firms recommend it because the worst case is no change.
Typical successful reductions are 5-15% of assessed value, which translates to roughly that same percentage off your annual bill. Real numbers depend on your starting assessment and how much over-assessment you can prove.
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Estimates and educational content only — not legal, tax, or financial advice. Verify with your county or town receiver, an attorney, or a CPA before making financial decisions.