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Single Family ResidenceResidential
$543,518$225 / 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 Jul 14, 2026

645 ROCK CITY RD

OLD CHATHAM, NY 12136
3
Beds
2
Baths
2,411 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.
5.64 ac
Lot SizeThe size of the land the home sits on, from county records.
1941
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$544K
$481K low$606K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,608 (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.$418,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$83,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$334,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$418,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$510,488

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.38
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
58
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
92
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
21
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
CountyColumbia
Lot (acres)The size of the land the home sits on, from county records.5.64
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 368 ft²

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

M
Chatham Middle SchoolC-
Middle · Grades 6–8 · 3.9 mi
E
Mary E Dardess Elementary SchoolC+
Elementary · Grades PK–5 · 4.1 mi
H
Chatham High SchoolB+
High · Grades 9–12 · 4.2 mi

District: Chatham Central School District

Neighborhood · ZIP 12136These 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.104
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.81
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

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.80%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.1,012
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.51 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$122,163
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,959
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.43 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%

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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

645 Rock City 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.

  • Costs less per square foot than 84% of homes in Old Chatham 12136
  • Bigger than 80% of homes in Columbia County
  • Has a bigger lot than 75% of homes in Columbia County
  • Older than 67% of homes in Columbia County

What homes are worth in Old Chatham 12136

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

This home
$262K$2.9M

This home is worth more than 40% of homes in Old Chatham 12136.

How it measures up in Old Chatham 12136

The dot is this home. The mark in the middle is the typical home in Old Chatham 12136.

Estimated value$543,518
CheaperTypical $596,695Pricier

Pricier than 40% of homes nearby

Price per ft²$225
CheaperTypical $316Pricier

Pricier than 16% of homes nearby

Living area2,411 ft²
SmallerTypical 2,024 ft²Bigger

Bigger than 68% of homes nearby

Lot size5.64 ac
SmallerTypical 6.39 acBigger

Bigger than 47% of homes nearby

Year built1941
OlderTypical 1971Newer

Newer than 36% of homes nearby

How 645 Rock City Rd ranks against every home in each area.
MeasureThis homeOld Chatham 12136Columbia County
Estimated valuepricier than$543,51840% of homes62% of homes
Price per ft²pricier than$22516% of homes22% of homes
Living areabigger than2,411 ft²68% of homes80% of homes
Lot sizebigger than5.64 ac47% of homes75% of homes
Year builtnewer than194136% of homes33% of homes

About 645 Rock City Rd

How much is 645 Rock City Rd, Old Chatham, NY worth?

The TopHap Estimate for 645 Rock City Rd, Old Chatham, NY is $543,518 as of Jul 14, 2026. The likely range is $481,236 to $605,800. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 645 Rock City Rd, Old Chatham, NY?

645 Rock City Rd, Old Chatham, NY has 3 bedrooms, 2 bathrooms, 2,411 square feet of living space and a 5.64-acre lot.

When was 645 Rock City Rd, Old Chatham, NY built?

645 Rock City Rd, Old Chatham, NY was built in 1941, making it 85 years old. It is a traditional/old home. The building has 2 stories.

What schools serve 645 Rock City Rd, Old Chatham, NY?

645 Rock City Rd, Old Chatham, NY is assigned to Chatham Middle School (middle), rated C-; Mary E Dardess Elementary School (elementary), rated C+; Chatham High School (high), rated B+. All sit in Chatham Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 645 Rock City Rd, Old Chatham, NY compare to other homes in Old Chatham 12136?

Among the 509 homes in Old Chatham 12136, it is worth more than 40% of them ($543,518 against a typical $596,695), its price per square foot is higher than 16% of them ($225 against a typical $316), it is bigger than 68% of them (2,411 ft² against a typical 2,024 ft²), its lot is bigger than 47% of them (5.64 ac against a typical 6.39 ac) and it is newer than 36% of them (1941 against a typical 1971). Measured against all of Columbia County, it is worth more than 62% 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 645 Rock City Rd, Old Chatham, NY?

The 2025 property tax bill for 645 Rock City Rd, Old Chatham, NY was $7,608. The county assessed it at $418,600.

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More homes in Old Chatham 12136

Assigned schools

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