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Single Family ResidenceResidential
$616,193$401 / 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 95How 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
Last sold for $627,000 on Jun 15, 2011

23 BIG ROCK LOOP

KATONAH, NY 10536
3
Beds
0
Baths
1,537 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.
0.89 ac
Lot SizeThe size of the land the home sits on, from county records.
1930
Year BuiltThe year the home was originally built, according to county records.

Valuation

$616K
$586K low$646K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$627,000 · Jun 15, 2011

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,222 (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.$30,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$23,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$491,228

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.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
23
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.
95
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.
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.Split Level
CountyWESTCHESTER
Lot (acres)The size of the land the home sits on, from county records.0.89
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Increase Miller Elementary SchoolA
Elementary · Grades KG–5 · 1.0 mi
H
John Jay High SchoolA
High · Grades 9–12 · 2.3 mi
M
John Jay Middle SchoolA
Middle · Grades 6–8 · 2.4 mi

District: Katonah-Lewisboro Union Free 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

23 Big Rock Loop 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 98% of homes in Katonah 10536
  • Costs less per square foot than 83% of homes in Westchester County
  • Smaller than 91% of homes in Katonah 10536
  • Has a bigger lot than 84% of homes in Westchester County
  • Older than 93% of homes in Katonah 10536

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
$629K$4.3M

This home is worth more than 2% 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$616,193
CheaperTypical $1,117,752Pricier

Pricier than 2% of homes nearby

Price per ft²$401
CheaperTypical $409Pricier

Pricier than 46% of homes nearby

Living area1,537 ft²
SmallerTypical 2,768 ft²Bigger

Bigger than 9% of homes nearby

Lot size0.89 ac
SmallerTypical 1.84 acBigger

Bigger than 30% of homes nearby

Year built1930
OlderTypical 1972Newer

Newer than 7% of homes nearby

How 23 Big Rock Loop ranks against every home in each area.
MeasureThis homeKatonah 10536Westchester County
Estimated valuepricier than$616,1932% of homes22% of homes
Price per ft²pricier than$40146% of homes17% of homes
Living areabigger than1,537 ft²9% of homes26% of homes
Lot sizebigger than0.89 ac30% of homes84% of homes
Year builtnewer than19307% of homes29% of homes

About 23 Big Rock Loop

How much is 23 Big Rock Loop, Katonah, NY worth?

The TopHap Estimate for 23 Big Rock Loop, Katonah, NY is $616,193 as of Aug 30, 2026. The likely range is $586,345 to $646,041. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 23 Big Rock Loop, Katonah, NY last sell?

23 Big Rock Loop, Katonah, NY last sold on Jun 15, 2011 for $627,000, according to the county's recorded deed.

How big is 23 Big Rock Loop, Katonah, NY?

23 Big Rock Loop, Katonah, NY has 3 bedrooms, 1,537 square feet of living space and a 0.89-acre lot.

When was 23 Big Rock Loop, Katonah, NY built?

23 Big Rock Loop, Katonah, NY was built in 1930, making it 96 years old. It is a split level home.

What schools serve 23 Big Rock Loop, Katonah, NY?

23 Big Rock Loop, Katonah, NY is assigned to Increase Miller Elementary School (elementary), rated A; John Jay High School (high), rated A; John Jay Middle School (middle), 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 23 Big Rock Loop, Katonah, NY compare to other homes in Katonah 10536?

Among the 3,513 homes in Katonah 10536, it is worth more than 2% of them ($616,193 against a typical $1,117,752), its price per square foot is higher than 46% of them ($401 against a typical $409), it is bigger than 9% of them (1,537 ft² against a typical 2,768 ft²), its lot is bigger than 30% of them (0.89 ac against a typical 1.84 ac) and it is newer than 7% of them (1930 against a typical 1972). Measured against all of Westchester County, it is worth more than 22% 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 23 Big Rock Loop, Katonah, NY?

The 2025 property tax bill for 23 Big Rock Loop, Katonah, NY was $2,222. The county assessed it at $30,800.

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