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Single Family ResidenceResidential
$875,000$350 / 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 81How 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 $895,000 on Aug 6, 2025

340 GREAT RIVER RD

GREAT RIVER, NY 11739
0
Baths
2,500 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.
0.6 ac
Lot SizeThe size of the land the home sits on, from county records.
1957
Year BuiltThe year the home was originally built, according to county records.

Valuation

$875K
$710K low$1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$895,000 · Aug 6, 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.$875,000
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$700,000

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.$60,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$23,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$37,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$857,746

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.0.60
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(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
Timber Point Elementary School
Elementary · Grades KG–2 · 1.0 mi
H
East Islip High SchoolA
High · Grades 9–12 · 2.3 mi
M
East Islip Middle SchoolC+
Middle · Grades 6–8 · 2.3 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.Yes

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

340 Great 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.

  • Worth less than 93% of homes in Great River 11739
  • Costs less per square foot than 94% of homes in Great River 11739
  • Bigger than 84% of homes in Suffolk County
  • Has a bigger lot than 81% of homes in Suffolk County
  • Older than 86% 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
$742K$2.2M

This home is worth more than 7% 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$875,000
CheaperTypical $1,110,401Pricier

Pricier than 7% of homes nearby

Price per ft²$350
CheaperTypical $500Pricier

Pricier than 6% of homes nearby

Living area2,500 ft²
SmallerTypical 2,439 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.6 ac
SmallerTypical 0.5 acBigger

Bigger than 66% of homes nearby

Year built1957
OlderTypical 1963Newer

Newer than 21% of homes nearby

How 340 Great River Rd ranks against every home in each area.
MeasureThis homeGreat RiverGreat River 11739Suffolk County
Estimated valuepricier than$875,00027% of homes7% of homes73% of homes
Price per ft²pricier than$35010% of homes6% of homes26% of homes
Living areabigger than2,500 ft²75% of homes55% of homes84% of homes
Lot sizebigger than0.6 ac74% of homes66% of homes81% of homes
Year builtnewer than195714% of homes21% of homes26% of homes

About 340 Great River Rd

How much is 340 Great River Rd, Great River, NY worth?

The TopHap Estimate for 340 Great River Rd, Great River, NY is $875,000 as of Jul 14, 2026. The likely range is $709,834 to $1,040,166. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 340 Great River Rd, Great River, NY last sell?

340 Great River Rd, Great River, NY last sold on Aug 6, 2025 for $895,000, according to the county's recorded deed.

How big is 340 Great River Rd, Great River, NY?

340 Great River Rd, Great River, NY has 2,500 square feet of living space and a 0.60-acre lot.

When was 340 Great River Rd, Great River, NY built?

340 Great River Rd, Great River, NY was built in 1957, making it 69 years old.

What schools serve 340 Great River Rd, Great River, NY?

340 Great River Rd, 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 340 Great River Rd, Great River, NY compare to other homes in Great River 11739?

Among the 365 homes in Great River 11739, it is worth more than 7% of them ($875,000 against a typical $1,110,401), its price per square foot is higher than 6% of them ($350 against a typical $500), it is bigger than 55% of them (2,500 ft² against a typical 2,439 ft²), its lot is bigger than 66% of them (0.6 ac against a typical 0.5 ac) and it is newer than 21% of them (1957 against a typical 1963). Measured against all of Suffolk County, it is worth more than 73% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on Great River Rd

Closest homes

More homes in Great River 11739

Assigned schools

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