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Single Family ResidenceResidential
$85,007$28 / 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 73How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $73,500 on Jul 27, 2020

21 RIVER ST

FORT PLAIN, NY 13339
5
Beds
1.5
Baths
3,061 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1875
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$85K
$62K low$108K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$73,500 · Jul 27, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,939 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$61,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$53,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$61,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$90,294

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.55 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 percent flood zone

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
CountyMONTGOMERY
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.1950
Lot (acres)The size of the land the home sits on, from county records.0.19
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
GarageWhether the property has a garage, and details like whether it is attached to the home.Mixed
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 · 286 ft²

Transaction History(3)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

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

M
Fort Plain Junior-Senior High SchoolC+
Middle · Grades 7–12 · 0.5 mi
E
Harry Hoag SchoolD+
Elementary · Grades PK–6 · 0.7 mi

District: Fort Plain Central School District

Neighborhood · ZIP 13339These 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.117
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 100.61

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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.11%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.7,366
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.70 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$62,683
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$75,469
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.42 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.51%

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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

21 River St 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 94% of homes in Montgomery County
  • Among the lowest price per square foot in Montgomery County
  • Bigger than 95% of homes in Montgomery County
  • Has a smaller lot than 85% of homes in Fort Plain 13339
  • Older than 91% of homes in Montgomery County

What homes are worth in Fort Plain 13339

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

This home
$47K$582K

This home is worth more than 14% of homes in Fort Plain 13339.

How it measures up in Fort Plain 13339

The dot is this home. The mark in the middle is the typical home in Fort Plain 13339.

Estimated value$85,007
CheaperTypical $155,674Pricier

Pricier than 14% of homes nearby

Price per ft²$28
CheaperTypical $101Pricier

Pricier than 2% of homes nearby

Living area3,061 ft²
SmallerTypical 1,568 ft²Bigger

Bigger than 93% of homes nearby

Lot size0.19 ac
SmallerTypical 1.5 acBigger

Bigger than 15% of homes nearby

Year built1875
OlderTypical 1952Newer

Newer than 15% of homes nearby

How 21 River St ranks against every home in each area.
MeasureThis homeFort Plain 13339Montgomery County
Estimated valuepricier than$85,00714% of homes6% of homes
Price per ft²pricier than$282% of homesalmost no homes
Living areabigger than3,061 ft²93% of homes95% of homes
Lot sizebigger than0.19 ac15% of homes28% of homes
Year builtnewer than187515% of homes9% of homes

About 21 River St

How much is 21 River St, Fort Plain, NY worth?

The TopHap Estimate for 21 River St, Fort Plain, NY is $85,007 as of Sep 24, 2026. The likely range is $62,477 to $107,537. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 River St, Fort Plain, NY last sell?

21 River St, Fort Plain, NY last sold on Jul 27, 2020 for $73,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 River St, Fort Plain, NY?

21 River St, Fort Plain, NY has 5 bedrooms, 1.5 bathrooms, 3,061 square feet of living space and a 0.19-acre lot.

When was 21 River St, Fort Plain, NY built?

21 River St, Fort Plain, NY was built in 1875, making it 151 years old. It is a traditional/old home. The building has 2 stories.

What schools serve 21 River St, Fort Plain, NY?

21 River St, Fort Plain, NY is assigned to Fort Plain Junior-Senior High School (middle), rated C+; Harry Hoag School (elementary), rated D+. All sit in Fort Plain Central School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 River St, Fort Plain, NY compare to other homes in Fort Plain 13339?

Among the 2,506 homes in Fort Plain 13339, it is worth more than 14% of them ($85,007 against a typical $155,674), its price per square foot is higher than 2% of them ($28 against a typical $101), it is bigger than 93% of them (3,061 ft² against a typical 1,568 ft²), its lot is bigger than 15% of them (0.19 ac against a typical 1.5 ac) and it is newer than 15% of them (1875 against a typical 1952). Measured against all of Montgomery County, it is worth more than 6% 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 21 River St, Fort Plain, NY?

The 2026 property tax bill for 21 River St, Fort Plain, NY was $2,939. The county assessed it at $61,400.

More homes on River St

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Assigned schools

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