Nassau County Tax Grievance Deadlines: What Homeowners Need to Know

If you’re a Nassau County homeowner, you already know property taxes can feel overwhelming. The good news is that Nassau County gives you the opportunity to challenge your assessed value each year— but only if you file your tax grievance on time. Missing the deadline means waiting an entire year for another chance.

Here’s a clear, homeowner-friendly guide to help you stay ahead of the calendar.

When Is the Nassau County Tax Grievance Deadline?

Nassau County’s grievance period typically runs from early January through early March. Each year the county sets a specific cutoff, and once that window closes, no late filings are accepted.

For most years, the deadline falls in the first week of March. Because the window is short and strict, I recommend marking your calendar as soon as the dates are announced.

Why the Deadline Matters

Your property taxes are based on the county’s estimate of your home’s market value. If the county overvalues your property, you may be paying hundreds—or even thousands—more than necessary.

Filing a grievance allows you to challenge that assessment. But if the deadline passes, you’re locked into the current value until the next cycle.

What You Need to File

The grievance process typically requires:

• Your property’s address and parcel information
• Your current assessed value
• Evidence that your home is overvalued (recent sales, comparable homes, or an appraisal)

A lawyer or licensed representative can handle the paperwork, research, and negotiations for you—often on a flat fee or contingency-style basis. My office generally offers a simple, affordable fee for most homeowners.

Should You File a Grievance?

Because Nassau County reassesses properties annually, you don’t need to prove your taxes went up—you simply need to show that the county’s valuation is higher than your home’s actual market value.

Common reasons to file:

• Your assessment increased significantly this year
• Your home’s market value has dropped
• Comparable homes in your neighborhood are valued lower
• Your property has condition issues that reduce value

What Happens After You File?

Once your grievance is submitted, the Assessment Review Commission (ARC) reviews your claim. In some cases, the process moves on to a Small Claims Assessment Review (SCAR) if additional appeal steps are needed. Most homeowners never need to appear personally—your representative typically handles everything.

Don’t Wait Until the Last Minute

Because the Nassau County window is short and interest is high, it’s smart to get started early. Preparing comparables, gathering documents, and submitting forms takes time—and many homeowners are surprised by how quickly early March arrives.

Need Help with Your Tax Grievance?

My office works with Nassau County homeowners every year to help them challenge their assessments efficiently and affordably. If you’re unsure whether your home is overvalued—or you’d simply rather have someone handle the process for you—I’m happy to review your situation and offer straightforward guidance.

Contact the Law Offices of Laurence Rogers
Valley Stream, NY • 516-253-4230
lrogerslawfirm.com

Experience you trust. Attention you deserve.