New York has some of the highest property taxes in the nation — and one of the most complicated appeal systems. Whether you own a co-op in Manhattan, a house on Long Island, or a rental property upstate, understanding how to challenge your assessment can save you thousands every year. This guide breaks it all down.
How New York Property Taxes Work
New York assesses properties differently depending on where you are. New York City has its own system entirely, while the rest of the state follows general state law with local variations.
In New York City, properties are divided into four classes: Class 1 (1-3 family homes), Class 2 (co-ops, condos, rentals), Class 3 (utilities), and Class 4 (commercial). Each class is taxed differently, with Class 1 homeowners receiving significant protections against rapid value increases.
Outside NYC, your local assessor sets a value each year, and your tax bill is calculated by multiplying your assessed value by the local tax rate — which varies enormously by county, school district, and municipality.
Filing Deadlines — New York is Strict
New York has hard deadlines and missing them means waiting a full year. Key dates:
- Outside NYC: Grievance Day is the fourth Tuesday in May in most jurisdictions — this is your deadline to file with the local Board of Assessment Review (BAR)
- New York City: The deadline to file a Tax Commission application is March 1 for most property classes (January 15 for Class 2 properties with 11+ units and Class 4)
- Nassau County: Has its own separate deadline — typically March 1 — and its own assessment review process through the Assessment Review Commission (ARC)
Check your specific municipality’s deadline every year — they can shift slightly. Never assume it’s the same as the prior year.
Step-by-Step: Appealing Outside New York City
Step 1: Review Your Assessment
Your assessment notice arrives in the mail, typically in late winter or early spring. Check your municipality’s website or the local assessor’s office for your current assessed value. Compare it to what similar homes in your neighborhood have sold for recently.
Step 2: File a Grievance with Your Local BAR
Complete Form RP-524 (Complaint on Real Property Assessment) and file it with your local Board of Assessment Review on or before Grievance Day. You do not need an attorney for this step. Bring your evidence — comparable sales, a recent appraisal, photos of condition issues.
Step 3: The BAR Hearing
The BAR will schedule a brief hearing — usually 5–10 minutes — where you present your case. They’ll review your evidence and issue a written decision, typically within a few weeks. Many valid appeals are resolved here.
Step 4: Small Claims Assessment Review (SCAR)
If the BAR denies your grievance, homeowners (Class 1 properties) can file a SCAR petition in State Supreme Court. Filing fee is $30. A hearing officer — typically a retired judge or attorney — reviews your case informally. SCAR is designed specifically for homeowners to navigate without a lawyer, and it’s where many successful appeals end up.
Step 5: Tax Certiorari (For Larger Properties)
For commercial properties, large apartment buildings, or cases where significant money is at stake, Tax Certiorari proceedings in Supreme Court are the path. These typically require an attorney and a licensed appraiser. The potential savings usually justify the cost for high-value properties.
Appealing in New York City
NYC property owners file with the Tax Commission (not a local BAR). The process:
- File an application with the NYC Tax Commission by March 1 (most classes)
- The Tax Commission reviews your application and may offer a settlement
- If no settlement, you get a hearing before a Tax Commission hearing officer
- If still unsatisfied, you can file a Tax Certiorari proceeding in Supreme Court
NYC Class 1 homeowners (1-3 family homes) can also use a simplified online application. Class 2 co-op and condo owners file through their building’s board, which files on behalf of all unit owners.
Nassau County — A Special Case
Nassau County has historically had some of the highest rates of assessment error in the state. It runs its own Assessment Review Commission (ARC) process with a March 1 deadline. Nassau has also been the subject of significant reform efforts — if you own property there, it is almost always worth filing an appeal. The county has a track record of settling cases at favorable rates.
Best Evidence for a New York Appeal
- Comparable sales (comps): Recent closed sales of similar properties within your neighborhood — your strongest argument at every level
- A licensed appraisal: Especially important for SCAR and Tax Certiorari proceedings — carries significant weight with hearing officers
- Condition issues: Photos, contractor estimates, inspection reports documenting defects not reflected in the assessment
- Inequity: If similar properties on your street are assessed lower, document it — New York law requires assessments to be uniform
More State Appeal Guides
- California Property Tax Appeal Guide
- Texas Property Tax Protest Guide
- Florida Property Tax Appeal Guide
- New York Property Tax Appeal Guide
- Illinois Property Tax Appeal Guide
Build a Winning Appeal Case
Our complete step-by-step guide covers evidence gathering, what to say at the hearing, and how to follow up if your first appeal is denied.
Read the Full Appeal Guide →