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Single Family ResidenceResidential
$404,115$332 / 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 Aug 30, 2026

31 KEY ST

BELLINGHAM, MA 02019
3
Beds
1
Baths
1,216 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.
0.53 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.
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

$404K
$383K low$425K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,102 (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.$406,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$167,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$238,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$441,465

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.Bungalow
CountyNORFOLK
Lot (acres)The size of the land the home sits on, from county records.0.53
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.Hot Water
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(1)

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
Joseph F. DiPietro Elementary SchoolB-
Elementary · Grades KG–3 · 1.1 mi
M
Bellingham Memorial SchoolC+
Middle · Grades 4–7 · 3.9 mi
H
Bellingham High SchoolC
High · Grades 8–12 · 4.0 mi

District: Bellingham School District

Neighborhood · ZIP 02019These 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.95
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 100.64

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.97%
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.5.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.17,554
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.931 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,962
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$129,449
Average tempThe average temperature here across a full year.49°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

31 Key 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 94% of homes in Norfolk County
  • Costs less per square foot than 87% of homes in Norfolk County
  • Smaller than 81% of homes in Bellingham 02019
  • Older than 94% of homes in Bellingham 02019

What homes are worth in Bellingham 02019

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

This home
$331K$893K

This home is worth more than 14% of homes in Bellingham 02019.

How it measures up in Bellingham 02019

The dot is this home. The mark in the middle is the typical home in Bellingham 02019.

Estimated value$404,115
CheaperTypical $504,121Pricier

Pricier than 14% of homes nearby

Price per ft²$332
CheaperTypical $307Pricier

Pricier than 65% of homes nearby

Living area1,216 ft²
SmallerTypical 1,700 ft²Bigger

Bigger than 19% of homes nearby

Lot size0.53 ac
SmallerTypical 0.51 acBigger

Bigger than 52% of homes nearby

Year built1920
OlderTypical 1968Newer

Newer than 6% of homes nearby

How 31 Key St ranks against every home in each area.
MeasureThis homeBellingham 02019Norfolk County
Estimated valuepricier than$404,11514% of homes6% of homes
Price per ft²pricier than$33265% of homes13% of homes
Living areabigger than1,216 ft²19% of homes23% of homes
Lot sizebigger than0.53 ac52% of homes64% of homes
Year builtnewer than19206% of homes18% of homes

About 31 Key St

How much is 31 Key St, Bellingham, MA worth?

The TopHap Estimate for 31 Key St, Bellingham, MA is $404,115 as of Aug 30, 2026. The likely range is $383,139 to $425,091. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 31 Key St, Bellingham, MA last sell?

31 Key St, Bellingham, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 31 Key St, Bellingham, MA?

31 Key St, Bellingham, MA has 3 bedrooms, 1 bathrooms, 1,216 square feet of living space and a 0.53-acre lot.

When was 31 Key St, Bellingham, MA built?

31 Key St, Bellingham, MA was built in 1920, making it 106 years old. It is a bungalow home. The building has 1 story.

What schools serve 31 Key St, Bellingham, MA?

31 Key St, Bellingham, MA is assigned to Joseph F. DiPietro Elementary School (elementary), rated B-; Bellingham Memorial School (middle), rated C+; Bellingham High School (high), rated C. All sit in Bellingham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 31 Key St, Bellingham, MA compare to other homes in Bellingham 02019?

Among the 6,055 homes in Bellingham 02019, it is worth more than 14% of them ($404,115 against a typical $504,121), its price per square foot is higher than 65% of them ($332 against a typical $307), it is bigger than 19% of them (1,216 ft² against a typical 1,700 ft²), its lot is bigger than 52% of them (0.53 ac against a typical 0.51 ac) and it is newer than 6% of them (1920 against a typical 1968). Measured against all of Norfolk County, it is worth more than 6% 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 31 Key St, Bellingham, MA?

The 2025 property tax bill for 31 Key St, Bellingham, MA was $5,102. The county assessed it at $406,200.

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