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Single Family ResidenceResidential
$635,727$335 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $380,000 on Sep 25, 2013

4 BISCAYNE DR

MOUNT SINAI, NY 11766
3
Beds
2
Baths
1,896 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.
0.52 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$636K
$591K low$681K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$380,000 · Sep 25, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,077 (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.$2,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$450
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,350
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$583,333

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.52
HeatingThe type of heating system in the home.Radiant
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Waterfront

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
Mount Sinai Elementary SchoolA-
Elementary · Grades KG–4 · 2.0 mi
M
Mount Sinai Middle SchoolA
Middle · Grades 5–8 · 2.2 mi
H
Mount Sinai High SchoolA
High · Grades 9–12 · 2.4 mi

District: Mount Sinai Union Free School District

Neighborhood · ZIP 11766These 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.47
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.65

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.12,676
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,703 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$143,038
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,700
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

4 Biscayne 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 77% of homes in Mount Sinai 11766
  • Costs less per square foot than 78% of homes in Suffolk County
  • Smaller than 65% of homes in Mount Sinai 11766
  • Has a bigger lot than 77% of homes in Suffolk County

What homes are worth in Mount Sinai 11766

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

This home
$443K$1.5M

This home is worth more than 23% of homes in Mount Sinai 11766.

How it measures up in Mount Sinai 11766

The dot is this home. The mark in the middle is the typical home in Mount Sinai 11766.

Estimated value$635,727
CheaperTypical $762,652Pricier

Pricier than 23% of homes nearby

Price per ft²$335
CheaperTypical $357Pricier

Pricier than 33% of homes nearby

Living area1,896 ft²
SmallerTypical 2,144 ft²Bigger

Bigger than 35% of homes nearby

Lot size0.52 ac
SmallerTypical 0.43 acBigger

Bigger than 56% of homes nearby

Year built1977
OlderTypical 1985Newer

Newer than 44% of homes nearby

How 4 Biscayne Dr ranks against every home in each area.
MeasureThis homeMount Sinai 11766Suffolk County
Estimated valuepricier than$635,72723% of homes37% of homes
Price per ft²pricier than$33533% of homes22% of homes
Living areabigger than1,896 ft²35% of homes62% of homes
Lot sizebigger than0.52 ac56% of homes77% of homes
Year builtnewer than197744% of homes64% of homes

About 4 Biscayne Dr

How much is 4 Biscayne Dr, Mount Sinai, NY worth?

The TopHap Estimate for 4 Biscayne Dr, Mount Sinai, NY is $635,727 as of Sep 24, 2026. The likely range is $590,732 to $680,722. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Biscayne Dr, Mount Sinai, NY last sell?

4 Biscayne Dr, Mount Sinai, NY last sold on Sep 25, 2013 for $380,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4 Biscayne Dr, Mount Sinai, NY?

4 Biscayne Dr, Mount Sinai, NY has 3 bedrooms, 2 bathrooms, 1,896 square feet of living space and a 0.52-acre lot.

When was 4 Biscayne Dr, Mount Sinai, NY built?

4 Biscayne Dr, Mount Sinai, NY was built in 1977, making it 49 years old. It is a colonial home. The building has 2 stories.

What schools serve 4 Biscayne Dr, Mount Sinai, NY?

4 Biscayne Dr, Mount Sinai, NY is assigned to Mount Sinai Elementary School (elementary), rated A-; Mount Sinai Middle School (middle), rated A; Mount Sinai High School (high), rated A. All sit in Mount Sinai Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4 Biscayne Dr, Mount Sinai, NY compare to other homes in Mount Sinai 11766?

Among the 4,447 homes in Mount Sinai 11766, it is worth more than 23% of them ($635,727 against a typical $762,652), its price per square foot is higher than 33% of them ($335 against a typical $357), it is bigger than 35% of them (1,896 ft² against a typical 2,144 ft²), its lot is bigger than 56% of them (0.52 ac against a typical 0.43 ac) and it is newer than 44% of them (1977 against a typical 1985). Measured against all of Suffolk County, it is worth more than 37% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4 Biscayne Dr, Mount Sinai, NY?

The 2024 property tax bill for 4 Biscayne Dr, Mount Sinai, NY was $11,077. The county assessed it at $2,800.

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