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Single Family ResidenceResidential
$5,937,475$3,446 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $7,750,000 on Oct 17, 2023

91 ROSE HILL RD

WATER MILL, NY 11976
3
Beds
2
Baths
1,723 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.
0.94 ac
Lot SizeThe size of the land the home sits on, from county records.
1991
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$5.9M
$5.4M low$6.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$7,750,000 · Oct 17, 2023

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.$4,530,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,193,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$337,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$7,191,905

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.185 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.79%
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.Mobile Home
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.94
HeatingThe type of heating system in the home.Hot Water
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, Detached
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.Waterfront
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 522 ft²Porch · 1,362 ft²

Transaction History(3)

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

91 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
  • Among the highest price per square foot in Suffolk County
  • Smaller than 88% of homes in Water Mill 11976
  • Has a bigger lot than 89% of homes in Suffolk County
  • Older than 89% of homes in Water Mill 11976

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
$1.2M$10M

This home is worth more than 56% 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$5,937,475
CheaperTypical $5,323,908Pricier

Pricier than 56% of homes nearby

Price per ft²$3446
CheaperTypical $1291Pricier

Pricier than 97% of homes nearby

Living area1,723 ft²
SmallerTypical 3,744 ft²Bigger

Bigger than 12% of homes nearby

Lot size0.94 ac
SmallerTypical 1.08 acBigger

Bigger than 36% of homes nearby

Year built1991
OlderTypical 2005Newer

Newer than 11% of homes nearby

How 91 Rose Hill Rd ranks against every home in each area.
MeasureThis homeWater Mill 11976Suffolk County
Estimated valuepricier than$5,937,47556% of homesalmost all homes
Price per ft²pricier than$344697% of homesalmost all homes
Living areabigger than1,723 ft²12% of homes53% of homes
Lot sizebigger than0.94 ac36% of homes89% of homes
Year builtnewer than199111% of homes77% of homes

About 91 Rose Hill Rd

How much is 91 Rose Hill Rd, Water Mill, NY worth?

The TopHap Estimate for 91 Rose Hill Rd, Water Mill, NY is $5,937,475 as of Oct 21, 2026. The likely range is $5,448,099 to $6,426,852. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 91 Rose Hill Rd, Water Mill, NY last sell?

91 Rose Hill Rd, Water Mill, NY last sold on Oct 17, 2023 for $7,750,000, according to the county's recorded deed.

How big is 91 Rose Hill Rd, Water Mill, NY?

91 Rose Hill Rd, Water Mill, NY has 3 bedrooms, 2 bathrooms, 1,723 square feet of living space and a 0.94-acre lot.

When was 91 Rose Hill Rd, Water Mill, NY built?

91 Rose Hill Rd, Water Mill, NY was built in 1991, making it 35 years old. It is a mobile home home. The building has 1 story.

What schools serve 91 Rose Hill Rd, Water Mill, NY?

91 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 91 Rose Hill Rd, Water Mill, NY compare to other homes in Water Mill 11976?

Among the 2,246 homes in Water Mill 11976, it is worth more than 56% of them ($5,937,475 against a typical $5,323,908), its price per square foot is higher than 97% of them ($3446 against a typical $1291), it is bigger than 12% of them (1,723 ft² against a typical 3,744 ft²), its lot is bigger than 36% of them (0.94 ac against a typical 1.08 ac) and it is newer than 11% of them (1991 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.

More homes on Rose Hill Rd

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Assigned schools

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