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CondominiumResidential
$758,690$527 / 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 95How 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 $715,000 on Jan 22, 2024

21 WESTERLY ST

WELLESLEY, MA 02482
Building report
3
Beds
1.5
Baths
1,440 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.
2.03 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$759K
$722K low$796K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$715,000 · Jan 22, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,200 (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.$708,000 (2026)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$708,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$674,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$796,775

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
60
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
92
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
32
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyNORFOLK
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.1983
Lot (acres)The size of the land the home sits on, from county records.2.03
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Isaac Sprague Elementary SchoolA+
Elementary · Grades KG–5 · 0.3 mi
M
Wellesley Middle SchoolA+
Middle · Grades 6–8 · 0.4 mi
H
Wellesley High SchoolA+
High · Grades 9–12 · 0.9 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

21 Westerly 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 98% of homes in Wellesley 02482
  • Costs less per square foot than 96% of homes in Wellesley Square
  • Smaller than 87% of homes in Wellesley 02482
  • Has a bigger lot than 92% of homes in Wellesley 02482
  • Newer than 73% of homes in Wellesley Square

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
$742K$5.2M

This home is worth more than 2% 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$758,690
CheaperTypical $1,910,855Pricier

Pricier than 2% of homes nearby

Price per ft²$527
CheaperTypical $818Pricier

Pricier than 4% of homes nearby

Living area1,440 ft²
SmallerTypical 2,352 ft²Bigger

Bigger than 13% of homes nearby

Lot size2.03 ac
SmallerTypical 0.3 acBigger

Bigger than 92% of homes nearby

Year built1971
OlderTypical 1955Newer

Newer than 63% of homes nearby

How 21 Westerly St ranks against every home in each area.
MeasureThis homeWellesley SquareWellesley 02482Norfolk County
Estimated valuepricier than$758,6909% of homes2% of homes54% of homes
Price per ft²pricier than$5274% of homes4% of homes70% of homes
Living areabigger than1,440 ft²28% of homes13% of homes37% of homes
Lot sizebigger than2.03 ac87% of homes92% of homes89% of homes
Year builtnewer than197173% of homes63% of homes64% of homes

About 21 Westerly St

How much is 21 Westerly St, Wellesley, MA worth?

The TopHap Estimate for 21 Westerly St, Wellesley, MA is $758,690 as of Sep 24, 2026. The likely range is $721,572 to $795,808. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Westerly St, Wellesley, MA last sell?

21 Westerly St, Wellesley, MA last sold on Jan 22, 2024 for $715,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Westerly St, Wellesley, MA?

21 Westerly St, Wellesley, MA has 3 bedrooms, 1.5 bathrooms, 1,440 square feet of living space and a 2.03-acre lot.

When was 21 Westerly St, Wellesley, MA built?

21 Westerly St, Wellesley, MA was built in 1971, making it 55 years old. It is a condo/apartment home. The building has 2 stories.

What schools serve 21 Westerly St, Wellesley, MA?

21 Westerly St, Wellesley, MA is assigned to Isaac Sprague 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 21 Westerly St, Wellesley, MA compare to other homes in Wellesley 02482?

Among the 3,546 homes in Wellesley 02482, it is worth more than 2% of them ($758,690 against a typical $1,910,855), its price per square foot is higher than 4% of them ($527 against a typical $818), it is bigger than 13% of them (1,440 ft² against a typical 2,352 ft²), its lot is bigger than 92% of them (2.03 ac against a typical 0.3 ac) and it is newer than 63% of them (1971 against a typical 1955). Measured against all of Norfolk County, it is worth more than 54% 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 Westerly St, Wellesley, MA?

The 2026 property tax bill for 21 Westerly St, Wellesley, MA was $7,200. The county assessed it at $708,000.

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