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Single Family ResidenceResidential
$1,748,128$638 / 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 91How 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

331 K ST

SOUTH BOSTON, MA 02127
4
Beds
1.5
Baths
2,741 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.
2,664 ft²
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
14
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.7M
$1.6M low$1.9M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$14,424 (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.$1,245,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$497,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$748,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,548,120

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.Colonial
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.06
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

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

E
Joseph P. Tynan Elementary SchoolF
Elementary · Grades PK–5 · 0.2 mi
H
Excel High SchoolD-
High · Grades 9–12 · 0.4 mi
M
Oliver Hazard Perry K-8 SchoolB-
Middle · Grades PK–8 · 0.4 mi

District: Boston School District

Neighborhood · ZIP 02127These 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.110
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.79

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.44%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
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.37,644
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.15,131 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$146,200
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$170,961
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.45 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

331 K 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 more than 97% of homes in South Boston 02127
  • Costs less per square foot than 90% of homes in South Boston 02127
  • Bigger than 91% of homes in South Boston 02127
  • Has a bigger lot than 85% of homes in South Boston 02127
  • Older than 69% of homes in Suffolk County

What homes are worth in South Boston 02127

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

This home
$440K$1.9M

This home is worth more than 97% of homes in South Boston 02127.

How it measures up in South Boston 02127

The dot is this home. The mark in the middle is the typical home in South Boston 02127.

Estimated value$1,748,128
CheaperTypical $841,754Pricier

Pricier than 97% of homes nearby

Price per ft²$638
CheaperTypical $806Pricier

Pricier than 10% of homes nearby

Living area2,741 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 91% of homes nearby

Lot size2,664 ft²
SmallerTypical 1,220 ft²Bigger

Bigger than 85% of homes nearby

Year built1900
OlderTypical 1905Newer

Newer than 44% of homes nearby

How 331 K St ranks against every home in each area.
MeasureThis homeSouth Boston 02127Suffolk County
Estimated valuepricier than$1,748,12897% of homes92% of homes
Price per ft²pricier than$63810% of homes52% of homes
Living areabigger than2,741 ft²91% of homes81% of homes
Lot sizebigger than2,664 ft²85% of homes51% of homes
Year builtnewer than190044% of homes31% of homes

About 331 K St

How much is 331 K St, South Boston, MA worth?

The TopHap Estimate for 331 K St, South Boston, MA is $1,748,128 as of Sep 24, 2026. The likely range is $1,593,908 to $1,902,348. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 331 K St, South Boston, MA last sell?

331 K St, South Boston, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 331 K St, South Boston, MA?

331 K St, South Boston, MA has 4 bedrooms, 1.5 bathrooms, 2,741 square feet of living space and a 0.06-acre lot.

When was 331 K St, South Boston, MA built?

331 K St, South Boston, MA was built in 1900, making it 126 years old. It is a colonial home. The building has 3 stories.

What schools serve 331 K St, South Boston, MA?

331 K St, South Boston, MA is assigned to Joseph P. Tynan Elementary School (elementary), rated F; Excel High School (high), rated D-; Oliver Hazard Perry K-8 School (middle), rated B-. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 331 K St, South Boston, MA compare to other homes in South Boston 02127?

Among the 11,103 homes in South Boston 02127, it is worth more than 97% of them ($1,748,128 against a typical $841,754), its price per square foot is higher than 10% of them ($638 against a typical $806), it is bigger than 91% of them (2,741 ft² against a typical 1,200 ft²), its lot is bigger than 85% of them (2,664 ft² against a typical 1,220 ft²) and it is newer than 44% of them (1900 against a typical 1905). Measured against all of Suffolk County, it is worth more than 92% 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 331 K St, South Boston, MA?

The 2025 property tax bill for 331 K St, South Boston, MA was $14,424. The county assessed it at $1,245,600.

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