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Industrial (General)Industrial
Last sold for $3,850,000 on Jun 2, 2026

21 DEFOREST ST

AMITYVILLE, NY 11701
0
Baths
16,200 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$3,850,000 · Jun 2, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$42,488 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$16,270 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,380
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$14,890
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$843,006

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Industrial (General)
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.46
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
Edmund W. Miles Middle SchoolC-
Middle · Grades 6–8 · 0.8 mi
E
Northeast School
Elementary · Grades PK–KG · 0.9 mi

District: Amityville Union Free School District

Neighborhood · ZIP 11701These 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.80
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 100.81

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.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
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.26,590
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,033 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$104,679
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$140,592
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.58%

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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 Deforest 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.

  • Among the largest homes in Amityville 11701
  • Has a bigger lot than 94% of homes in Amityville 11701
  • Older than 76% of homes in Suffolk County

How it measures up in Amityville 11701

The dot is this home. The mark in the middle is the typical home in Amityville 11701.

Living area16,200 ft²
SmallerTypical 1,640 ft²Bigger

Bigger than almost all homes nearby

Lot size0.46 ac
SmallerTypical 0.2 acBigger

Bigger than 94% of homes nearby

Year built1956
OlderTypical 1954Newer

Newer than 56% of homes nearby

How 21 Deforest St ranks against every home in each area.
MeasureThis homeAmityville 11701Suffolk County
Living areabigger than16,200 ft²almost all homesalmost all homes
Lot sizebigger than0.46 ac94% of homes72% of homes
Year builtnewer than195656% of homes24% of homes

About 21 Deforest St

When did 21 Deforest St, Amityville, NY last sell?

21 Deforest St, Amityville, NY last sold on Jun 2, 2026 for $3,850,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Deforest St, Amityville, NY?

21 Deforest St, Amityville, NY has 16,200 square feet of living space and a 0.46-acre lot.

When was 21 Deforest St, Amityville, NY built?

21 Deforest St, Amityville, NY was built in 1956, making it 70 years old.

What schools serve 21 Deforest St, Amityville, NY?

21 Deforest St, Amityville, NY is assigned to Edmund W. Miles Middle School (middle), rated C-; Northeast School (elementary). All sit in Amityville Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Deforest St, Amityville, NY compare to other homes in Amityville 11701?

Among the 6,225 homes in Amityville 11701, it is bigger than almost all of them (16,200 ft² against a typical 1,640 ft²), its lot is bigger than 94% of them (0.46 ac against a typical 0.2 ac) and it is newer than 56% of them (1956 against a typical 1954). 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 Deforest St, Amityville, NY?

The 2024 property tax bill for 21 Deforest St, Amityville, NY was $42,488. The county assessed it at $16,270.

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