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Single Family ResidenceResidential
$786,062$339 / 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 84How 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 $239,000 on Sep 15, 1999

9 15TH ST

BAYVILLE, NY 11709
2
Baths
2,317 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1946
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
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

$786K
$662K low$910K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$239,000 · Sep 15, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,810 (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.$442 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$217
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$225
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$442
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$442,000

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.131 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.92%
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.Colonial
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.14
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
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 256 ft²Porch · 162 ft²

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

E
Bayville Primary School
Elementary · Grades PK–2 · 1.0 mi
H
Locust Valley High SchoolA-
High · Grades 9–12 · 2.7 mi
M
Locust Valley Middle SchoolA+
Middle · Grades 6–9 · 2.7 mi

District: Locust Valley Central School District

Neighborhood · ZIP 11709These 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.108
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 100.96

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.3,515
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,776 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$141,664
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$172,974
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

9 15th 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.

  • Costs less per square foot than 97% of homes in Bayville 11709
  • Bigger than 77% of homes in Nassau County
  • Has a smaller lot than 71% of homes in Nassau County
  • Older than 73% of homes in Nassau County

What homes are worth in Bayville 11709

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

This home
$480K$2M

This home is worth more than 43% of homes in Bayville 11709.

How it measures up in Bayville 11709

The dot is this home. The mark in the middle is the typical home in Bayville 11709.

Estimated value$786,062
CheaperTypical $823,323Pricier

Pricier than 43% of homes nearby

Price per ft²$339
CheaperTypical $474Pricier

Pricier than 3% of homes nearby

Living area2,317 ft²
SmallerTypical 1,845 ft²Bigger

Bigger than 74% of homes nearby

Lot size0.14 ac
SmallerTypical 0.16 acBigger

Bigger than 40% of homes nearby

Year built1946
OlderTypical 1958Newer

Newer than 28% of homes nearby

How 9 15th St ranks against every home in each area.
MeasureThis homeBayville 11709Nassau County
Estimated valuepricier than$786,06243% of homes42% of homes
Price per ft²pricier than$3393% of homes3% of homes
Living areabigger than2,317 ft²74% of homes77% of homes
Lot sizebigger than0.14 ac40% of homes29% of homes
Year builtnewer than194628% of homes27% of homes

About 9 15th St

How much is 9 15th St, Bayville, NY worth?

The TopHap Estimate for 9 15th St, Bayville, NY is $786,062 as of Sep 24, 2026. The likely range is $661,739 to $910,385. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9 15th St, Bayville, NY last sell?

9 15th St, Bayville, NY last sold on Sep 15, 1999 for $239,000, according to the county's recorded deed.

How big is 9 15th St, Bayville, NY?

9 15th St, Bayville, NY has 2 bathrooms, 2,317 square feet of living space and a 0.14-acre lot.

When was 9 15th St, Bayville, NY built?

9 15th St, Bayville, NY was built in 1946, making it 80 years old. It is a colonial home. The building has 2 stories.

What schools serve 9 15th St, Bayville, NY?

9 15th St, Bayville, NY is assigned to Bayville Primary School (elementary); Locust Valley High School (high), rated A-; Locust Valley Middle School (middle), rated A+. All sit in Locust Valley Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9 15th St, Bayville, NY compare to other homes in Bayville 11709?

Among the 2,434 homes in Bayville 11709, it is worth more than 43% of them ($786,062 against a typical $823,323), its price per square foot is higher than 3% of them ($339 against a typical $474), it is bigger than 74% of them (2,317 ft² against a typical 1,845 ft²), its lot is bigger than 40% of them (0.14 ac against a typical 0.16 ac) and it is newer than 28% of them (1946 against a typical 1958). Measured against all of Nassau County, it is worth more than 42% 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 9 15th St, Bayville, NY?

The 2025 property tax bill for 9 15th St, Bayville, NY was $2,810. The county assessed it at $442.

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Assigned schools

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