Save Money on Nassau County Property Taxes
67% of Nassau County homeowners are over-assessed. Check yours for free and generate your grievance evidence in 5 minutes.
Nassau County, NY · Try address or use SBL
Median annual tax bill in Nassau County
Homeowners over-assessed
Average annual savings from grievance
To generate your evidence with AI
Why Homeowners Choose LowerMyLevy
Professional-grade grievance tools without the professional-grade fees.
Keep 100% of Savings
Tax firms take 50% of first-year savings. With LowerMyLevy, every dollar saved is yours.
AI-Powered Analysis
Advanced modeling finds the best comparable sales and calculates your true market value instantly.
Complete Packet
Pre-filled AR1 form, Evidence Brief, and supporting data — ready to print, sign, and submit.
Zero Risk
Your assessment cannot increase from filing a grievance. There are only two outcomes: savings or no change.
Nassau County Grievance Timeline
Key dates and milestones from assessment release to savings on your tax bill.
Tentative Assessments Released
Nassau County Department of Assessment publishes 2027/28 tentative property values. This is your first chance to review your assessment and spot overvaluation.
Grievance Filing Period Opens
Property owners can officially begin filing grievances to challenge their tentative assessments. This is also the deadline for exemption applications (STAR, Veterans, Senior, Disability).
Analyze & Prepare with LowerMyLevy
Use LowerMyLevy to look up your assessment, find the best comparable sales, and generate your AI-powered Evidence Brief and pre-filled AR1 form — all in about 5 minutes.
Filing Deadline
Last day to file your 2027/28 grievance with the Assessment Review Commission (ARC). Missing this date means waiting until next year.
Assessment Rolls Finalized
ARC reviews all grievances. If your grievance is approved, your reduced assessment will be reflected starting with the October 2027 School Tax bill.
Small Claims Assessment Review (SCAR)
If ARC denies your grievance, you can file a SCAR petition in Nassau County Supreme Court within 30 days of the final assessment roll. Your assessment cannot increase as a result of filing.
Savings Reflected
Once your assessment is lowered, savings appear as reduced tax bills starting with the October 2027 School Tax and ending with the January 2028 General Tax bill.
Important Dates for Nassau County
Filing a grievance is always beneficial
There are only two possible results of filing a Nassau County tax grievance: your assessment will be reduced or remain the same. Your assessment cannot be increased as a result of a grievance for that year.
Frequently Asked Questions
Everything you need to know about filing a property tax grievance in Nassau County.
Ready to lower your Nassau County levy?
The deadline for filing is March 31, 2026. Check your assessment for free — no sign-up required.