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Single Family ResidenceResidential
$944,091$735 / 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 91How 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 $440,000 on Jul 26, 2004

12 PROSPECT ST

OYSTER BAY, NY 11771
2
Baths
1,284 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.
1838
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$944K
$855K low$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.$440,000 · Jul 26, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,572 (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.$472 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$254
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$218
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$472
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$472,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.13
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 272 ft²Patio · 272 ft²

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
Theodore Roosevelt School
Elementary · Grades PK–2 · 0.2 mi
M
Oyster Bay Middle SchoolA
Middle · Grades 7–8 · 0.4 mi
H
Oyster Bay High SchoolB+
High · Grades 9–12 · 0.4 mi

District: Oyster Bay-East Norwich Central School District

Neighborhood · ZIP 11771These 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.119
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.92

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.11,584
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.763 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$154,579
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$198,115
Average tempThe average temperature here across a full year.52°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 Prospect 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 76% of homes in Oyster Bay 11771
  • Costs more per square foot than 95% of homes in Oyster Bay
  • Smaller than 93% of homes in Oyster Bay 11771
  • Has a smaller lot than 90% of homes in Oyster Bay 11771
  • Among the oldest homes in Oyster Bay

What homes are worth in Oyster Bay 11771

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

This home
$611K$6.8M

This home is worth more than 24% of homes in Oyster Bay 11771.

How it measures up in Oyster Bay 11771

The dot is this home. The mark in the middle is the typical home in Oyster Bay 11771.

Estimated value$944,091
CheaperTypical $1,372,827Pricier

Pricier than 24% of homes nearby

Price per ft²$735
CheaperTypical $535Pricier

Pricier than 88% of homes nearby

Living area1,284 ft²
SmallerTypical 2,519 ft²Bigger

Bigger than 7% of homes nearby

Lot size0.13 ac
SmallerTypical 0.29 acBigger

Bigger than 10% of homes nearby

Year built1838
OlderTypical 1958Newer

Older than almost all homes nearby

How 12 Prospect St ranks against every home in each area.
MeasureThis homeOyster BayOyster Bay 11771Nassau County
Estimated valuepricier than$944,09144% of homes24% of homes65% of homes
Price per ft²pricier than$73595% of homes88% of homes93% of homes
Living areabigger than1,284 ft²11% of homes7% of homes19% of homes
Lot sizebigger than0.13 ac18% of homes10% of homes26% of homes
Year builtnewer than1838almost no homesalmost no homesalmost no homes

About 12 Prospect St

How much is 12 Prospect St, Oyster Bay, NY worth?

The TopHap Estimate for 12 Prospect St, Oyster Bay, NY is $944,091 as of Sep 24, 2026. The likely range is $855,164 to $1,033,018. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12 Prospect St, Oyster Bay, NY last sell?

12 Prospect St, Oyster Bay, NY last sold on Jul 26, 2004 for $440,000, according to the county's recorded deed.

How big is 12 Prospect St, Oyster Bay, NY?

12 Prospect St, Oyster Bay, NY has 2 bathrooms, 1,284 square feet of living space and a 0.13-acre lot.

When was 12 Prospect St, Oyster Bay, NY built?

12 Prospect St, Oyster Bay, NY was built in 1838, making it 188 years old. The building has 1 story.

What schools serve 12 Prospect St, Oyster Bay, NY?

12 Prospect St, Oyster Bay, NY is assigned to Theodore Roosevelt School (elementary); Oyster Bay Middle School (middle), rated A; Oyster Bay High School (high), rated B+. All sit in Oyster Bay-East Norwich Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12 Prospect St, Oyster Bay, NY compare to other homes in Oyster Bay 11771?

Among the 3,028 homes in Oyster Bay 11771, it is worth more than 24% of them ($944,091 against a typical $1,372,827), its price per square foot is higher than 88% of them ($735 against a typical $535), it is bigger than 7% of them (1,284 ft² against a typical 2,519 ft²), its lot is bigger than 10% of them (0.13 ac against a typical 0.29 ac) and it is newer than almost none of them (1838 against a typical 1958). Measured against all of Nassau County, it is worth more than 65% 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 Prospect St, Oyster Bay, NY?

The 2025 property tax bill for 12 Prospect St, Oyster Bay, NY was $11,572. The county assessed it at $472.

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