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Paying more than your neighbors?

We put your County value next to similar homes nearby and forecast your next bill. Free, no account.

We have records for every town and city in Nassau County.

  • Filing can’t raise your assessment
  • Filing opens January 4, 2027. All dates

Oyster Bay - East Norwich: 35 homes that sold recently

County value as a share of each sale price, 2028 tentative roll

At the same $1.1M price, that’s a County value of $476k for one home and $891k for another.

See Oyster Bay - East Norwich’s homes on the map

See next year’s bill before it arrives.

We forecast your next bill if you do nothing and if you grieve, and we checked the forecast against 729 real County bills.

Forecast my bill

Example home, 2027 bill

See how your area compares.

Typical values, taxes, and a map of every home, for each school district, hamlet, and village we cover.

School districts

Which districts are assessed least evenly All 69 school districts, hamlets, and the county map

How a tax grievance works

  1. Meet your assessment

    Find the value the County gave your home. That’s what a grievance questions.

  2. Give it a second look

    Compare it with recent sales of similar homes.

  3. Make your next move

    If it looks high, appeal during the County’s filing window.

One flat $200 fee, and any savings are yours.

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Good Grieves fee

Service fee
$200
Percentage of your savings
$0
Total
$200

Nothing to pay if there’s no reduction. Savings aren’t guaranteed. Compare fees

What if your bill were 10% lower?

$15,000/ year
$5,000$40,000
If your bill were 10% lower
$1,500per year
Our flat service fee, once
$200
What you’d keep in year one
$1,300

Illustrative annual savings, less one $200 service fee. Not an estimate or promise. Actual savings depend on your assessment, exemptions, and tax rates.

Questions people ask first

More answers from Nassau County
What does it mean to “grieve” my taxes?
You ask Nassau County’s Assessment Review Commission (ARC) to review your home’s assessed value, not the tax rate. Read how the process works →
Could ARC raise my assessment if I appeal?
No. ARC either lowers your assessment or leaves it unchanged. Tax rates can still change your bill. Read about the risks and costs →
Does buying a home raise its assessment?
No. New York doesn’t allow reassessing a home because it sold, so a buyer keeps the County’s value. The seller’s exemptions end at closing, though, so the bill can still go up. Read the guide for recent buyers →
When can I file a grievance?
The next published ARC filing window is January 4–March 1, 2027, for the 2028–29 assessment year. See every date in the cycle →
How much does Good Grieves cost?
A flat $200, with no percentage of your savings. A reduction isn’t guaranteed. Compare flat and percentage fees →
Can I do this myself?
Yes. Filing with ARC is free, and you don’t need an attorney. Nassau County’s filing instructions ↗