Property Tax Grievances

Lower Your Nassau County Property Taxes Through a Property Tax Grievance

If you own a home or commercial property in Nassau County, New York, you have the legal right to challenge the assessed value of your property if you believe it is inaccurate or higher than its fair market value. Filing a property tax grievance can lead to meaningful tax savings—sometimes hundreds or even thousands of dollars per year.

What Is a Property Tax Grievance?

A property tax grievance is a formal appeal asking the Nassau County Assessment Review Commission (ARC) to review and potentially reduce your property’s assessed value. Because property taxes are based on assessment amounts, a successful grievance can directly lower your tax bill.

You may have grounds for an appeal if:

• Your assessment is higher than your property’s current market value
• Comparable homes in your neighborhood are assessed for less
• Your property has condition issues that weren’t fully considered
• Your assessment increased despite no major improvements
  

Important Nassau County Grievance Deadline

Grievance filing deadline: March 2 (every year).

All Nassau County property tax grievances must be filed on or before March 2. Missing this deadline means waiting an entire year for another opportunity, so acting early is critical.

How the Nassau County Grievance Process Works

• Assessment Review: Your current assessed value is analyzed and compared to  recent local sales and similar properties.
  

• Evidence Preparation: Supporting documentation—such as comparable sales, photos, and property details—is compiled.

• Filing with ARC: The grievance is submitted to the Nassau County Assessment Review Commission by the March 2 deadline.

• County Review & Decision: ARC evaluates the appeal and issues a determination, typically later in the year. If your grievance is approved, your property taxes are adjusted accordingly.

Residential & Commercial Property Owners Welcome

Both homeowners and commercial property owners in Nassau County can file grievances, including:

• Single-family homes
• Condominiums and co-ops
• Multi-family properties
• Retail, office, and industrial buildings

The potential savings vary, but many property owners benefit annually from filing.

Why File a Property Tax Grievance?

• Reduce annual property tax bills
• Correct inaccurate assessments
• Ensure fair treatment compared to similar properties
• No downside—your taxes cannot increase due to filing

Nassau County assessments do not always automatically reflect market conditions, making regular reviews essential.

Get Help With Your Nassau County Property Tax Grievance

The grievance process involves strict deadlines, detailed valuation analysis, and proper documentation. Working with a professional can improve accuracy, save time, and increase the likelihood of a successful reduction.

If you believe your Nassau County property taxes are too high, now is the time to review your assessment and take action before March 2.

Start your Nassau County property tax grievance today and make sure you’re not paying more than your fair share.