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Single Family ResidenceResidential
$528,314$579 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $397,000 on Sep 19, 2019

20 WILLIAM ST

WALPOLE, MA 02081
3
Beds
1
Baths
912 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.
0.31 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
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

$528K
$507K low$550K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$397,000 · Sep 19, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,582 (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.$435,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$289,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$145,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$475,475

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
CountyNORFOLK
Lot (acres)The size of the land the home sits on, from county records.0.31
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(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.

H
Walpole High SchoolA-
High · Grades 9–12 · 0.9 mi
E
Elm Street SchoolB-
Elementary · Grades KG–5 · 1.6 mi

District: Walpole School District

Neighborhood · ZIP 02081These 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.27
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.64

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.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.20,697
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,190 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$154,284
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$180,354
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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 William 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 88% of homes in Walpole 02081
  • Costs more per square foot than 95% of homes in Walpole 02081
  • Smaller than 97% of homes in Walpole 02081
  • Has a smaller lot than 88% of homes in Walpole 02081
  • Older than 76% of homes in Walpole 02081

What homes are worth in Walpole 02081

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

This home
$407K$1.7M

This home is worth more than 12% of homes in Walpole 02081.

How it measures up in Walpole 02081

The dot is this home. The mark in the middle is the typical home in Walpole 02081.

Estimated value$528,314
CheaperTypical $742,077Pricier

Pricier than 12% of homes nearby

Price per ft²$579
CheaperTypical $416Pricier

Pricier than 95% of homes nearby

Living area912 ft²
SmallerTypical 1,789 ft²Bigger

Bigger than 3% of homes nearby

Lot size0.31 ac
SmallerTypical 0.58 acBigger

Bigger than 12% of homes nearby

Year built1952
OlderTypical 1973Newer

Newer than 24% of homes nearby

How 20 William St ranks against every home in each area.
MeasureThis homeWalpole 02081Norfolk County
Estimated valuepricier than$528,31412% of homes19% of homes
Price per ft²pricier than$57995% of homes76% of homes
Living areabigger than912 ft²3% of homes8% of homes
Lot sizebigger than0.31 ac12% of homes43% of homes
Year builtnewer than195224% of homes41% of homes

About 20 William St

How much is 20 William St, Walpole, MA worth?

The TopHap Estimate for 20 William St, Walpole, MA is $528,314 as of Aug 30, 2026. The likely range is $506,821 to $549,806. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 William St, Walpole, MA last sell?

20 William St, Walpole, MA last sold on Sep 19, 2019 for $397,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 20 William St, Walpole, MA?

20 William St, Walpole, MA has 3 bedrooms, 1 bathrooms, 912 square feet of living space and a 0.31-acre lot.

When was 20 William St, Walpole, MA built?

20 William St, Walpole, MA was built in 1952, making it 74 years old. It is a ranch home. The building has 1 story.

What schools serve 20 William St, Walpole, MA?

20 William St, Walpole, MA is assigned to Walpole High School (high), rated A-; Elm Street School (elementary), rated B-. All sit in Walpole School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 William St, Walpole, MA compare to other homes in Walpole 02081?

Among the 6,504 homes in Walpole 02081, it is worth more than 12% of them ($528,314 against a typical $742,077), its price per square foot is higher than 95% of them ($579 against a typical $416), it is bigger than 3% of them (912 ft² against a typical 1,789 ft²), its lot is bigger than 12% of them (0.31 ac against a typical 0.58 ac) and it is newer than 24% of them (1952 against a typical 1973). Measured against all of Norfolk County, it is worth more than 19% 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 William St, Walpole, MA?

The 2025 property tax bill for 20 William St, Walpole, MA was $5,582. The county assessed it at $435,100.

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