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Single Family ResidenceResidential
$926,048$503 / 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 Jul 14, 2026
Last sold for $750,018 on Aug 8, 2025

21 BIRCHWOOD DR

GREAT RIVER, NY 11739
0
Baths
1,842 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.
1961
Year BuiltThe year the home was originally built, according to county records.

Valuation

$926K
$867K low$985K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$750,018 · Aug 8, 2025
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$926,048
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$740,838

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$62,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$20,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$42,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$884,507

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.48 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.45%
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
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.45
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

Transaction History(2)

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
Timber Point Elementary School
Elementary · Grades KG–2 · 0.7 mi
H
East Islip High SchoolA
High · Grades 9–12 · 1.9 mi
M
East Islip Middle SchoolC+
Middle · Grades 6–8 · 1.9 mi

District: East Islip Union Free School District

Neighborhood · ZIP 11739These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.64

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.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
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.1,550
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.290 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$150,601
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$186,236
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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 Birchwood Dr 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 84% of homes in Great River 11739
  • Costs more per square foot than 72% of homes in Great River
  • Smaller than 86% of homes in Great River 11739
  • Has a smaller lot than 81% of homes in Great River 11739
  • Older than 69% of homes in Great River

What homes are worth in Great River 11739

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

This home
$720K$2.3M

This home is worth more than 16% of homes in Great River 11739.

How it measures up in Great River 11739

The dot is this home. The mark in the middle is the typical home in Great River 11739.

Estimated value$926,048
CheaperTypical $1,110,401Pricier

Pricier than 16% of homes nearby

Price per ft²$503
CheaperTypical $502Pricier

Pricier than 51% of homes nearby

Living area1,842 ft²
SmallerTypical 2,414 ft²Bigger

Bigger than 14% of homes nearby

Lot size0.45 ac
SmallerTypical 0.5 acBigger

Bigger than 19% of homes nearby

Year built1961
OlderTypical 1961Newer

Newer than 51% of homes nearby

How 21 Birchwood Dr ranks against every home in each area.
MeasureThis homeGreat RiverGreat River 11739Suffolk County
Estimated valuepricier than$926,04832% of homes16% of homes77% of homes
Price per ft²pricier than$50372% of homes51% of homes71% of homes
Living areabigger than1,842 ft²51% of homes14% of homes58% of homes
Lot sizebigger than0.45 ac35% of homes19% of homes70% of homes
Year builtnewer than196131% of homes51% of homes34% of homes

About 21 Birchwood Dr

How much is 21 Birchwood Dr, Great River, NY worth?

The TopHap Estimate for 21 Birchwood Dr, Great River, NY is $926,048 as of Jul 14, 2026. The likely range is $866,703 to $985,393. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Birchwood Dr, Great River, NY last sell?

21 Birchwood Dr, Great River, NY last sold on Aug 8, 2025 for $750,018, according to the county's recorded deed.

How big is 21 Birchwood Dr, Great River, NY?

21 Birchwood Dr, Great River, NY has 1,842 square feet of living space and a 0.45-acre lot.

When was 21 Birchwood Dr, Great River, NY built?

21 Birchwood Dr, Great River, NY was built in 1961, making it 65 years old.

What schools serve 21 Birchwood Dr, Great River, NY?

21 Birchwood Dr, Great River, NY is assigned to Timber Point Elementary School (elementary); East Islip High School (high), rated A; East Islip Middle School (middle), rated C+. All sit in East Islip Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Birchwood Dr, Great River, NY compare to other homes in Great River 11739?

Among the 383 homes in Great River 11739, it is worth more than 16% of them ($926,048 against a typical $1,110,401), its price per square foot is higher than 51% of them ($503 against a typical $502), it is bigger than 14% of them (1,842 ft² against a typical 2,414 ft²), its lot is bigger than 19% of them (0.45 ac against a typical 0.5 ac) and it is newer than 51% of them (1961 against a typical 1961). Measured against all of Suffolk County, it is worth more than 77% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

Closest homes

More homes in Great River 11739

Assigned schools

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