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Single Family ResidenceResidential
$1,753,855$478 / 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 89How 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 $1,500,000 on Jul 22, 2024

18 MILL RIVER RD

SOUTH SALEM, NY 10590
5
Beds
0
Baths
3,669 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.
7.65 ac
Lot SizeThe size of the land the home sits on, from county records.
1820
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$1.8M
$1.6M low$1.9M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,500,000 · Jul 22, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$32,379 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$99,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$34,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$65,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$99,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,585,327

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.51
36
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
20
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
61
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 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.Traditional/Old
CountyWESTCHESTER
Lot (acres)The size of the land the home sits on, from county records.7.65
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Meadow Pond Elementary SchoolA-
Elementary · Grades KG–5 · 1.1 mi
M
John Jay Middle SchoolA-
Middle · Grades 6–8 · 4.2 mi
H
John Jay High SchoolA
High · Grades 9–12 · 4.3 mi

District: Katonah-Lewisboro Union Free School District

Neighborhood · ZIP 10590These 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.73
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
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.6,260
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.447 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$178,158
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$223,069
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.52 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.55%

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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

18 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.

  • Worth more than 95% of homes in South Salem 10590
  • Bigger than 91% of homes in South Salem 10590
  • Among the largest lots in Westchester County
  • Among the oldest homes in Westchester County

What homes are worth in South Salem 10590

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

This home
$299K$2.2M

This home is worth more than 95% of homes in South Salem 10590.

How it measures up in South Salem 10590

The dot is this home. The mark in the middle is the typical home in South Salem 10590.

Estimated value$1,753,855
CheaperTypical $949,965Pricier

Pricier than 95% of homes nearby

Price per ft²$478
CheaperTypical $465Pricier

Pricier than 54% of homes nearby

Living area3,669 ft²
SmallerTypical 2,098 ft²Bigger

Bigger than 91% of homes nearby

Lot size7.65 ac
SmallerTypical 1.12 acBigger

Bigger than 97% of homes nearby

Year built1820
OlderTypical 1969Newer

Older than almost all homes nearby

How 18 Mill River Rd ranks against every home in each area.
MeasureThis homeSouth Salem 10590Westchester County
Estimated valuepricier than$1,753,85595% of homes85% of homes
Price per ft²pricier than$47854% of homes40% of homes
Living areabigger than3,669 ft²91% of homes87% of homes
Lot sizebigger than7.65 ac97% of homesalmost all homes
Year builtnewer than1820almost no homesalmost no homes

About 18 Mill River Rd

How much is 18 Mill River Rd, South Salem, NY worth?

The TopHap Estimate for 18 Mill River Rd, South Salem, NY is $1,753,855 as of Oct 21, 2026. The likely range is $1,558,123 to $1,949,587. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Mill River Rd, South Salem, NY last sell?

18 Mill River Rd, South Salem, NY last sold on Jul 22, 2024 for $1,500,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18 Mill River Rd, South Salem, NY?

18 Mill River Rd, South Salem, NY has 5 bedrooms, 3,669 square feet of living space and a 7.65-acre lot.

When was 18 Mill River Rd, South Salem, NY built?

18 Mill River Rd, South Salem, NY was built in 1820, making it 206 years old. It is a traditional/old home. The building has 1 story.

What schools serve 18 Mill River Rd, South Salem, NY?

18 Mill River Rd, South Salem, NY is assigned to Meadow Pond Elementary School (elementary), rated A-; John Jay Middle School (middle), rated A-; John Jay High School (high), rated A. All sit in Katonah-Lewisboro Union Free School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Mill River Rd, South Salem, NY compare to other homes in South Salem 10590?

Among the 2,705 homes in South Salem 10590, it is worth more than 95% of them ($1,753,855 against a typical $949,965), its price per square foot is higher than 54% of them ($478 against a typical $465), it is bigger than 91% of them (3,669 ft² against a typical 2,098 ft²), its lot is bigger than 97% of them (7.65 ac against a typical 1.12 ac) and it is newer than almost none of them (1820 against a typical 1969). Measured against all of Westchester County, it is worth more than 85% 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 18 Mill River Rd, South Salem, NY?

The 2026 property tax bill for 18 Mill River Rd, South Salem, NY was $32,379. The county assessed it at $99,400.

More homes on Mill River Rd

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