Does It Cost Anything to Grieve Your Property Taxes in Nassau County?

In 2025, Nassau County homeowners who won assessment reductions saved a combined $387.2 million, according to our 2025 Nassau County grievance study. That is real money returned to people who filed a grievance.

At Ownwell, we hear one question more than any other: does it cost anything to challenge your tax bill? The short answer is no.

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Key Takeaways

• Filing a grievance with Nassau County's Assessment Review Commission (ARC) is free: no fee to challenge your assessment.

• The only government fee is $30 if you move to Small Claims Assessment Review (SCAR) after an ARC denial.

• A grievance can only lower or hold your assessment; it can never raise it.

• We charge a flat 25% of first-year savings in New York, while many Nassau firms charge 40%-50%.

• Nassau homeowners who won reductions with the Assessment Review Commission (ARC) in 2025 saved a combined $387.2 million.

What Does It Cost to Grieve Your Property Taxes in Nassau County?

Filing a Nassau County assessment challenge yourself costs nothing. There is no fee to file with the Assessment Review Commission (ARC), which means there is no cost to grieve an assessment on your own.

A grievance is a formal request to lower your home's assessed value, the dollar figure the county uses to calculate your bill. Every owner has the right to file one. You _do not_ need a lawyer, and you owe the county nothing to submit your case.

Cost enters in only two ways after that free filing:

1. A $30 fee if you take an ARC denial to Small Claims Assessment Review (SCAR).

2. A contingency fee if you choose to hire a professional.

Both costs are optional, so you control whether you ever pay a cent. Grieving is also low-risk by design: ARC may only confirm your current value or reduce it, never raise it.

That is exactly why Nassau homeowners file even though the process is free: there is upside and no downside. Here is the full cost picture at a glance:

So the filing itself carries no price tag. Your choices afterward decide whether you spend anything.

Want the step-by-step process? See our guide on how to file a Nassau County grievance, or start one now through Ownwell's appeals service.

Why So Many Nassau Homeowners Grieve Anyway

Long Island homeowners treat grieving as routine, and the data backs them up. Our Long Island Homeowner Survey found that 62% of Long Island homeowners have filed a property tax grievance, nearly triple the national rate of 22%.

That habit is rooted in frustration. In the same survey, 93% agree the system penalizes those who do not file. Staying silent often means paying more than your neighbors do on a similar home.

The rest of the country behaves very differently. Bankrate reports that only 3% to 5% of homeowners file an appeal, citing the National Taxpayers Union.

Why the huge gap? Nassau assessments tend to run high, and the filing is free. When a challenge costs nothing and can lower your bill, filing becomes the standard defensive move here.

There is also a fairness angle. A value set too high tends to stay too high until someone pushes back. Filing keeps homeowners honest.

The stakes are high in New York. The state ranks second in the nation for average annual real estate taxes. That is $7,659 a year versus $4,334 nationally, per state tax data.

What You Could Save (and Why the Free Filing Pays Off)

The payoff is measurable. Our 2025 Nassau County grievance study found that 224,983 residential properties (57%) won an ARC reduction in 2025. Together they saved $387.2 million in property taxes, and the average winning reduction was $111,021 in market value.

In that study, more than half of the homes that challenged their value won a lower one. The typical winner did not shave off a token amount; it was six figures of market value.

Here is one example, using Nassau's median effective tax rate of 0.71% on a $650,000 home cut 15%:

Your own numbers will differ, but the pattern holds: a lower assessed value means a smaller bill. The reduced value also becomes the baseline for future bills. Held for five years, that $692 example adds up to roughly $3,460 kept in your pocket.

Timing matters, too. Waiting until the deadline leaves less time to gather the comparable sales that win reductions. For 2026 the deadline was March 1, and the 2027 date is expected around the same time, so filing early protects both your savings and your evidence.

See your Savings Estimate: enter your address to get started.

DIY vs. Hiring a Professional: The Real Cost Tradeoff

The choice comes down to time versus a share of your savings. Doing it yourself costs $0 in fees. The tradeoff is your time: expect five to 10 hours of work.

That work means pulling comparable sales, completing Form AR1, and handling the ARC process. If ARC denies you, you also manage the SCAR step yourself.

Hiring a professional flips the equation. There is no upfront cost. You pay a contingency percentage of your first-year savings, and only if your bill drops.

Fees vary widely, so it pays to compare. One independent guide, The Property Tax Desk, notes that Nassau firms often charge 40% to 50% of your first-year savings. That is higher than the 25%-35% norm charged nationally, per the same guide.

Here is how the two paths compare:

The percentage matters more than people expect. On the same reduction, a lower contingency rate leaves more money in your pocket. That is why we charge a flat 25% in New York.

A grievance is not your only lever, either. Exemptions can lower your bill too, as we cover on our Nassau tax-relief exemptions page. For a deeper cost breakdown, read our DIY vs. professional comparison.

The One Government Fee: The $30 SCAR Filing Fee

The initial ARC grievance is free. The only government fee appears later, and only if you keep going.

If ARC denies your grievance, you can seek Small Claims Assessment Review under New York Real Property Tax Law § 730. That review carries a $30 filing fee and does not require an attorney.

SCAR is not for everyone. It is open to owner-occupied one- to three-family homes and Class 1 condos. You must file within 30 days after the final assessment roll is filed, so the timing is tight.

The setting is deliberately simple. Because no attorney is required, homeowners can present their own case. The $30 covers the government's entire cost for that second look.

There is a helpful catch here, too. We cover the $30 SCAR fee for you while many representatives or other companies do not.

Under New York Real Property Tax Law (RPTL) § 733, you also get the $30 back if the hearing officer grants at least half of the reduction you requested. So even the one real government charge often ends up costing you nothing.

Unique Deadlines (No Extra Cost, But Costly to Miss)

The deadline carries no fee, but missing it is expensive. The filing window opens in early January.

For 2026, the statutory deadline was March 1, and the 2027 deadline is expected around the same date. If March 1 lands on a weekend, it moves to the next business day.

Some years the county has extended the window into late March. Those extensions are discretionary, so never assume one. Always confirm the current date with the Nassau County Assessment Review Commission.

Watch for one common trap. A home inside an incorporated village, such as Rockville Centre or Garden City, may need a separate village grievance with its own earlier deadline.

Miss the deadline, and you forfeit the challenge for the entire year. In our example, that is roughly $692 in first-year savings left on the table, plus the compounding you'd miss. Adding the March 1 window to your calendar protects that amount.

Use Ownwell to File Your Nassau County Grievance

We take the work off your plate. We handle the full ARC process on contingency, with no upfront cost and a flat 25% of first-year savings in New York. Our Savings-Or-Free Guarantee means you pay nothing if your taxes don't drop, as shown in Ownwell's transparent pricing.

We also cover the $30 SCAR fee and almost always escalate your grievance if ARC denies it. You never pull comps, complete a form, track a court deadline, or appear in person.

Our track record is concrete. Our Nassau customers save an average of $1,462 per year. We hold a 93% success rate in Nassau County and a 4.7-star rating across more than 3,000 Google reviews.

Start by sharing your address, and we review whether a reduction is likely before you commit. We also handle commercial and investment properties across Long Island.

Start your Nassau County grievance with zero upfront cost.

Frequently Asked Questions

Does it cost anything to grieve your property taxes in Nassau County?

No. Filing a grievance with ARC is free, and ARC can only hold or lower your assessment. The only real risk is missing the deadline; for 2026, it was March 1, and the 2027 date is expected around the same time.

Is there a fee to file a grievance with the Nassau County Assessment Review Commission?

There is no fee to file your grievance with ARC. Most homeowners never reach the only government charge, the $30 SCAR fee, because ARC resolves many cases first.

How much do Nassau County tax grievance companies charge?

Nassau firms often charge 40%-50% of your first-year savings, per The Property Tax Desk, paid only if you win. We charge a flat 25% of first-year savings in New York, with no upfront cost.

What is the $30 fee for a Nassau property tax grievance?

The $30 is the court filing fee for Small Claims Assessment Review, which you reach only if you seek SCAR review after an ARC denial. Many representatives, including us, cover it for you.

Can filing a grievance raise my Nassau County property taxes?

No. ARC can only confirm your current assessed value or reduce it, so filing can never raise your taxes.