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Single Family ResidenceResidential
$556,846$499 / 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

18 JEFFERSON ST

FREEPORT, NY 11520
1
Baths
1,115 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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.

Valuation

$557K
$516K low$598K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,312 (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.$296 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$135
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$161
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$296
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$296,000

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
99
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.86 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.84%
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.Cape Cod
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)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 168 ft²Patio · 168 ft²Porch · 128 ft²

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
Leo F Giblyn SchoolA-
Elementary · Grades KG–4 · 0.3 mi
M
John W Dodd Middle SchoolC+
Middle · Grades 7–8 · 1.2 mi
H
Freeport High SchoolC-
High · Grades 9–12 · 1.6 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

18 Jefferson 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 less than 96% of homes in Nassau County
  • Costs more per square foot than 88% of homes in Freeport 11520
  • Smaller than 91% of homes in Nassau County
  • Has a smaller lot than 89% 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
$410K$929K

This home is worth more than 20% 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$556,846
CheaperTypical $648,058Pricier

Pricier than 20% of homes nearby

Price per ft²$499
CheaperTypical $411Pricier

Pricier than 88% of homes nearby

Living area1,115 ft²
SmallerTypical 1,638 ft²Bigger

Bigger than 11% of homes nearby

Lot size0.11 ac
SmallerTypical 0.14 acBigger

Bigger than 11% of homes nearby

Year built1950
OlderTypical 1942Newer

Newer than 57% of homes nearby

How 18 Jefferson St ranks against every home in each area.
MeasureThis homeFreeport 11520Nassau County
Estimated valuepricier than$556,84620% of homes4% of homes
Price per ft²pricier than$49988% of homes43% of homes
Living areabigger than1,115 ft²11% of homes9% of homes
Lot sizebigger than0.11 ac11% of homes16% of homes
Year builtnewer than195057% of homes43% of homes

About 18 Jefferson St

How much is 18 Jefferson St, Freeport, NY worth?

The TopHap Estimate for 18 Jefferson St, Freeport, NY is $556,846 as of Sep 24, 2026. The likely range is $515,822 to $597,870. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Jefferson St, Freeport, NY last sell?

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

How big is 18 Jefferson St, Freeport, NY?

18 Jefferson St, Freeport, NY has 1 bathrooms, 1,115 square feet of living space and a 0.12-acre lot.

When was 18 Jefferson St, Freeport, NY built?

18 Jefferson St, Freeport, NY was built in 1950, making it 76 years old. It is a cape cod home. The building has 1 story.

What schools serve 18 Jefferson St, Freeport, NY?

18 Jefferson St, Freeport, NY is assigned to Leo F Giblyn School (elementary), rated A-; John W Dodd Middle School (middle), rated C+; 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 18 Jefferson St, Freeport, NY compare to other homes in Freeport 11520?

Among the 9,174 homes in Freeport 11520, it is worth more than 20% of them ($556,846 against a typical $648,058), its price per square foot is higher than 88% of them ($499 against a typical $411), it is bigger than 11% of them (1,115 ft² against a typical 1,638 ft²), its lot is bigger than 11% of them (0.11 ac against a typical 0.14 ac) and it is newer than 57% of them (1950 against a typical 1942). Measured against all of Nassau County, it is worth more than 4% 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 18 Jefferson St, Freeport, NY?

The 2025 property tax bill for 18 Jefferson St, Freeport, NY was $6,312. The county assessed it at $296.

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