Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$9,999,999$855 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 66How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

9 DUPONT CT

ROSLYN, NY 11576
6
Beds
8.5
Baths
11,701 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
5.08 ac
Lot SizeThe size of the land the home sits on, from county records.
2004
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
15
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$10M
$10M low$10M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$91,865 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$4,314 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,221
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$3,093
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$4,320
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$4,314,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Mansion
CountyNASSAU
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Tennis courtDeck · 28 ft²Patio · 1,681 ft²Porch · 171 ft²

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Neighborhood · ZIP 11576These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.78
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.104

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.13,502
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,896 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$189,117
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$255,113
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

Owner Tools

Do you own this home?
Claim this home

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

9 Dupont Ct measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Among the most valuable homes in Roslyn 11576
  • Costs more per square foot than 97% of homes in Nassau County
  • Among the largest homes in Roslyn 11576
  • Among the largest lots in Nassau County
  • Newer than 95% of homes in Nassau County

What homes are worth in Roslyn 11576

Each bar is how many homes fall in that price range. The marker is this home.

This home
$823K$3.8M

This home is worth more than almost all homes in Roslyn 11576.

How it measures up in Roslyn 11576

The dot is this home. The mark in the middle is the typical home in Roslyn 11576.

Estimated value$9,999,999
CheaperTypical $1,867,718Pricier

Pricier than almost all homes nearby

Price per ft²$855
CheaperTypical $638Pricier

Pricier than 93% of homes nearby

Living area11,701 ft²
SmallerTypical 2,784 ft²Bigger

Bigger than almost all homes nearby

Lot size5.08 ac
SmallerTypical 0.35 acBigger

Bigger than 92% of homes nearby

Year built2004
OlderTypical 1964Newer

Newer than 90% of homes nearby

How 9 Dupont Ct ranks against every home in each area.
MeasureThis homeRoslyn 11576Nassau County
Estimated valuepricier than$9,999,999almost all homesalmost all homes
Price per ft²pricier than$85593% of homes97% of homes
Living areabigger than11,701 ft²almost all homesalmost all homes
Lot sizebigger than5.08 ac92% of homesalmost all homes
Year builtnewer than200490% of homes95% of homes

About 9 Dupont Ct

How much is 9 Dupont Ct, Roslyn, NY worth?

The TopHap Estimate for 9 Dupont Ct, Roslyn, NY is $9,999,999 as of Sep 24, 2026. The likely range is $9,999,999 to $9,999,999. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9 Dupont Ct, Roslyn, NY last sell?

9 Dupont Ct, Roslyn, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 9 Dupont Ct, Roslyn, NY?

9 Dupont Ct, Roslyn, NY has 6 bedrooms, 8.5 bathrooms and 11,701 square feet of living space.

When was 9 Dupont Ct, Roslyn, NY built?

9 Dupont Ct, Roslyn, NY was built in 2004, making it 22 years old. It is a mansion home. The building has 2 stories.

How does 9 Dupont Ct, Roslyn, NY compare to other homes in Roslyn 11576?

Among the 4,807 homes in Roslyn 11576, it is worth more than almost all of them ($9,999,999 against a typical $1,867,718), its price per square foot is higher than 93% of them ($855 against a typical $638), it is bigger than almost all of them (11,701 ft² against a typical 2,784 ft²), its lot is bigger than 92% of them (5.08 ac against a typical 0.35 ac) and it is newer than 90% of them (2004 against a typical 1964). Measured against all of Nassau County, it is worth more than almost all homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 9 Dupont Ct, Roslyn, NY?

The 2025 property tax bill for 9 Dupont Ct, Roslyn, NY was $91,865. The county assessed it at $4,314.

More homes on Dupont Ct

Closest homes

More homes in Roslyn 11576

Explore the area

See this home in context

Open 9 Dupont Ct on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map