Property tax grievance · Nassau County, NY
Grieve your property taxes in Nassau County, NY.
Nassau County homeowners grieve through New York’s system: the town or city assessor sets the value and the Board of Assessment Review hears the case. Boards act on evidence of market value as of the assessment date, and a licensed, USPAP-compliant appraisal is that evidence.
$5, credited toward your appraisal.
Nassau County, NY
Home to Mineola
- Filing deadline
- On your notice
- Values your home
- Town or city assessor
- Hears your case
- Board of Assessment Review
- Desktop appraisal
- $225
- $5 check credited
- Timing
- Confirmed with your order
Deadline
Grievance Day is the 4th Tuesday in May in most towns, but it varies — Nassau, Suffolk, and the cities run their own calendars. NYC’s Tax Commission deadlines fall in March. Your assessment notice states the exact date.
Confirm your filing window and recipient requirements before ordering. Service availability and delivery depend on the property, evidence and appraiser. You remain responsible for filing on time.
How it works
How to grieve your property taxes in Nassau County.
- Step 1
Check your savings
Enter your address and pay $5. We check your Nassau County assessment against recent nearby sales.
- Step 2
Order the appraisal
A desktop appraisal valued as of your assessment date, with the $5 credited. Complex homes get one exact quote.
- Step 3
Show us your home
Walk through on your phone so the appraiser sees its condition. A desktop appraisal needs no visit.
- Step 4
File your grievance
A state-licensed NY appraiser signs it, with a cover letter and filing steps. You file by your deadline, and the Board of Assessment Review hears your case.
The evidence
Boards act on value, not frustration.
However New York labels the process, the case underneath is the same: show what your home was actually worth on the assessment date. A licensed, USPAP-compliant appraisal, with comparable sales, documented adjustments and a signed opinion of value, is that showing.
What the appraisal gives you
- Valued as of your assessment date, not today
- Comparable sales with adjustments and citations
- Signed by a state-licensed NY appraiser
- A phone walkthrough; a desktop appraisal needs no visit
- Starting search in Nassau County: 3+ comparable sales within ~1 mi, sold within 24 months
Search settings are starting points for the appraiser, not universal filing requirements. The appraiser selects appropriate evidence for the assignment.
Confirm before you file
- The recipient: Nassau County Assessment Review Commission
- The electronic filing format and required official forms
- Appraiser availability and delivery timing, before you order
The process
How New York handles grievances.
Outside New York City, you contest your assessment by filing a grievance (Form RP-524) with your town or city’s Board of Assessment Review, generally on or before Grievance Day. If the board doesn’t give you what the evidence supports, homeowners can continue to Small Claims Assessment Review (SCAR) for a $30 filing fee — a homeowner-friendly forum where a licensed appraisal is the classic winning exhibit. On Long Island, grievance filing is so common it’s practically an annual ritual, and Nassau County runs its own Assessment Review Commission with a distinct calendar.
Worth knowing in New York
New York towns assess at different fractions of market value (the equalization rate), so the number on your notice isn’t the market value claim itself — the grievance contests the implied market value. SCAR is available for owner-occupied one-to-three family homes.
FAQ
Nassau County questions
When is the Nassau County appeal deadline?
Grievance Day is the 4th Tuesday in May in most towns, but it varies — Nassau, Suffolk, and the cities run their own calendars. NYC’s Tax Commission deadlines fall in March. Confirm your exact filing window using the assessment notice and official authority.
How do appeals work in Nassau County?
Outside New York City, you contest your assessment by filing a grievance (Form RP-524) with your town or city’s Board of Assessment Review, generally on or before Grievance Day. If the board doesn’t give you what the evidence supports, homeowners can continue to Small Claims Assessment Review (SCAR) for a $30 filing fee — a homeowner-friendly forum where a licensed appraisal is the classic winning exhibit. On Long Island, grievance filing is so common it’s practically an annual ritual, and Nassau County runs its own Assessment Review Commission with a distinct calendar.
What evidence should I bring?
Comparable sales as of the assessment date, adjusted for the differences between those homes and yours — potential supporting evidence. Check the reviewing authority’s rules for admissibility, valuation date, forms and filing. An appraisal does not guarantee a reduction.
See if a grievance is worth it.
$5, credited toward your appraisal.