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Single Family ResidenceResidential
$437,068$156 / 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 84How 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 $133,000 on Sep 16, 2010

18 PROSPECT AVE

ROUND LAKE, NY 12151
4
Beds
3 / 2
Baths
2,800 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1870
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$437K
$366K low$508K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$133,000 · Sep 16, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,549 (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.$459,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$14,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$445,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$425,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$459,000

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.32
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
4
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.
85
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
10
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
CountySARATOGA
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.2010
Lot (acres)The size of the land the home sits on, from county records.0.16
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 434 ft²

Transaction History(4)

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
Chango Elementary SchoolA-
Elementary · Grades KG–5 · 0.9 mi
M
Gowana Middle SchoolA-
Middle · Grades 6–8 · 4.8 mi
H
Shenendehowa High SchoolA-
High · Grades 9–12 · 5.0 mi

District: Shenendehowa Central School District

Neighborhood · ZIP 12151These 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.57
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.91%
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.6.3%
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.1,683
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.592 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,331
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,418
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.39 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

18 Prospect Ave 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 94% of homes in Round Lake 12151
  • Bigger than 95% of homes in Round Lake 12151
  • Has a smaller lot than 86% of homes in Saratoga County
  • Older than 96% of homes in Saratoga County

What homes are worth in Round Lake 12151

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

This home
$224K$633K

This home is worth more than 60% of homes in Round Lake 12151.

How it measures up in Round Lake 12151

The dot is this home. The mark in the middle is the typical home in Round Lake 12151.

Estimated value$437,068
CheaperTypical $375,258Pricier

Pricier than 60% of homes nearby

Price per ft²$156
CheaperTypical $245Pricier

Pricier than 6% of homes nearby

Living area2,800 ft²
SmallerTypical 1,752 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.16 ac
SmallerTypical 0.14 acBigger

Bigger than 54% of homes nearby

Year built1870
OlderTypical 1930Newer

Newer than 8% of homes nearby

How 18 Prospect Ave ranks against every home in each area.
MeasureThis homeRound Lake 12151Saratoga County
Estimated valuepricier than$437,06860% of homes50% of homes
Price per ft²pricier than$1566% of homes6% of homes
Living areabigger than2,800 ft²95% of homes90% of homes
Lot sizebigger than0.16 ac54% of homes14% of homes
Year builtnewer than18708% of homes4% of homes

About 18 Prospect Ave

How much is 18 Prospect Ave, Round Lake, NY worth?

The TopHap Estimate for 18 Prospect Ave, Round Lake, NY is $437,068 as of Aug 30, 2026. The likely range is $366,083 to $508,053. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Prospect Ave, Round Lake, NY last sell?

18 Prospect Ave, Round Lake, NY last sold on Sep 16, 2010 for $133,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18 Prospect Ave, Round Lake, NY?

18 Prospect Ave, Round Lake, NY has 4 bedrooms, 3 bathrooms, 2,800 square feet of living space and a 0.16-acre lot.

When was 18 Prospect Ave, Round Lake, NY built?

18 Prospect Ave, Round Lake, NY was built in 1870, making it 156 years old. It is a traditional/old home. The building has 2 stories.

What schools serve 18 Prospect Ave, Round Lake, NY?

18 Prospect Ave, Round Lake, NY is assigned to Chango Elementary School (elementary), rated A-; Gowana Middle School (middle), rated A-; Shenendehowa High School (high), rated A-. All sit in Shenendehowa Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Prospect Ave, Round Lake, NY compare to other homes in Round Lake 12151?

Among the 480 homes in Round Lake 12151, it is worth more than 60% of them ($437,068 against a typical $375,258), its price per square foot is higher than 6% of them ($156 against a typical $245), it is bigger than 95% of them (2,800 ft² against a typical 1,752 ft²), its lot is bigger than 54% of them (0.16 ac against a typical 0.14 ac) and it is newer than 8% of them (1870 against a typical 1930). Measured against all of Saratoga County, it is worth more than 50% 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 Prospect Ave, Round Lake, NY?

The 2025 property tax bill for 18 Prospect Ave, Round Lake, NY was $6,549. The county assessed it at $459,000.

More homes on Prospect Ave

Closest homes

More homes in Round Lake 12151

Assigned schools

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