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Single Family ResidenceResidential
$625,863$476 / 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
Last sold for $412,850 on Dec 3, 2018

12 MOUNT AVE

FREEPORT, NY 11520
2.5
Baths
1,316 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1908
Year BuiltThe year the home was originally built, according to county records.
2
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

$626K
$590K low$662K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$412,850 · Dec 3, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,901 (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.$351 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$147
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$204
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$351
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$351,000

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.52 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.72%
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
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.0.15
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.Patio · 288 ft²Porch · 84 ft²

Transaction History(4)

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(5)

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

M
John W Dodd Middle SchoolC+
Middle · Grades 7–8 · 0.3 mi
E
New Visions Elementary SchoolA-
Elementary · Grades KG–4 · 0.5 mi
H
Freeport High SchoolC-
High · Grades 9–12 · 1.2 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

12 Mount 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.

  • Worth less than 90% of homes in Nassau County
  • Costs more per square foot than 83% of homes in Freeport 11520
  • Smaller than 79% of homes in Nassau County
  • Older than 98% of homes in Nassau County

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
$389K$923K

This home is worth more than 44% 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$625,863
CheaperTypical $641,770Pricier

Pricier than 44% of homes nearby

Price per ft²$476
CheaperTypical $407Pricier

Pricier than 83% of homes nearby

Living area1,316 ft²
SmallerTypical 1,636 ft²Bigger

Bigger than 24% of homes nearby

Lot size0.15 ac
SmallerTypical 0.14 acBigger

Bigger than 54% of homes nearby

Year built1908
OlderTypical 1941Newer

Newer than 7% of homes nearby

How 12 Mount Ave ranks against every home in each area.
MeasureThis homeFreeport 11520Nassau County
Estimated valuepricier than$625,86344% of homes10% of homes
Price per ft²pricier than$47683% of homes36% of homes
Living areabigger than1,316 ft²24% of homes21% of homes
Lot sizebigger than0.15 ac54% of homes52% of homes
Year builtnewer than19087% of homes2% of homes

About 12 Mount Ave

How much is 12 Mount Ave, Freeport, NY worth?

The TopHap Estimate for 12 Mount Ave, Freeport, NY is $625,863 as of Aug 30, 2026. The likely range is $589,808 to $661,918. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12 Mount Ave, Freeport, NY last sell?

12 Mount Ave, Freeport, NY last sold on Dec 3, 2018 for $412,850, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 12 Mount Ave, Freeport, NY?

12 Mount Ave, Freeport, NY has 2.5 bathrooms, 1,316 square feet of living space and a 0.15-acre lot.

When was 12 Mount Ave, Freeport, NY built?

12 Mount Ave, Freeport, NY was built in 1908, making it 118 years old. It is a colonial home. The building has 2 stories.

What schools serve 12 Mount Ave, Freeport, NY?

12 Mount Ave, Freeport, NY is assigned to John W Dodd Middle School (middle), rated C+; New Visions Elementary School (elementary), rated A-; 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 12 Mount Ave, Freeport, NY compare to other homes in Freeport 11520?

Among the 9,174 homes in Freeport 11520, it is worth more than 44% of them ($625,863 against a typical $641,770), its price per square foot is higher than 83% of them ($476 against a typical $407), it is bigger than 24% of them (1,316 ft² against a typical 1,636 ft²), its lot is bigger than 54% of them (0.15 ac against a typical 0.14 ac) and it is newer than 7% of them (1908 against a typical 1941). Measured against all of Nassau County, it is worth more than 10% 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 12 Mount Ave, Freeport, NY?

The 2025 property tax bill for 12 Mount Ave, Freeport, NY was $3,901. The county assessed it at $351.

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