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Single Family ResidenceResidential
$1,163,913$662 / 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 87How 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

21 ELM ST

GREAT NECK, NY 11021
1
Baths
1,758 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1913
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.2M
$1M low$1.3M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,330 (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.$741 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$371
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$370
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$764
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$741,000

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
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
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
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 258 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
Saddle Rock Elementary SchoolB+
Elementary · Grades KG–5 · 0.8 mi
H
John L. Miller Great Neck North High SchoolA
High · Grades 9–12 · 0.9 mi
M
Richard S. Sherman Great Neck North Middle SchoolB+
Middle · Grades 6–8 · 1.2 mi

District: Great Neck Union Free School District

Neighborhood · ZIP 11021These 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.133
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.19,074
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,979 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$121,759
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$170,548
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%

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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

21 Elm St 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 less than 81% of homes in Great Neck 11021
  • Costs more per square foot than 86% of homes in Nassau County
  • Smaller than 83% of homes in Great Neck 11021
  • Has a smaller lot than 93% of homes in Great Neck 11021
  • Older than 97% of homes in Great Neck 11021

What homes are worth in Great Neck 11021

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

This home
$666K$4.3M

This home is worth more than 19% of homes in Great Neck 11021.

How it measures up in Great Neck 11021

The dot is this home. The mark in the middle is the typical home in Great Neck 11021.

Estimated value$1,163,913
CheaperTypical $1,667,570Pricier

Pricier than 19% of homes nearby

Price per ft²$662
CheaperTypical $667Pricier

Pricier than 48% of homes nearby

Living area1,758 ft²
SmallerTypical 2,624 ft²Bigger

Bigger than 17% of homes nearby

Lot size0.11 ac
SmallerTypical 0.25 acBigger

Bigger than 7% of homes nearby

Year built1913
OlderTypical 1940Newer

Newer than 3% of homes nearby

How 21 Elm St ranks against every home in each area.
MeasureThis homeGreat Neck 11021Nassau County
Estimated valuepricier than$1,163,91319% of homes78% of homes
Price per ft²pricier than$66248% of homes86% of homes
Living areabigger than1,758 ft²17% of homes52% of homes
Lot sizebigger than0.11 ac7% of homes16% of homes
Year builtnewer than19133% of homes3% of homes

About 21 Elm St

How much is 21 Elm St, Great Neck, NY worth?

The TopHap Estimate for 21 Elm St, Great Neck, NY is $1,163,913 as of Sep 24, 2026. The likely range is $1,010,351 to $1,317,475. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Elm St, Great Neck, NY last sell?

21 Elm St, Great Neck, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Elm St, Great Neck, NY?

21 Elm St, Great Neck, NY has 1 bathrooms, 1,758 square feet of living space and a 0.12-acre lot.

When was 21 Elm St, Great Neck, NY built?

21 Elm St, Great Neck, NY was built in 1913, making it 113 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 Elm St, Great Neck, NY?

21 Elm St, Great Neck, NY is assigned to Saddle Rock Elementary School (elementary), rated B+; John L. Miller Great Neck North High School (high), rated A; Richard S. Sherman Great Neck North Middle School (middle), rated B+. All sit in Great Neck Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Elm St, Great Neck, NY compare to other homes in Great Neck 11021?

Among the 3,615 homes in Great Neck 11021, it is worth more than 19% of them ($1,163,913 against a typical $1,667,570), its price per square foot is higher than 48% of them ($662 against a typical $667), it is bigger than 17% of them (1,758 ft² against a typical 2,624 ft²), its lot is bigger than 7% of them (0.11 ac against a typical 0.25 ac) and it is newer than 3% of them (1913 against a typical 1940). Measured against all of Nassau County, it is worth more than 78% 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 Elm St, Great Neck, NY?

The 2025 property tax bill for 21 Elm St, Great Neck, NY was $9,330. The county assessed it at $741.

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