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Multi-Family Dwellings (Generic, Any Combination)Residential

21 MILL RIVER RD

GLEN HEAD, NY 11545
2
Baths
2,642 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.
0.45 ac
Lot SizeThe size of the land the home sits on, from county records.
1923
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,966 (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.$669 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$430
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$239
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$669
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$669,000

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.7 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.Multi-Family Dwellings (Generic, Any Combination)
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.45
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.Deck · 182 ft²Patio · 140 ft²Porch · 335 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
Theodore Roosevelt School
Elementary · Grades PK–2 · 0.7 mi
M
Oyster Bay Middle SchoolA+
Middle · Grades 7–8 · 1.0 mi
H
Oyster Bay High SchoolA
High · Grades 9–12 · 1.0 mi

District: Oyster Bay-East Norwich Central School District

Neighborhood · ZIP 11545These 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.69
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.115
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.97

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.5%
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.11,803
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.907 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$190,962
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$283,226
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 Mill River 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.

  • Bigger than 85% of homes in Nassau County
  • Has a bigger lot than 94% of homes in Nassau County
  • Older than 94% of homes in Glen Head 11545

How it measures up in Glen Head 11545

The dot is this home. The mark in the middle is the typical home in Glen Head 11545.

Living area2,642 ft²
SmallerTypical 2,834 ft²Bigger

Bigger than 47% of homes nearby

Lot size0.45 ac
SmallerTypical 0.49 acBigger

Bigger than 49% of homes nearby

Year built1923
OlderTypical 1958Newer

Newer than 6% of homes nearby

How 21 Mill River Rd ranks against every home in each area.
MeasureThis homeGlen Head 11545Nassau County
Living areabigger than2,642 ft²47% of homes85% of homes
Lot sizebigger than0.45 ac49% of homes94% of homes
Year builtnewer than19236% of homes7% of homes

About 21 Mill River Rd

When did 21 Mill River Rd, Glen Head, NY last sell?

21 Mill River Rd, Glen Head, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Mill River Rd, Glen Head, NY?

21 Mill River Rd, Glen Head, NY has 2 bathrooms, 2,642 square feet of living space and a 0.45-acre lot.

When was 21 Mill River Rd, Glen Head, NY built?

21 Mill River Rd, Glen Head, NY was built in 1923, making it 103 years old. The building has 2 stories.

What schools serve 21 Mill River Rd, Glen Head, NY?

21 Mill River Rd, Glen Head, NY is assigned to Theodore Roosevelt School (elementary); Oyster Bay Middle School (middle), rated A+; Oyster Bay High School (high), rated A. All sit in Oyster Bay-East Norwich Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Mill River Rd, Glen Head, NY compare to other homes in Glen Head 11545?

Among the 3,886 homes in Glen Head 11545, it is bigger than 47% of them (2,642 ft² against a typical 2,834 ft²), its lot is bigger than 49% of them (0.45 ac against a typical 0.49 ac) and it is newer than 6% of them (1923 against a typical 1958). 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 Mill River Rd, Glen Head, NY?

The 2025 property tax bill for 21 Mill River Rd, Glen Head, NY was $10,966. The county assessed it at $669.

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