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Single Family ResidenceResidential
$977,731$364 / 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 Aug 30, 2026

138 ROUTE 100

KATONAH, NY 10536
4
Baths
2,688 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.
3.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$978K
$903K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$18,544 (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.$80,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$17,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$62,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$80,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$903,955

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.42
11
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
27
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
64
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
94
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
16
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.6%
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.Colonial
CountyWESTCHESTER
Lot (acres)The size of the land the home sits on, from county records.3.50
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Primrose School
Elementary · Grades PK–2 · 1.9 mi
H
Somers Senior High SchoolA-
High · Grades 9–12 · 2.0 mi
M
Somers Middle SchoolB+
Middle · Grades 6–8 · 3.0 mi

District: Somers Central School District

Neighborhood · ZIP 10536These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.97

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.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.11,674
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.392 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$198,874
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$242,041
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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

138 Route 100 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 less than 65% of homes in Katonah 10536
  • Costs less per square foot than 91% of homes in Westchester County
  • Bigger than 70% of homes in Westchester County
  • Has a bigger lot than 97% of homes in Westchester County
  • Newer than 67% of homes in Westchester County

What homes are worth in Katonah 10536

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

This home
$627K$4.2M

This home is worth more than 35% of homes in Katonah 10536.

How it measures up in Katonah 10536

The dot is this home. The mark in the middle is the typical home in Katonah 10536.

Estimated value$977,731
CheaperTypical $1,118,601Pricier

Pricier than 35% of homes nearby

Price per ft²$364
CheaperTypical $408Pricier

Pricier than 22% of homes nearby

Living area2,688 ft²
SmallerTypical 2,768 ft²Bigger

Bigger than 47% of homes nearby

Lot size3.5 ac
SmallerTypical 1.84 acBigger

Bigger than 82% of homes nearby

Year built1965
OlderTypical 1972Newer

Newer than 35% of homes nearby

How 138 Route 100 ranks against every home in each area.
MeasureThis homeKatonah 10536Westchester County
Estimated valuepricier than$977,73135% of homes58% of homes
Price per ft²pricier than$36422% of homes9% of homes
Living areabigger than2,688 ft²47% of homes70% of homes
Lot sizebigger than3.5 ac82% of homes97% of homes
Year builtnewer than196535% of homes67% of homes

About 138 Route 100

How much is 138 Route 100, Katonah, NY worth?

The TopHap Estimate for 138 Route 100, Katonah, NY is $977,731 as of Aug 30, 2026. The likely range is $902,672 to $1,052,790. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 138 Route 100, Katonah, NY last sell?

138 Route 100, Katonah, NY last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 138 Route 100, Katonah, NY?

138 Route 100, Katonah, NY has 4 bathrooms, 2,688 square feet of living space and a 3.50-acre lot.

When was 138 Route 100, Katonah, NY built?

138 Route 100, Katonah, NY was built in 1965, making it 61 years old. It is a colonial home. The building has 2 stories.

What schools serve 138 Route 100, Katonah, NY?

138 Route 100, Katonah, NY is assigned to Primrose School (elementary); Somers Senior High School (high), rated A-; Somers Middle School (middle), rated B+. All sit in Somers Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 138 Route 100, Katonah, NY compare to other homes in Katonah 10536?

Among the 3,513 homes in Katonah 10536, it is worth more than 35% of them ($977,731 against a typical $1,118,601), its price per square foot is higher than 22% of them ($364 against a typical $408), it is bigger than 47% of them (2,688 ft² against a typical 2,768 ft²), its lot is bigger than 82% of them (3.5 ac against a typical 1.84 ac) and it is newer than 35% of them (1965 against a typical 1972). Measured against all of Westchester County, it is worth more than 58% 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 138 Route 100, Katonah, NY?

The 2025 property tax bill for 138 Route 100, Katonah, NY was $18,544. The county assessed it at $80,000.

More homes on Route 100

Closest homes

More homes in Katonah 10536

Assigned schools

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