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Single Family ResidenceResidential
$999,000$422 / 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 $930,000 on Sep 9, 2026

539 NASSAU AVE

FREEPORT, NY 11520
2
Baths
2,369 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$999K
$926K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$930,000 · Sep 9, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,097 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$470 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$152
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$318
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$459
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$470,000

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.48
100
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
57
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
82
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
1
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.120 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.89%
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.1 percent flood zone

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
StyleThe architectural style of the home, such as ranch or colonial.Raised Ranch
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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.Canal Front
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 783 ft²Patio · 783 ft²Porch · 40 ft²

Transaction History(7)

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(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Leo F Giblyn SchoolA-
Elementary · Grades KG–4 · 0.8 mi
M
John W Dodd Middle SchoolB-
Middle · Grades 7–8 · 1.8 mi
H
Freeport High SchoolC-
High · Grades 9–12 · 2.0 mi

District: Freeport Union Free School District

Neighborhood · ZIP 11520These 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.104
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 100.85

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.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.7%
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.44,881
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,383 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$108,641
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$142,991
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.56%

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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

539 Nassau Ave 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 most valuable homes in Freeport 11520
  • Costs less per square foot than 83% of homes in Nassau County
  • Bigger than 88% of homes in Freeport 11520
  • Has a smaller lot than 76% of homes in Nassau County
  • Newer than 90% of homes in Freeport 11520

What homes are worth in Freeport 11520

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

This home
$400K$928K

This home is worth more than almost all homes in Freeport 11520.

How it measures up in Freeport 11520

The dot is this home. The mark in the middle is the typical home in Freeport 11520.

Estimated value$999,000
CheaperTypical $645,803Pricier

Pricier than almost all homes nearby

Price per ft²$422
CheaperTypical $411Pricier

Pricier than 56% of homes nearby

Living area2,369 ft²
SmallerTypical 1,627 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.12 ac
SmallerTypical 0.14 acBigger

Bigger than 29% of homes nearby

Year built1970
OlderTypical 1942Newer

Newer than 90% of homes nearby

How 539 Nassau Ave ranks against every home in each area.
MeasureThis homeFreeport 11520Nassau County
Estimated valuepricier than$999,000almost all homes70% of homes
Price per ft²pricier than$42256% of homes17% of homes
Living areabigger than2,369 ft²88% of homes79% of homes
Lot sizebigger than0.12 ac29% of homes24% of homes
Year builtnewer than197090% of homes85% of homes

About 539 Nassau Ave

How much is 539 Nassau Ave, Freeport, NY worth?

The TopHap Estimate for 539 Nassau Ave, Freeport, NY is $999,000 as of Sep 24, 2026. The likely range is $926,399 to $1,071,601. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 539 Nassau Ave, Freeport, NY last sell?

539 Nassau Ave, Freeport, NY last sold on Sep 9, 2026 for $930,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 539 Nassau Ave, Freeport, NY?

539 Nassau Ave, Freeport, NY has 2 bathrooms, 2,369 square feet of living space and a 0.12-acre lot.

When was 539 Nassau Ave, Freeport, NY built?

539 Nassau Ave, Freeport, NY was built in 1970, making it 56 years old. It is a raised ranch home. The building has 1 story.

What schools serve 539 Nassau Ave, Freeport, NY?

539 Nassau Ave, Freeport, NY is assigned to Leo F Giblyn School (elementary), rated A-; John W Dodd Middle School (middle), rated B-; Freeport High School (high), rated C-. All sit in Freeport Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 539 Nassau Ave, Freeport, NY compare to other homes in Freeport 11520?

Among the 9,174 homes in Freeport 11520, it is worth more than almost all of them ($999,000 against a typical $645,803), its price per square foot is higher than 56% of them ($422 against a typical $411), it is bigger than 88% of them (2,369 ft² against a typical 1,627 ft²), its lot is bigger than 29% of them (0.12 ac against a typical 0.14 ac) and it is newer than 90% of them (1970 against a typical 1942). Measured against all of Nassau County, it is worth more than 70% 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 539 Nassau Ave, Freeport, NY?

The 2025 property tax bill for 539 Nassau Ave, Freeport, NY was $7,097. The county assessed it at $470.

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