Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,879,854$572 / 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 96How 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 $2,600,000 on Jun 17, 2021

21 THE LOCH

ROSLYN, NY 11576
3.5
Baths
5,032 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.
1.07 ac
Lot SizeThe size of the land the home sits on, from county records.
1938
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
14
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.9M
$2.8M low$3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,600,000 · Jun 17, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$38,200 (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.$1,716 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$685
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,031
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,728
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,716,000

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.Colonial
CountyNASSAU
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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.Patio · 384 ft²Porch · 60 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.

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

E
Roslyn Heights Elementary School
Elementary · Grades KG–11 · 0.9 mi
H
Roslyn High SchoolA
High · Grades 9–12 · 1.1 mi
M
Roslyn Middle SchoolA-
Middle · Grades 6–8 · 1.6 mi

District: Roslyn Union Free School District

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

21 The Loch 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 97% of homes in Nassau County
  • Costs less per square foot than 73% of homes in Roslyn 11576
  • Bigger than 97% of homes in Nassau County
  • Has a bigger lot than 96% of homes in Nassau County
  • Older than 93% of homes in Roslyn 11576

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
$853K$3.8M

This home is worth more than 92% of 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$2,879,854
CheaperTypical $1,799,000Pricier

Pricier than 92% of homes nearby

Price per ft²$572
CheaperTypical $625Pricier

Pricier than 27% of homes nearby

Living area5,032 ft²
SmallerTypical 2,804 ft²Bigger

Bigger than 95% of homes nearby

Lot size1.07 ac
SmallerTypical 0.35 acBigger

Bigger than 88% of homes nearby

Year built1938
OlderTypical 1965Newer

Newer than 7% of homes nearby

How 21 The Loch ranks against every home in each area.
MeasureThis homeRoslyn 11576Nassau County
Estimated valuepricier than$2,879,85492% of homes97% of homes
Price per ft²pricier than$57227% of homes68% of homes
Living areabigger than5,032 ft²95% of homes97% of homes
Lot sizebigger than1.07 ac88% of homes96% of homes
Year builtnewer than19387% of homes22% of homes

About 21 The Loch

How much is 21 The Loch, Roslyn, NY worth?

The TopHap Estimate for 21 The Loch, Roslyn, NY is $2,879,854 as of Aug 30, 2026. The likely range is $2,765,982 to $2,993,726. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 The Loch, Roslyn, NY last sell?

21 The Loch, Roslyn, NY last sold on Jun 17, 2021 for $2,600,000, according to the county's recorded deed.

How big is 21 The Loch, Roslyn, NY?

21 The Loch, Roslyn, NY has 3.5 bathrooms and 5,032 square feet of living space.

When was 21 The Loch, Roslyn, NY built?

21 The Loch, Roslyn, NY was built in 1938, making it 88 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 The Loch, Roslyn, NY?

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

How does 21 The Loch, Roslyn, NY compare to other homes in Roslyn 11576?

Among the 4,806 homes in Roslyn 11576, it is worth more than 92% of them ($2,879,854 against a typical $1,799,000), its price per square foot is higher than 27% of them ($572 against a typical $625), it is bigger than 95% of them (5,032 ft² against a typical 2,804 ft²), its lot is bigger than 88% of them (1.07 ac against a typical 0.35 ac) and it is newer than 7% of them (1938 against a typical 1965). Measured against all of Nassau County, it is worth more than 97% 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 21 The Loch, Roslyn, NY?

The 2025 property tax bill for 21 The Loch, Roslyn, NY was $38,200. The county assessed it at $1,716.

More homes on The Loch

Closest homes

More homes in Roslyn 11576

Assigned schools

Explore the area

See this home in context

Open 21 The Loch 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