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Single Family ResidenceResidential
$394,521$167 / 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 Jul 14, 2026

639 ALEXANDER DR

ROTTERDAM JUNCTION, NY 12150
4
Beds
3 / 1
Baths
2,358 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.
0.3 ac
Lot SizeThe size of the land the home sits on, from county records.
1980
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

$395K
$363K low$426K high

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.$240,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$232,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$240,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$369,200

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.35
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
12
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
62
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
88
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
12
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.Cape Cod
CountySchenectady
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1985
Lot (acres)The size of the land the home sits on, from county records.0.30
HeatingThe type of heating system in the home.Forced Air
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.In-Ground Vinyl Pool
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 300 ft²

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
Jefferson Elementary SchoolB
Elementary · Grades KG–4 · 6.6 mi
M
Schalmont Middle SchoolD+
Middle · Grades 5–8 · 6.9 mi
H
Schalmont High SchoolC+
High · Grades 9–12 · 7.0 mi

District: Schalmont Central School District

Neighborhood · ZIP 12150These 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.91
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.62

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.334
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.271 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$55,528
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$66,638
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.40 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%

Owner Tools

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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

639 Alexander Dr 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 90% of homes in Rotterdam Junction 12150
  • Costs less per square foot than 69% of homes in Schenectady County
  • Bigger than 86% of homes in Rotterdam Junction 12150
  • Newer than 81% of homes in Schenectady County

What homes are worth in Rotterdam Junction 12150

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

This home
$169K$489K

This home is worth more than 90% of homes in Rotterdam Junction 12150.

How it measures up in Rotterdam Junction 12150

The dot is this home. The mark in the middle is the typical home in Rotterdam Junction 12150.

Estimated value$394,521
CheaperTypical $253,969Pricier

Pricier than 90% of homes nearby

Price per ft²$167
CheaperTypical $175Pricier

Pricier than 42% of homes nearby

Living area2,358 ft²
SmallerTypical 1,642 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.3 ac
SmallerTypical 0.31 acBigger

Bigger than 49% of homes nearby

Year built1980
OlderTypical 1955Newer

Newer than 80% of homes nearby

How 639 Alexander Dr ranks against every home in each area.
MeasureThis homeRotterdam Junction 12150Schenectady County
Estimated valuepricier than$394,52190% of homes80% of homes
Price per ft²pricier than$16742% of homes31% of homes
Living areabigger than2,358 ft²86% of homes83% of homes
Lot sizebigger than0.3 ac49% of homes60% of homes
Year builtnewer than198080% of homes81% of homes

About 639 Alexander Dr

How much is 639 Alexander Dr, Rotterdam Junction, NY worth?

The TopHap Estimate for 639 Alexander Dr, Rotterdam Junction, NY is $394,521 as of Jul 14, 2026. The likely range is $363,009 to $426,033. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 639 Alexander Dr, Rotterdam Junction, NY?

639 Alexander Dr, Rotterdam Junction, NY has 4 bedrooms, 3 bathrooms, 2,358 square feet of living space and a 0.30-acre lot.

When was 639 Alexander Dr, Rotterdam Junction, NY built?

639 Alexander Dr, Rotterdam Junction, NY was built in 1980, making it 46 years old. It is a cape cod home. The building has 2 stories.

What schools serve 639 Alexander Dr, Rotterdam Junction, NY?

639 Alexander Dr, Rotterdam Junction, NY is assigned to Jefferson Elementary School (elementary), rated B; Schalmont Middle School (middle), rated D+; Schalmont High School (high), rated C+. All sit in Schalmont Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 639 Alexander Dr, Rotterdam Junction, NY compare to other homes in Rotterdam Junction 12150?

Among the 339 homes in Rotterdam Junction 12150, it is worth more than 90% of them ($394,521 against a typical $253,969), its price per square foot is higher than 42% of them ($167 against a typical $175), it is bigger than 86% of them (2,358 ft² against a typical 1,642 ft²), its lot is bigger than 49% of them (0.3 ac against a typical 0.31 ac) and it is newer than 80% of them (1980 against a typical 1955). Measured against all of Schenectady County, it is worth more than 80% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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