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Single Family ResidenceResidential
$6,892,776$573 / 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 78How 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 $6,000,000 on Feb 10, 2014

375 MILL RIVER RD

OYSTER BAY, NY 11771
8.5
Baths
12,039 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.
4 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
18
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$6.9M
$5.3M low$8.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$6,000,000 · Feb 10, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$60,599 (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.$3,231 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$677
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,554
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,615
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$3,231,000

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.27 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Mansion
CountyNASSAU
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
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.Yes
ViewThe type of view from the property, or another feature of the site that affects value.Private Road
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.ElevatorPatio · 2,012 ft²Porch · 136 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 · 1.9 mi
M
Oyster Bay Middle SchoolA
Middle · Grades 7–8 · 2.0 mi
H
Oyster Bay High SchoolB+
High · Grades 9–12 · 2.0 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

375 Mill River Rd 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 most valuable homes in Nassau County
  • Costs more per square foot than 67% of homes in Nassau County
  • Among the largest homes in Nassau County
  • Among the largest lots in Nassau County
  • Newer than 94% of homes in Oyster Bay 11771

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 98% 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$6,892,776
CheaperTypical $1,379,852Pricier

Pricier than 98% of homes nearby

Price per ft²$573
CheaperTypical $534Pricier

Pricier than 61% of homes nearby

Living area12,039 ft²
SmallerTypical 2,516 ft²Bigger

Bigger than almost all homes nearby

Lot size4 ac
SmallerTypical 0.29 acBigger

Bigger than 92% of homes nearby

Year built2002
OlderTypical 1958Newer

Newer than 94% of homes nearby

How 375 Mill River Rd ranks against every home in each area.
MeasureThis homeOyster Bay 11771Nassau County
Estimated valuepricier than$6,892,77698% of homesalmost all homes
Price per ft²pricier than$57361% of homes67% of homes
Living areabigger than12,039 ft²almost all homesalmost all homes
Lot sizebigger than4 ac92% of homesalmost all homes
Year builtnewer than200294% of homes94% of homes

About 375 Mill River Rd

How much is 375 Mill River Rd, Oyster Bay, NY worth?

The TopHap Estimate for 375 Mill River Rd, Oyster Bay, NY is $6,892,776 as of Sep 24, 2026. The likely range is $5,343,113 to $8,442,439. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 375 Mill River Rd, Oyster Bay, NY last sell?

375 Mill River Rd, Oyster Bay, NY last sold on Feb 10, 2014 for $6,000,000, according to the county's recorded deed.

How big is 375 Mill River Rd, Oyster Bay, NY?

375 Mill River Rd, Oyster Bay, NY has 8.5 bathrooms and 12,039 square feet of living space.

When was 375 Mill River Rd, Oyster Bay, NY built?

375 Mill River Rd, Oyster Bay, NY was built in 2002, making it 24 years old. It is a mansion home. The building has 2 stories.

What schools serve 375 Mill River Rd, Oyster Bay, NY?

375 Mill River Rd, 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 375 Mill River Rd, 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 98% of them ($6,892,776 against a typical $1,379,852), its price per square foot is higher than 61% of them ($573 against a typical $534), it is bigger than almost all of them (12,039 ft² against a typical 2,516 ft²), its lot is bigger than 92% of them (4 ac against a typical 0.29 ac) and it is newer than 94% of them (2002 against a typical 1958). Measured against all of Nassau County, it is worth more than almost all 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 375 Mill River Rd, Oyster Bay, NY?

The 2025 property tax bill for 375 Mill River Rd, Oyster Bay, NY was $60,599. The county assessed it at $3,231.

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