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Single Family ResidenceResidential
$795,513$308 / 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 Aug 30, 2026

137 UNION ST

FREEPORT, NY 11520
4.5
Baths
2,580 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
2023
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$796K
$751K low$840K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,209 (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.$508 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$133
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$375
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$120
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$508,000

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
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.13
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, 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
Ulysses Byas Elementary SchoolC-
Elementary · Grades KG–6 · 0.3 mi
M
Roosevelt Middle SchoolD-
Middle · Grades 7–8 · 1.1 mi
H
Roosevelt High SchoolD+
High · Grades 9–12 · 1.3 mi

District: Roosevelt 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

137 Union St 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 91% of homes in Freeport 11520
  • Among the lowest price per square foot in Nassau County
  • Bigger than 92% of homes in Freeport 11520
  • Has a smaller lot than 73% of homes in Nassau County
  • Among the newest 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$929K

This home is worth more than 91% of 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$795,513
CheaperTypical $641,368Pricier

Pricier than 91% of homes nearby

Price per ft²$308
CheaperTypical $407Pricier

Pricier than 9% of homes nearby

Living area2,580 ft²
SmallerTypical 1,627 ft²Bigger

Bigger than 92% of homes nearby

Lot size0.13 ac
SmallerTypical 0.14 acBigger

Bigger than 36% of homes nearby

Year built2023
OlderTypical 1942Newer

Newer than almost all homes nearby

How 137 Union St ranks against every home in each area.
MeasureThis homeFreeport 11520Nassau County
Estimated valuepricier than$795,51391% of homes44% of homes
Price per ft²pricier than$3089% of homesalmost no homes
Living areabigger than2,580 ft²92% of homes84% of homes
Lot sizebigger than0.13 ac36% of homes27% of homes
Year builtnewer than2023almost all homesalmost all homes

About 137 Union St

How much is 137 Union St, Freeport, NY worth?

The TopHap Estimate for 137 Union St, Freeport, NY is $795,513 as of Aug 30, 2026. The likely range is $751,384 to $839,642. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 137 Union St, Freeport, NY last sell?

137 Union St, Freeport, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 137 Union St, Freeport, NY?

137 Union St, Freeport, NY has 4.5 bathrooms, 2,580 square feet of living space and a 0.13-acre lot.

When was 137 Union St, Freeport, NY built?

137 Union St, Freeport, NY was built in 2023, making it 3 years old. It is a colonial home. The building has 2 stories.

What schools serve 137 Union St, Freeport, NY?

137 Union St, Freeport, NY is assigned to Ulysses Byas Elementary School (elementary), rated C-; Roosevelt Middle School (middle), rated D-; Roosevelt High School (high), rated D+. All sit in Roosevelt Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 137 Union St, Freeport, NY compare to other homes in Freeport 11520?

Among the 9,174 homes in Freeport 11520, it is worth more than 91% of them ($795,513 against a typical $641,368), its price per square foot is higher than 9% of them ($308 against a typical $407), it is bigger than 92% of them (2,580 ft² against a typical 1,627 ft²), its lot is bigger than 36% of them (0.13 ac against a typical 0.14 ac) and it is newer than almost all of them (2023 against a typical 1942). Measured against all of Nassau County, it is worth more than 44% 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 137 Union St, Freeport, NY?

The 2025 property tax bill for 137 Union St, Freeport, NY was $2,209. The county assessed it at $508.

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