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Single Family ResidenceResidential
$1,104,875$434 / 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 69How 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
Last sold for $548,000 on Dec 14, 2005

20 S RIVER ST

WELLESLEY, MA 02482
3
Beds
1.5
Baths
2,543 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.
3,158 ft²
Lot SizeThe size of the land the home sits on, from county records.
1880
Year BuiltThe year the home was originally built, according to county records.
2
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

$1.1M
$767K low$1.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$548,000 · Dec 14, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,698 (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.$457,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$432,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$25,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$885,875

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.29 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.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
CountyNORFOLK
Lot (acres)The size of the land the home sits on, from county records.0.07
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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(6)

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
Horatio H. Hunnewell Elementary SchoolA
Elementary · Grades KG–5 · 1.8 mi
M
Wellesley Middle SchoolA
Middle · Grades 6–8 · 2.3 mi
H
Wellesley High SchoolA+
High · Grades 9–12 · 2.5 mi

District: Wellesley School District

Neighborhood · ZIP 02482These 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.79
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.70

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.27%
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.0.9%
PopulationHow many people live in this area.13,654
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,850 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$209,564
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$298,285
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

20 S 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 90% of homes in Wellesley 02482
  • Among the lowest price per square foot in Wellesley 02482
  • Bigger than 80% of homes in Norfolk County
  • Among the smallest lots in Wellesley 02482
  • Older than 97% of homes in Wellesley 02482

What homes are worth in Wellesley 02482

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

This home
$757K$5M

This home is worth more than 10% of homes in Wellesley 02482.

How it measures up in Wellesley 02482

The dot is this home. The mark in the middle is the typical home in Wellesley 02482.

Estimated value$1,104,875
CheaperTypical $1,919,218Pricier

Pricier than 10% of homes nearby

Price per ft²$434
CheaperTypical $833Pricier

Cheaper than almost all homes nearby

Living area2,543 ft²
SmallerTypical 2,339 ft²Bigger

Bigger than 57% of homes nearby

Lot size3,158 ft²
SmallerTypical 0.3 acBigger

Smaller than almost all homes nearby

Year built1880
OlderTypical 1955Newer

Newer than 3% of homes nearby

How 20 S River St ranks against every home in each area.
MeasureThis homeWellesley 02482Norfolk County
Estimated valuepricier than$1,104,87510% of homes77% of homes
Price per ft²pricier than$434almost no homes47% of homes
Living areabigger than2,543 ft²57% of homes80% of homes
Lot sizebigger than3,158 ft²almost no homesalmost no homes
Year builtnewer than18803% of homes3% of homes

About 20 S River St

How much is 20 S River St, Wellesley, MA worth?

The TopHap Estimate for 20 S River St, Wellesley, MA is $1,104,875 as of Jul 14, 2026. The likely range is $766,792 to $1,442,958. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 S River St, Wellesley, MA last sell?

20 S River St, Wellesley, MA last sold on Dec 14, 2005 for $548,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 20 S River St, Wellesley, MA?

20 S River St, Wellesley, MA has 3 bedrooms, 1.5 bathrooms, 2,543 square feet of living space and a 0.07-acre lot.

When was 20 S River St, Wellesley, MA built?

20 S River St, Wellesley, MA was built in 1880, making it 146 years old. The building has 2 stories.

What schools serve 20 S River St, Wellesley, MA?

20 S River St, Wellesley, MA is assigned to Horatio H. Hunnewell Elementary School (elementary), rated A; Wellesley Middle School (middle), rated A; Wellesley High School (high), rated A+. All sit in Wellesley School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 S River St, Wellesley, MA compare to other homes in Wellesley 02482?

Among the 3,546 homes in Wellesley 02482, it is worth more than 10% of them ($1,104,875 against a typical $1,919,218), its price per square foot is higher than almost none of them ($434 against a typical $833), it is bigger than 57% of them (2,543 ft² against a typical 2,339 ft²), its lot is bigger than almost none of them (3,158 ft² against a typical 0.3 ac) and it is newer than 3% of them (1880 against a typical 1955). Measured against all of Norfolk County, it is worth more than 77% 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 20 S River St, Wellesley, MA?

The 2025 property tax bill for 20 S River St, Wellesley, MA was $4,698. The county assessed it at $457,000.

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