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Single Family ResidenceResidential
$1,006,838$884 / 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 88How 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

643 RIVER RD

WESTPORT, MA 02790
3
Beds
1.5
Baths
1,139 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.
1.8 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$890K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,235 (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.$856,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$725,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$130,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$769,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,327,025

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

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.Ranch
CountyBRISTOL
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.1976
Lot (acres)The size of the land the home sits on, from county records.1.80
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

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

M
Westport Middle-High SchoolC
Middle · Grades 5–12 · 7.4 mi
E
Westport Elementary SchoolC
Elementary · Grades 1–4 · 7.6 mi

District: Westport School District

Neighborhood · ZIP 02790These 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.76
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.2%
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.17,394
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.$94,082
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,569
Average tempThe average temperature here across a full year.50°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.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

643 River 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.

  • Worth more than 96% of homes in Bristol County
  • Among the highest price per square foot in Bristol County
  • Smaller than 84% of homes in Westport 02790
  • Has a bigger lot than 88% of homes in Bristol County
  • Older than 89% of homes in Westport 02790

What homes are worth in Westport 02790

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

This home
$340K$2.4M

This home is worth more than 81% of homes in Westport 02790.

How it measures up in Westport 02790

The dot is this home. The mark in the middle is the typical home in Westport 02790.

Estimated value$1,006,838
CheaperTypical $636,139Pricier

Pricier than 81% of homes nearby

Price per ft²$884
CheaperTypical $375Pricier

Pricier than 96% of homes nearby

Living area1,139 ft²
SmallerTypical 1,760 ft²Bigger

Bigger than 16% of homes nearby

Lot size1.8 ac
SmallerTypical 1 acBigger

Bigger than 75% of homes nearby

Year built1920
OlderTypical 1972Newer

Newer than 11% of homes nearby

How 643 River Rd ranks against every home in each area.
MeasureThis homeWestport 02790Bristol County
Estimated valuepricier than$1,006,83881% of homes96% of homes
Price per ft²pricier than$88496% of homesalmost all homes
Living areabigger than1,139 ft²16% of homes19% of homes
Lot sizebigger than1.8 ac75% of homes88% of homes
Year builtnewer than192011% of homes22% of homes

About 643 River Rd

How much is 643 River Rd, Westport, MA worth?

The TopHap Estimate for 643 River Rd, Westport, MA is $1,006,838 as of Oct 21, 2026. The likely range is $889,559 to $1,124,117. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 643 River Rd, Westport, MA last sell?

643 River Rd, Westport, MA last sold on May 4, 2015, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 643 River Rd, Westport, MA?

643 River Rd, Westport, MA has 3 bedrooms, 1.5 bathrooms, 1,139 square feet of living space and a 1.80-acre lot.

When was 643 River Rd, Westport, MA built?

643 River Rd, Westport, MA was built in 1920, making it 106 years old. It is a ranch home. The building has 2 stories.

What schools serve 643 River Rd, Westport, MA?

643 River Rd, Westport, MA is assigned to Westport Middle-High School (middle), rated C; Westport Elementary School (elementary), rated C. All sit in Westport School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 643 River Rd, Westport, MA compare to other homes in Westport 02790?

Among the 7,200 homes in Westport 02790, it is worth more than 81% of them ($1,006,838 against a typical $636,139), its price per square foot is higher than 96% of them ($884 against a typical $375), it is bigger than 16% of them (1,139 ft² against a typical 1,760 ft²), its lot is bigger than 75% of them (1.8 ac against a typical 1 ac) and it is newer than 11% of them (1920 against a typical 1972). Measured against all of Bristol County, it is worth more than 96% 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 643 River Rd, Westport, MA?

The 2026 property tax bill for 643 River Rd, Westport, MA was $6,235. The county assessed it at $856,400.

More homes on River Rd

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Assigned schools

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