How to Grieve Your Property Taxes on Long Island
How do I grieve my property taxes on Long Island?
Grieving your property taxes means formally challenging your home's assessed value, not the tax rate itself, on the theory that it's set too high. The process runs through your town assessor's office in Suffolk County, or through the Assessment Review Commission (ARC) in Nassau County, and both have a narrow annual filing window that has to be checked each year rather than assumed.
Assessment vs. Tax Rate: What You're Actually Challenging
Your property tax bill is the product of two numbers: your assessed value and the tax rate set by your school district, town, county, and any special districts. Grieving addresses only the first number — the assessed value the town or county has placed on your property, not the rate itself. Even a successful grievance that lowers your assessment doesn't control what happens to the tax rate, which is set separately through budget processes.
Suffolk County: Town by Town
Suffolk County doesn't run a single, county-wide assessment system. Each of the ten towns maintains its own assessment roll and its own Board of Assessment Review (BAR), which hears grievances filed by property owners in that town. The filing window — commonly called Grievance Day — and the specific procedures can differ from one town to the next, so the process has to be confirmed with the individual town assessor's office rather than assumed to match a neighboring town.
Nassau County: A Countywide System
Nassau County works differently. Assessments are handled countywide by the Nassau County Department of Assessment, and the initial administrative challenge goes through the Assessment Review Commission (ARC) rather than an individual town board. Nassau also runs on its own annual filing calendar, separate from the town-by-town deadlines used in Suffolk.
The Narrow Filing Window
Both systems share one thing: a limited window to file each year. Miss it, and the usual result is waiting until the next assessment cycle — there generally isn't a way to file late for the current year's roll. Because the exact dates shift and vary by town in Suffolk, and because Nassau runs its own calendar, the filing deadline needs to be confirmed directly with the relevant office each year rather than relied on from memory or a prior year.
What You Need to File
A grievance generally needs to show that the assessed value doesn't reflect the property's actual market value — supported by evidence like comparable sales of similar nearby homes, a recent purchase price if the home was bought recently, an independent appraisal, or documentation of a factual error on the property record, such as incorrect square footage.
After You File
The town's Board of Assessment Review in Suffolk, or ARC in Nassau, reviews the evidence and issues a determination — the assessment can be reduced, left unchanged, or in some cases adjusted based on what's submitted. For owner-occupied one-to-three-family homes, a further administrative review through Small Claims Assessment Review (SCAR) is generally available if the initial result isn't satisfactory.
When it is worth a call
- You're not sure which system — Suffolk's town process or Nassau's ARC — applies to your property
- The filing window for your town is approaching and you want your evidence organized
- Your initial grievance was denied and you're considering a SCAR petition
- You believe your property record contains a factual error affecting your assessment
Common questions
- Is there a fee to file a grievance?
- Filing an initial grievance with a town Board of Assessment Review in Suffolk, or with ARC in Nassau, generally doesn't carry a filing fee. A later SCAR petition does have a modest, state-set filing fee.
- Can I grieve my taxes every year?
- Yes, there's generally no rule against filing in consecutive years if you believe the assessment remains too high, though each year requires its own filing within that year's window.
- Do I need to hire someone to grieve my assessment?
- No, a property owner can file a grievance directly. Whether to get help often comes down to how comfortable you are gathering and presenting comparable sales evidence.
- What if I just bought my home for less than the assessed value implies?
- A recent arm's-length purchase price can be relevant evidence, though it's one factor among several an assessor or review board will look at, not an automatic basis for a reduction.
Talk it through with Mitch
Bring the situation, not a diagnosis. A short conversation usually makes the next step obvious.