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Single Family ResidenceResidential
$1,500,000$647 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $750,000 on Jun 11, 2014

491 OLD WESTBURY RD

ROSLYN HEIGHTS, NY 11577
2
Baths
2,320 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.
1 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.5M
$1.4M low$1.6M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$750,000 · Jun 11, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$21,738 (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.$999 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$718
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$281
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$943
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,095,000

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.29 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.Ranch
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.1.00
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.No
ViewThe type of view from the property, or another feature of the site that affects value.Highway
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 862 ft²Patio · 862 ft²

Transaction History(4)

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

Foreclosure Filings(2)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Roslyn Middle SchoolA-
Middle · Grades 6–8 · 0.2 mi
H
Roslyn High SchoolA
High · Grades 9–12 · 0.6 mi
E
Roslyn Heights Elementary School
Elementary · Grades KG–11 · 0.8 mi

District: Roslyn Union Free School District

Neighborhood · ZIP 11577These 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.66
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.101

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.96%
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.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.12,075
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,980 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$184,838
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$245,584
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

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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

491 Old Westbury Rd 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.

  • Worth more than 88% of homes in Nassau County
  • Costs more per square foot than 84% of homes in Nassau County
  • Bigger than 78% of homes in Nassau County
  • Has a bigger lot than 96% of homes in Nassau County
  • Older than 65% of homes in Nassau County

What homes are worth in Roslyn Heights 11577

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

This home
$748K$3.1M

This home is worth more than 56% of homes in Roslyn Heights 11577.

How it measures up in Roslyn Heights 11577

The dot is this home. The mark in the middle is the typical home in Roslyn Heights 11577.

Estimated value$1,500,000
CheaperTypical $1,420,557Pricier

Pricier than 56% of homes nearby

Price per ft²$647
CheaperTypical $612Pricier

Pricier than 64% of homes nearby

Living area2,320 ft²
SmallerTypical 2,386 ft²Bigger

Bigger than 48% of homes nearby

Lot size1 ac
SmallerTypical 0.24 acBigger

Bigger than 94% of homes nearby

Year built1948
OlderTypical 1951Newer

Newer than 38% of homes nearby

How 491 Old Westbury Rd ranks against every home in each area.
MeasureThis homeRoslyn Heights 11577Nassau County
Estimated valuepricier than$1,500,00056% of homes88% of homes
Price per ft²pricier than$64764% of homes84% of homes
Living areabigger than2,320 ft²48% of homes78% of homes
Lot sizebigger than1 ac94% of homes96% of homes
Year builtnewer than194838% of homes35% of homes

About 491 Old Westbury Rd

How much is 491 Old Westbury Rd, Roslyn Heights, NY worth?

The TopHap Estimate for 491 Old Westbury Rd, Roslyn Heights, NY is $1,500,000 as of Aug 30, 2026. The likely range is $1,404,737 to $1,595,263. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 491 Old Westbury Rd, Roslyn Heights, NY last sell?

491 Old Westbury Rd, Roslyn Heights, NY last sold on Jun 11, 2014 for $750,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 491 Old Westbury Rd, Roslyn Heights, NY?

491 Old Westbury Rd, Roslyn Heights, NY has 2 bathrooms, 2,320 square feet of living space and a 1.00-acre lot.

When was 491 Old Westbury Rd, Roslyn Heights, NY built?

491 Old Westbury Rd, Roslyn Heights, NY was built in 1948, making it 78 years old. It is a ranch home. The building has 1 story.

What schools serve 491 Old Westbury Rd, Roslyn Heights, NY?

491 Old Westbury Rd, Roslyn Heights, NY is assigned to Roslyn Middle School (middle), rated A-; Roslyn High School (high), rated A; Roslyn Heights Elementary School (elementary). All sit in Roslyn Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 491 Old Westbury Rd, Roslyn Heights, NY compare to other homes in Roslyn Heights 11577?

Among the 3,676 homes in Roslyn Heights 11577, it is worth more than 56% of them ($1,500,000 against a typical $1,420,557), its price per square foot is higher than 64% of them ($647 against a typical $612), it is bigger than 48% of them (2,320 ft² against a typical 2,386 ft²), its lot is bigger than 94% of them (1 ac against a typical 0.24 ac) and it is newer than 38% of them (1948 against a typical 1951). Measured against all of Nassau County, it is worth more than 88% of 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 491 Old Westbury Rd, Roslyn Heights, NY?

The 2025 property tax bill for 491 Old Westbury Rd, Roslyn Heights, NY was $21,738. The county assessed it at $999.

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