Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,245,592
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 85How 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 $1,300,000 on Nov 16, 2015

399 GREAT RIVER RD

GREAT RIVER, NY 11739
0
Baths
0.58 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$2.2M
$1.9M low$2.6M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,300,000 · Nov 16, 2015
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.$2,245,592
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,796,474

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.$112,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$23,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$89,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,588,732

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.108 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.62%
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.0.58
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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 · 1.3 mi
H
East Islip High SchoolA
High · Grades 9–12 · 2.6 mi
M
East Islip Middle SchoolC+
Middle · Grades 6–8 · 2.6 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

399 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 more than 98% of homes in Great River
  • Has a bigger lot than 81% of homes in Suffolk County

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 98% 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$2,245,592
CheaperTypical $1,110,401Pricier

Pricier than 98% of homes nearby

Lot size0.58 ac
SmallerTypical 0.5 acBigger

Bigger than 63% of homes nearby

How 399 Great River Rd ranks against every home in each area.
MeasureThis homeGreat RiverGreat River 11739Suffolk County
Estimated valuepricier than$2,245,59298% of homes98% of homes95% of homes
Lot sizebigger than0.58 ac71% of homes63% of homes81% of homes

About 399 Great River Rd

How much is 399 Great River Rd, Great River, NY worth?

The TopHap Estimate for 399 Great River Rd, Great River, NY is $2,245,592 as of Jul 14, 2026. The likely range is $1,906,381 to $2,584,803. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 399 Great River Rd, Great River, NY last sell?

399 Great River Rd, Great River, NY last sold on Nov 16, 2015 for $1,300,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

What schools serve 399 Great River Rd, Great River, NY?

399 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 399 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 98% of them ($2,245,592 against a typical $1,110,401) and its lot is bigger than 63% of them (0.58 ac against a typical 0.5 ac). Measured against all of Suffolk County, it is worth more than 95% 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

Explore the area

See this home in context

Open 399 Great River Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map