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Single Family ResidenceResidential
$7,331,054$1,482 / 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 90How 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 $2,150,000 on May 8, 2012

89 ROSE HILL RD

WATER MILL, NY 11976
5
Beds
4
Baths
4,946 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.
1.16 ac
Lot SizeThe size of the land the home sits on, from county records.
2015
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$7.3M
$6.6M low$8.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,150,000 · May 8, 2012

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$4,231,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,299,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,931,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$6,716,825

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.13 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.Mobile Home
CountySUFFOLK
HeatingThe type of heating system in the home.Yes
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, Basement
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.Inferior
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 1,320 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.

H
Southampton High SchoolC+
High · Grades 9–12 · 2.6 mi
M
Southampton Intermediate SchoolC
Middle · Grades 5–8 · 2.7 mi
E
Southampton Elementary SchoolC
Elementary · Grades PK–4 · 3.2 mi

District: Southampton Union Free School District

Neighborhood · ZIP 11976These 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.184
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.49

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.48%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.46%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.3,431
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.205 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$171,191
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$251,712
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

89 Rose Hill 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 Suffolk County
  • Costs more per square foot than 98% of homes in Suffolk County
  • Bigger than 98% of homes in Suffolk County
  • Has a bigger lot than 94% of homes in Suffolk County
  • Newer than 97% of homes in Suffolk County

What homes are worth in Water Mill 11976

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

This home
$1.3M$10M

This home is worth more than 67% of homes in Water Mill 11976.

How it measures up in Water Mill 11976

The dot is this home. The mark in the middle is the typical home in Water Mill 11976.

Estimated value$7,331,054
CheaperTypical $5,382,916Pricier

Pricier than 67% of homes nearby

Price per ft²$1482
CheaperTypical $1320Pricier

Pricier than 62% of homes nearby

Living area4,946 ft²
SmallerTypical 3,750 ft²Bigger

Bigger than 66% of homes nearby

Lot size1.16 ac
SmallerTypical 1.07 acBigger

Bigger than 55% of homes nearby

Year built2015
OlderTypical 2005Newer

Newer than 80% of homes nearby

How 89 Rose Hill Rd ranks against every home in each area.
MeasureThis homeWater Mill 11976Suffolk County
Estimated valuepricier than$7,331,05467% of homesalmost all homes
Price per ft²pricier than$148262% of homes98% of homes
Living areabigger than4,946 ft²66% of homes98% of homes
Lot sizebigger than1.16 ac55% of homes94% of homes
Year builtnewer than201580% of homes97% of homes

About 89 Rose Hill Rd

How much is 89 Rose Hill Rd, Water Mill, NY worth?

The TopHap Estimate for 89 Rose Hill Rd, Water Mill, NY is $7,331,054 as of Sep 24, 2026. The likely range is $6,600,256 to $8,061,852. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 89 Rose Hill Rd, Water Mill, NY last sell?

89 Rose Hill Rd, Water Mill, NY last sold on May 8, 2012 for $2,150,000, according to the county's recorded deed.

How big is 89 Rose Hill Rd, Water Mill, NY?

89 Rose Hill Rd, Water Mill, NY has 5 bedrooms, 4 bathrooms and 4,946 square feet of living space.

When was 89 Rose Hill Rd, Water Mill, NY built?

89 Rose Hill Rd, Water Mill, NY was built in 2015, making it 11 years old. It is a mobile home home. The building has 2 stories.

What schools serve 89 Rose Hill Rd, Water Mill, NY?

89 Rose Hill Rd, Water Mill, NY is assigned to Southampton High School (high), rated C+; Southampton Intermediate School (middle), rated C; Southampton Elementary School (elementary), rated C. All sit in Southampton Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 89 Rose Hill Rd, Water Mill, NY compare to other homes in Water Mill 11976?

Among the 2,244 homes in Water Mill 11976, it is worth more than 67% of them ($7,331,054 against a typical $5,382,916), its price per square foot is higher than 62% of them ($1482 against a typical $1320), it is bigger than 66% of them (4,946 ft² against a typical 3,750 ft²), its lot is bigger than 55% of them (1.16 ac against a typical 1.07 ac) and it is newer than 80% of them (2015 against a typical 2005). Measured against all of Suffolk 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.

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Assigned schools

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