Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$374,314$237 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

21 RIVER ST

CONWAY, MA 01341
4
Beds
1
Baths
1,582 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1825
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$374K
$348K low$401K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,519 (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.$243,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$72,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$171,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$325,518

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.72 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%

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.Conventional
CountyFRANKLIN
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.0.15
ConstructionThe main material the home's frame and walls are built from.Stone
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Conway GrammarB+
Elementary · Grades PK–6 · 1.4 mi
M
Frontier RegionalC
Middle · Grades 7–12 · 5.1 mi

District: Frontier School District

Neighborhood · ZIP 01341These 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.159
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 100.55

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.6%
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.1,653
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.46 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$92,523
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$124,896
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.50%

Owner Tools

Do you own this home?
Claim this home

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 80% of homes in Conway 01341
  • Costs less per square foot than 75% of homes in Conway 01341
  • Among the smallest lots in Conway 01341
  • Older than 96% of homes in Conway 01341

What homes are worth in Conway 01341

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

This home
$252K$1M

This home is worth more than 20% of homes in Conway 01341.

How it measures up in Conway 01341

The dot is this home. The mark in the middle is the typical home in Conway 01341.

Estimated value$374,314
CheaperTypical $493,336Pricier

Pricier than 20% of homes nearby

Price per ft²$237
CheaperTypical $283Pricier

Pricier than 25% of homes nearby

Living area1,582 ft²
SmallerTypical 1,804 ft²Bigger

Bigger than 36% of homes nearby

Lot size0.15 ac
SmallerTypical 3.6 acBigger

Smaller than almost all homes nearby

Year built1825
OlderTypical 1978Newer

Newer than 4% of homes nearby

How 21 River St ranks against every home in each area.
MeasureThis homeConway 01341Franklin County
Estimated valuepricier than$374,31420% of homes55% of homes
Price per ft²pricier than$23725% of homes54% of homes
Living areabigger than1,582 ft²36% of homes47% of homes
Lot sizebigger than0.15 acalmost no homes5% of homes
Year builtnewer than18254% of homes4% of homes

About 21 River St

How much is 21 River St, Conway, MA worth?

The TopHap Estimate for 21 River St, Conway, MA is $374,314 as of Oct 21, 2026. The likely range is $348,127 to $400,501. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 River St, Conway, MA last sell?

21 River St, Conway, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 River St, Conway, MA?

21 River St, Conway, MA has 4 bedrooms, 1 bathrooms, 1,582 square feet of living space and a 0.15-acre lot.

When was 21 River St, Conway, MA built?

21 River St, Conway, MA was built in 1825, making it 201 years old. It is a conventional home. The building has 1 story.

What schools serve 21 River St, Conway, MA?

21 River St, Conway, MA is assigned to Conway Grammar (elementary), rated B+; Frontier Regional (middle), rated C. All sit in Frontier School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 River St, Conway, MA compare to other homes in Conway 01341?

Among the 722 homes in Conway 01341, it is worth more than 20% of them ($374,314 against a typical $493,336), its price per square foot is higher than 25% of them ($237 against a typical $283), it is bigger than 36% of them (1,582 ft² against a typical 1,804 ft²), its lot is bigger than almost none of them (0.15 ac against a typical 3.6 ac) and it is newer than 4% of them (1825 against a typical 1978). Measured against all of Franklin County, it is worth more than 55% 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, Conway, MA?

The 2025 property tax bill for 21 River St, Conway, MA was $3,519. The county assessed it at $243,700.

More homes on River St

Closest homes

More homes in Conway 01341

Assigned schools

Explore the area

See this home in context

Open 21 River St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map