Nassau County Property Tax Grievance — New York

Rob Hartley·Updated February 15, 2026

Nassau County, not the Town of Hempstead, is responsible for setting your property tax assessment, the basis of your property taxes. There are approximately 416,000 parcels of land in Nassau County. With a median home value of $487,900, Nassau County has a median property tax of $8,711 per year, making it one of the highest median property taxes in the United States, and is ranked 2nd of the 3143 counties in order of median property taxes. The average yearly property tax paid by Nassau County residents amounts to about 8.26% of their yearly income.

Notable cities: Mineola, Hempstead, Garden City, Freeport, Long Beach

Median Home

$487,900

Tax Rate

1.79%

Annual Tax

$8,711

Population

1.4 million

2026 Grievance Deadline: March 2, 2026

Appeals must be filed between January 2, 2026, and March 2, 2026. Mail must be postmarked by the USPS no later than March 2, 2026.

Property in Nassau County, New York — local tax assessment and grievance guide

How Nassau County Assesses Property

100%of market value

Assessed by: Nassau County Department of Assessment

Assessment cycle: annual

Notices typically mailed: January

In Nassau County, properties are assessed at 100% of their market value. This means that if your home's market value is $487,900, your assessed value would also be $487,900. With Nassau County's average effective tax rate of 1.79%, this would result in approximately $8,733 in annual property taxes.

The Grievance Process

Appeals are heard by the Board of Assessment Review. At the SCAR hearing, individuals or their representatives may present evidence of unequal or excessive assessment to a SCAR hearing officer.

Check your assessment notice on the Nassau County Department of Assessment site once it's published January 2

Compare your assessed market value with recent sale prices of similar homes in your neighborhood

File a grievance through the Assessment Review Commission (ARC) online between January 2 and March 1, 2026

Track your case and wait for the ARC's determination

If not satisfied with ARC's decision, file a Small Claims Assessment Review (SCAR) Petition in Nassau County Clerk's Office

Required form: Form RP-524, Complaint on Real Property Assessment

Filing Methods

online:File online through AROW (Assessment Review on the Web)

mail:Assessment Review Commission at 240 Old Country Road, 5th Floor, Mineola, NY 11501

in-person:Assessment Review Commission, 240 Old Country Road, 5th Floor, Mineola, NY 11501. Hours are from 9 am to 4:30 pm, Monday to Friday, except holidays.

Evidence to Bring

Comparable sales dataProperty photosRepair estimates/documentation

Nassau County Assessor Contact

Nassau County Department of Assessment

Phone: ((516) 571-1500

Address: 240 Old Country Road, 4th Floor, Mineola, NY 11501

Website: https://www.nassaucountyny.gov/1501/Assessment

Online Portal: https://www.nassaucountyny.gov/2207/How-to-Appeal-Your-Assessment

Hours: Monday – Friday, 8 am - 4:30 pm

Tax Exemptions in Nassau County

STAR (School Tax Relief)

Varies based on assessment

Available to homeowners using the property as their primary residence, with an income limit $500,000

Eligibility: Primary residence owners with income under $500,000Deadline: Must register with NYS Department of Taxation and Finance

Enhanced STAR

Higher benefit than Basic STAR

Available to seniors aged 65 and older with an income of $110,750 or less

Eligibility: Seniors aged 65+ with income of $110,750 or lessDeadline: Register with NYS; automatic upgrade from Basic STAR if eligible

Senior Citizens Property Tax Exemption

Between 5% and 50% reduction on school, county, and town taxes

Tax relief to eligible homeowners aged 65 or older with an income of $58,399 or less

Eligibility: Age 65+ with income of $58,399 or less; 50% exemption for income $50,000 or lessDeadline: January 2

Veterans Exemption

Up to 15% reduction, with additional 10% for combat service

Reduction in County, Town, Village, and Highway components of property tax bills

Eligibility: Honorably discharged veterans; varies by disability levelDeadline: Contact assessor's office

Volunteer Firefighters/Ambulance Workers

10% exemption on the property's assessed value

For active volunteer firefighters and ambulance workers with at least two years of service

Eligibility: Active volunteers with 2+ years service; primary residence in jurisdiction servedDeadline: Contact assessor's office

Official Resources

Nassau County Department of Assessment →

Official Nassau County assessment information, exemption forms, and property search tools

Nassau County Land Record Viewer →

Access to assessment roll data, district information, tax maps, property photographs, past taxes, tax rates, exemptions with amounts and comparable sales

Nassau County How to Appeal Your Assessment →

Step-by-step guide for filing property tax grievances online through AROW system

New York State Department of Taxation - Property Tax Information →

State-level property tax resources, forms, exemption information, and grievance procedures

Check Your Nassau County Assessment

Enter your address to see if your Nassau County property is overassessed.

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Frequently Asked Questions

What is the deadline to grieve my property taxes in Nassau County?

The deadline to file a property tax grievance in Nassau County is March 2, 2026. The filing period opens on January 2, 2026, and you must file your grievance between these dates. If mailing your application, it must be postmarked by the USPS no later than March 2, 2026. If you miss the ARC deadline, you generally cannot challenge that year's assessment, regardless of merit, even if you had a valid excuse for not filing timely.

How do I file a property tax grievance in Nassau County online?

You can file online through AROW (Assessment Review on the Web) between January 2, 2026, and March 2, 2026. You may file an online appeal for any type of property, including commercial property, and any type of claim. You are not required to use an attorney. Successful transmissions generate an appeal number immediately, and an email message after a short delay. There is no fee to file with ARC.

What happens at a Nassau County Assessment Review Commission hearing?

The Assessment Review Commission may reduce your assessment as appropriate. The Assessment Review Commission will never increase the assessment. The county reviews all filings and often issues decisions later in the year. If the owner is successful, the assessment and hopefully the future tax bill will be reduced. If you're not satisfied with ARC's decision, you can file a Small Claims Assessment Review (SCAR) Petition where you may present evidence of unequal or excessive assessment to a SCAR hearing officer.

How much can I save by grieving my property taxes in Nassau County?

With Nassau County's median property tax of $8,711 per year on a home worth $487,900, even a modest reduction in your assessed value can save hundreds or thousands annually. Since assessments form the basis for property taxes, even a modest reduction in assessed value can save hundreds or thousands annually over multiple years. Over three-quarters of homeowners who challenged their 2024/25 assessments received reductions. The exact savings depend on the percentage reduction achieved.

What evidence do I need for a Nassau County property tax grievance?

You need to confirm whether your assessed market value aligns with recent sale prices by comparing similar homes in your neighborhood. Your estimate of the market value should be based on your property's value as of the valuation date, which is July 1 of the prior year in most municipalities. Evidence typically includes comparable sales data, property photos showing condition issues, repair estimates or documentation of needed repairs, and any other documentation that supports your claim that the property is overassessed.

Can filing a grievance increase my property taxes in Nassau County?

The Assessment Review Commission will never increase the assessment. Your assessment cannot be increased as a result of a grievance for that year. In New York State, your assessment can never be increased as a result of filing a grievance. That means there's zero risk—just the potential for property tax savings. There are only two possible results of filing a Nassau County, Long Island tax grievance: your assessment will be reduced or it will remain the same.

What is the SCAR process in Nassau County?

Owners who are not satisfied with the Assessment Review Commission's decision have the right to file an appeal called a Small Claims Assessment Review (SCAR) Petition in the Nassau County Clerk's Office to seek further review of their assessment. A filing fee of $30 applies but may be reimbursed by the county if there is a successful outcome. Forms and instructions are available online or at the Nassau County Clerk's Office located at 240 Old Country Road Room 108, Mineola, NY 11501. SCAR Petitions filed against the County of Nassau should typically be filed in April of the year following the one in which the grievance was instituted.

Do I need to file a grievance every year in Nassau County?

Even if your assessment seems low, we strongly recommend filing a tax grievance on a yearly basis. Why? Because the School and General Tax rates are continuing to rise. If you do not file a grievance, you have no way to protect yourself from the consistently increasing tax rates. If you allow your assessment to remain the same and do not protest, your property taxes will likely increase due to rising School and General tax rates. Property assessments change yearly, and if you don't challenge yours, your tax burden could creep back up. Each grievance is a course correction, helping to ensure your home's assessed value accurately reflects market conditions.

For state-wide grievance information including New York's assessment ratio and deadlines, see our New York Property Tax Grievance Guide →

Considering professional help with your grievance? Compare pricing, coverage, and pros/cons in our Best Property Tax Grievance Services (2026) or browse side-by-side service comparisons →

More New York Counties

Bronx County (Bronx)Erie County (Buffalo)Kings County (Brooklyn)New York County (New York City (Manhattan))Queens County (Long Island City)Suffolk County (Babylon)

← All New York property tax grievance info

Sources: https://www.nassaucountyny.gov/2207/How-to-Appeal-Your-Assessment | https://www.tax-rates.org/new_york/nassau_county_property_tax | https://www.nassaucountyny.gov/1501/Assessment | https://www.nassaucountyny.gov/3575/Exemption-Forms

Last verified: 2026-02-15