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Single Family ResidenceResidential
$420,367$313 / 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 Jul 14, 2026
Last sold for $126,000 on Nov 14, 2000

78 RIVER AVE

OYSTER BAY, NY 11771
3
Beds
2
Baths
1,344 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.
0.35 ac
Lot SizeThe size of the land the home sits on, from county records.
1910
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

$420K
$382K low$459K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$126,000 · Nov 14, 2000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,863 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$1,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$229,167

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.35
HeatingThe type of heating system in the home.Radiant
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Waterfront

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

E
River Elementary SchoolC
Elementary · Grades PK–5 · 0.1 mi
M
South Ocean Middle SchoolC
Middle · Grades 6–8 · 0.6 mi
H
Patchogue-Medford High SchoolC+
High · Grades 9–12 · 3.7 mi

District: Patchogue-Medford Union Free 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

78 River 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.

  • Among the least valuable homes in Oyster Bay 11771
  • Costs less per square foot than 98% of homes in Oyster Bay 11771
  • Smaller than 92% of homes in Oyster Bay 11771
  • Older than 98% of homes in Suffolk County

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
$713K$6.1M

This home is worth less than almost all 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$420,367
CheaperTypical $1,505,171Pricier

Cheaper than almost all homes nearby

Price per ft²$313
CheaperTypical $576Pricier

Pricier than 2% of homes nearby

Living area1,344 ft²
SmallerTypical 2,522 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.35 ac
SmallerTypical 0.29 acBigger

Bigger than 54% of homes nearby

Year built1910
OlderTypical 1958Newer

Newer than 15% of homes nearby

How 78 River Ave ranks against every home in each area.
MeasureThis homeOyster Bay 11771Suffolk County
Estimated valuepricier than$420,367almost no homes4% of homes
Price per ft²pricier than$3132% of homes13% of homes
Living areabigger than1,344 ft²8% of homes31% of homes
Lot sizebigger than0.35 ac54% of homes61% of homes
Year builtnewer than191015% of homes2% of homes

About 78 River Ave

How much is 78 River Ave, Oyster Bay, NY worth?

The TopHap Estimate for 78 River Ave, Oyster Bay, NY is $420,367 as of Jul 14, 2026. The likely range is $381,555 to $459,179. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 78 River Ave, Oyster Bay, NY last sell?

78 River Ave, Oyster Bay, NY last sold on Nov 14, 2000 for $126,000, according to the county's recorded deed.

How big is 78 River Ave, Oyster Bay, NY?

78 River Ave, Oyster Bay, NY has 3 bedrooms, 2 bathrooms, 1,344 square feet of living space and a 0.35-acre lot.

When was 78 River Ave, Oyster Bay, NY built?

78 River Ave, Oyster Bay, NY was built in 1910, making it 116 years old. The building has 2 stories.

What schools serve 78 River Ave, Oyster Bay, NY?

78 River Ave, Oyster Bay, NY is assigned to River Elementary School (elementary), rated C; South Ocean Middle School (middle), rated C; Patchogue-Medford High School (high), rated C+. All sit in Patchogue-Medford Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 78 River Ave, 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 almost none of them ($420,367 against a typical $1,505,171), its price per square foot is higher than 2% of them ($313 against a typical $576), it is bigger than 8% of them (1,344 ft² against a typical 2,522 ft²), its lot is bigger than 54% of them (0.35 ac against a typical 0.29 ac) and it is newer than 15% of them (1910 against a typical 1958). Measured against all of Suffolk 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 78 River Ave, Oyster Bay, NY?

The 2024 property tax bill for 78 River Ave, Oyster Bay, NY was $6,863. The county assessed it at $1,100.

Closest homes

More homes in Oyster Bay 11771

Assigned schools

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