Nassau County Assessment Reductions by City and School District
See recent average assessment reductions in your area, then check whether your own home may qualify.
How much have homeowners near you recently reduced their assessments? Start with area averages based on finalized 2025 tax appeal results, then run your own address because every property still depends on its market value, similar homes, and available evidence.
Countywide 2025 appeal results
Overall assessment reduction outcomes
This summary uses property-level finalized 2025 Nassau appeal result records. Each bucket shows the share of analyzed properties by recorded assessment cut.
Properties reduced
58.0%
196,855 of 339,130 analyzed
Average reduction
9.8%
Among properties with a recorded reduction
No recorded reduction
42.0%
142,275 analyzed properties
Cut ranges are based on property-level recorded reduction percentages in the finalized 2025 appeal results. They summarize countywide patterns, not a guarantee for any individual property.
ARC offer check
Does your 2026 ARC reduction offer look reasonable?
Enter the reduction percentage ARC offered and compare it with finalized 2025 Nassau appeal results. You can use the countywide benchmark or narrow the comparison to a city or school district when a local sample is available.
Compare against
No reduction
42.0%
countywide
2025 avg if reduced
9.8%
countywide
2025 median if reduced
9.1%
countywide
Enter the percentage from your ARC offer to compare it with the recent distribution.
Average reduction by city
Recent assessment reductions by Nassau city or Census place
These areas are sorted by average assessment cut. The table starts with the top 10, with search and full-list access available when you need a specific place.
| Check Your Home | ||||
|---|---|---|---|---|
| Mill Neck | 62.0% | 15.4% | 14.2% | Check Your Home |
| Floral Park | 58.7% | 14.4% | 14.9% | Check Your Home |
| New Hyde Park | 64.8% | 13.1% | 13.1% | Check Your Home |
| East Norwich | 62.3% | 13.0% | 13.0% | Check Your Home |
| Manhasset | 69.4% | 12.9% | 12.1% | Check Your Home |
| Rockville Centre | 71.2% | 12.7% | 12.5% | Check Your Home |
| Great Neck | 69.7% | 12.7% | 12.1% | Check Your Home |
| Oyster Bay | 55.8% | 12.6% | 11.7% | Check Your Home |
| Mineola | 53.5% | 12.6% | 12.7% | Check Your Home |
| Williston Park | 63.5% | 12.3% | 12.3% | Check Your Home |
Average reduction by school district
Recent assessment reductions by Nassau school district
Nassau homeowners often think about taxes through school districts. These results are sorted by average assessment cut and folded to the top 10 by default.
| Check Your Home | ||||
|---|---|---|---|---|
| Floral Park-Bellerose Union Free School District | 59.1% | 14.6% | 15.1% | Check Your Home |
| New Hyde Park-Garden City Park Union Free School District | 62.9% | 13.9% | 14.2% | Check Your Home |
| Oyster Bay-East Norwich Central School District | 58.4% | 12.9% | 12.2% | Check Your Home |
| Manhasset Union Free School District | 68.3% | 12.8% | 12.0% | Check Your Home |
| Great Neck Public Schools | 70.0% | 12.7% | 12.2% | Check Your Home |
| Rockville Centre Union Free School District | 73.6% | 12.5% | 12.4% | Check Your Home |
| Mineola Union Free School District | 53.3% | 12.1% | 12.3% | Check Your Home |
| Herricks Union Free School District | 71.4% | 12.1% | 12.0% | Check Your Home |
| Jericho Union Free School District | 75.5% | 12.1% | 11.5% | Check Your Home |
| Port Washington Union Free School District | 64.4% | 12.0% | 11.2% | Check Your Home |
Data note: Glen Cove is excluded from Nassau County comparison tables because school-tax billing and assessment records are maintained separately by the City of Glen Cove and are not fully available in the countywide data used for these comparisons.
What this means
Area averages are a starting point.
Area averages do not guarantee your result. Your home still needs its own review based on market value, similar homes, and recent sales.
Check My AddressAdvanced data
Advanced signals for deeper review
Open this section for assessment spread, opportunity score, candidate rate, evidence readiness, remaining modeled opportunity, home-type signals, and tax growth.
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Advanced data
Advanced signals for deeper review
Open this section for assessment spread, opportunity score, candidate rate, evidence readiness, remaining modeled opportunity, home-type signals, and tax growth.
Advanced view
Apply one area view across every advanced section.
Where Assessments Look Least Consistent
The Nassau County assessment system is not perfectly even. In these areas, similar homes can sit far apart in the assessment model, which may mean some homeowners are carrying more than their fair share.
Start here if you want to know whether the system looks uneven near you.
Fairness check
Lawrence currently shows the widest assessment spread.
Similar local homes in this area show an assessment spread of 92.8%. Higher spread means comparable homes are farther apart in the assessment model.
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Cities with widest assessment spread
These cities and Census places show the largest gap between lower-end and higher-end assessment positions among comparable local homes.
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
Where Nassau Homeowners Are Leaving Money on the Table
Once you know the system looks uneven, the next question is money. This map shows where recent assessment reductions are concentrated, and the table ranks areas by the size and strength of the remaining appeal opportunity.
Millions of dollars in potential annual savings appear concentrated in specific cities and school districts.
Opportunity check
Elmont ranks highest by combined opportunity score.
This area has 4,394 candidate homes and an estimated savings pool of $6,808,818.
2025 Assessment Reduction Share by City
Each shaded area shows the percentage of properties in that city or Census place that received an assessment reduction in the most recent finalized appeal cycle, filing year 2025.
Showing 71 of 71
All city opportunities ranked by combined score
Cities and Census places with enough source records are ranked by an opportunity score: 35% candidate rate, 30% total estimated savings pool, 20% average savings per candidate, and 15% comparable evidence availability. The score is a prioritization measure, not a probability.
| Rank | Opportunity Score | City | Candidate Homes | Total Est. Savings | Avg. Savings / Candidate | Candidate Rate | View |
|---|---|---|---|---|---|---|---|
| 1 | 38.11 | Elmont | 4,394 | $6,808,818 | $1,550 | 52.2% | Insights |
| 2 | 35.96 | Baldwin | 3,496 | $7,261,519 | $2,077 | 40.7% | Insights |
| 3 | 35.84 | Valley Stream | 5,411 | $7,647,854 | $1,413 | 47.0% | Insights |
| 4 | 34.73 | Hicksville | 4,579 | $8,443,754 | $1,844 | 38.6% | Insights |
| 5 | 34.59 | Freeport | 4,193 | $4,696,831 | $1,120 | 45.8% | Insights |
| 6 | 33.88 | Levittown | 4,662 | $8,063,344 | $1,730 | 36.0% | Insights |
| 7 | 33.69 | Westbury | 3,909 | $6,363,495 | $1,628 | 37.4% | Insights |
| 8 | 33.28 | New Hyde Park | 3,138 | $8,641,898 | $2,754 | 29.6% | Insights |
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
Why an Appeal Matters Now
School and general taxes are rising fast. If the base assessment is wrong, every new tax increase can make that mistake more expensive.
Use this section to see where tax pressure has grown fastest.
Urgency check
Island Park shows the fastest school-tax growth in this view.
Average school tax growth is 37.9%, compared with general tax growth of 8.01%.
Showing 71 of 71
Cities ranked by school tax growth
Cities and Census places with enough source records are ranked by average school tax growth from 2022 through 2026.
| Rank | City | Properties | School Tax Growth | General Tax Growth | School vs General Gap | View |
|---|---|---|---|---|---|---|
| 1 | Island Park | 2,190 | 37.9% | 8.0% | 29.9% | Insights |
| 2 | Sea Cliff | 1,600 | 17.1% | 3.5% | 13.6% | Insights |
| 3 | Jericho | 3,045 | 15.2% | 7.7% | 7.5% | Insights |
| 4 | South Hempstead | 122 | 13.8% | 12.9% | 0.9% | Insights |
| 5 | Great Neck | 8,033 | 13.6% | -2.8% | 16.4% | Insights |
| 6 | Port Washington | 7,379 | 12.6% | 0.9% | 11.8% | Insights |
| 7 | Uniondale | 5,028 | 12.4% | 1.4% | 11.0% | Insights |
| 8 | Syosset | 7,252 | 12.1% | 6.7% | 5.5% | Insights |
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
It Pays to Fight Back
Winning is possible when the evidence supports it. Historical reductions reflect results from the most recent appeal filing year with finalized outcomes: 2025. They are not guarantees; every property still requires its own review.
This section shows where homeowners recently succeeded in cutting assessments.
Proof check
Mill Neck led this view for recent assessment cuts.
The average recorded assessment cut was 15.4% in the most recent finalized filing year.
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Cities ranked by historical assessment cuts
These cities and Census places are ranked by average assessment reductions recorded in the most recent finalized appeal filing year, 2025.
| Rank | City | Properties Reduced | Avg. Assessment Cut | Median Assessment Cut | View |
|---|---|---|---|---|---|
| 1 | Mill Neck | 101 | 15.4% | 14.2% | Insights |
| 2 | Floral Park | 3,074 | 14.5% | 14.9% | Insights |
| 3 | New Hyde Park | 6,878 | 13.1% | 13.1% | Insights |
| 4 | East Norwich | 522 | 13.0% | 13.0% | Insights |
| 5 | Manhasset | 3,199 | 12.9% | 12.1% | Insights |
| 6 | Rockville Centre | 4,394 | 12.7% | 12.5% | Insights |
| 7 | Great Neck | 5,597 | 12.7% | 12.1% | Insights |
| 8 | Oyster Bay | 1,227 | 12.6% | 11.7% | Insights |
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
Recent Wins May Still Leave Money Behind
A 2025 reduction is a good sign, but it does not always mean the assessment is now fully supported. This section subtracts the prior assessment cut from the model's total potential reduction signal, then shows where a positive remaining signal may still exist.
Areas near the top show visible recent appeal success plus additional modeled remaining opportunity after accounting for the prior cut.
Still worth checking
Jericho shows recent wins and remaining modeled opportunity.
Reduced properties in this area averaged a 12.3% recent assessment cut. After subtracting that prior cut from the model's total potential reduction signal, the average remaining signal is 5.41%.
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Cities where recent wins may not have closed the gap
These cities and Census places compare average 2025 assessment cuts with the model's remaining reduction signal among properties that already received a recent reduction.
| Rank | Remaining Opportunity | City | Recently Reduced | Recent Win Share | Avg. Recent Cut | Avg. Modeled Potential | Avg. Remaining Signal | Positive Remaining Share | View |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 50.59 | Jericho | 2,418 | 79.4% | 12.3% | 17.5% | 5.4% | 88.7% | Insights |
| 2 | 50.47 | Old Bethpage | 1,175 | 78.9% | 10.7% | 15.6% | 5.1% | 89.6% | Insights |
| 3 | 49.44 | Roslyn | 2,148 | 69.3% | 9.8% | 16.4% | 6.8% | 93.9% | Insights |
| 4 | 49.34 | Woodmere | 2,538 | 69.2% | 8.7% | 15.0% | 6.4% | 94.3% | Insights |
| 5 | 49.31 | Plainview | 6,364 | 73.3% | 9.1% | 13.9% | 5.0% | 91.7% | Insights |
| 6 | 49.24 | Syosset | 5,353 | 73.8% | 9.9% | 14.8% | 5.0% | 90.1% | Insights |
| 7 | 49.16 | Manhasset | 3,199 | 69.4% | 12.9% | 19.8% | 7.1% | 90.6% | Insights |
| 8 | 49.12 | Woodbury | 1,200 | 71.8% | 9.0% | 14.3% | 5.4% | 91.6% | Insights |
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
Can the Review Be Backed by Evidence?
A strong appeal needs more than frustration. It needs comparable homes, recent sales, and a clear argument that the assessment is not well supported.
This section shows where comparable evidence is already strongest for property-level review.
Evidence check
Levittown has the strongest comparable-evidence score in this view.
Its evidence readiness score is 92.5, based on equity comps, sales comps, and top equity match quality.
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Cities where comparable evidence is strongest
These cities and Census places are ranked by the availability and strength of comparable evidence. The score combines equity comparable count, sales comparable count, and top equity match quality.
| Rank | City | Equity Comps | Sales Comps | Top Equity Match | Evidence Readiness | View |
|---|---|---|---|---|---|---|
| 1 | Levittown | 9.6 | 9.1 | 88.2% | 92.45 | Insights |
| 2 | South Floral Park | 9.8 | 8.5 | 85.5% | 90.29 | Insights |
| 3 | Massapequa Park | 9.7 | 8 | 86.6% | 88.11 | Insights |
| 4 | East Meadow | 9.5 | 8.1 | 85% | 87.4 | Insights |
| 5 | North Massapequa | 9.8 | 7.6 | 87.4% | 87.07 | Insights |
| 6 | Plainview | 9.5 | 7.9 | 85.5% | 86.71 | Insights |
| 7 | Old Bethpage | 9.7 | 7.6 | 85.8% | 86.37 | Insights |
| 8 | Baldwin | 9.3 | 7.9 | 81.4% | 85.08 | Insights |
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
Which Home Types May Deserve a Closer Look?
Some combinations of home style and build era show stronger appeal opportunity than others. This is not a verdict on any one property, but it can help homeowners decide whether a closer review is worthwhile.
Some style and era combinations show a higher concentration of reduction probability, savings, and historical assessment cuts.
Style and build-era signals
Each card groups homes by architectural style and build era. The opportunity score combines median reduction probability, average estimated savings, median equity position, and historical reduction rate for that group.
SPLIT LEVEL
Built 2000 or later
90 properties
RANCH
Built 2000 or later
213 properties
MODIFIED RANCH
Built 1980-1999
76 properties
MANSION, ESTATE
Built 1980-1999
50 properties
CAPE
Built 2000 or later
216 properties
COLONIAL
Built 2000 or later
11,904 properties
CAPE
Built 1980-1999
325 properties
MANSION, ESTATE
Built 2000 or later
129 properties
COLONIAL
Built 1980-1999
4,508 properties
MANSION, ESTATE
Built pre-1940
83 properties
CONTEMPORARY
Built 1980-1999
1,323 properties
SPLANCH
Built 1980-1999
172 properties
CARRIAGE HOUSE
Built pre-1940
55 properties
CONTEMPORARY
Built 1960-1979
349 properties
Tudor
Built pre-1940
544 properties
CONTEMPORARY
Built 2000 or later
746 properties
HOMOWNER ASSOC
Built 2000 or later
722 properties
SPLIT LEVEL
Built 1980-1999
66 properties
MODIFIED RANCH
Built 1960-1979
591 properties
HOMOWNER ASSOC
Built 1980-1999
1,014 properties
Estimated savings are not guarantees. Actual outcomes depend on property-specific evidence and assessment review decisions.
How FairValue organizes the signal
Countywide patterns are useful for context. A property-level audit narrows the same data into evidence for one home.
Market value comparison
Peer equity review
Comparable sales review
Historical reduction patterns
Evidence readiness scoring
Find out exactly how much you could save.
We have done the math for Nassau County. Now, let us look at your specific home. Enter your address to see if your assessment may be due for a reduction.
Important note
FairValue Tax provides data-driven informational guidance for Nassau County property assessment review. Estimated savings, reduction probabilities, and assessment signals are not guarantees. Final outcomes depend on property-specific evidence, exemptions, applicable assessment rules, and review decisions by the appropriate assessment authority.