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Duplex (2 Units, Any Combination)Residential

12 WILLIAM ST

SOUTH DARTMOUTH, MA 02748
5
Beds
4.5
Baths
5,132 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.
0.62 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
15
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,634 (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.$886,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$366,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$520,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$858,449

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
CountyBRISTOL
Lot (acres)The size of the land the home sits on, from county records.0.62
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
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

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

E
Joseph DemelloB+
Elementary · Grades KG–5 · 0.9 mi
H
Dartmouth High SchoolB-
High · Grades 9–12 · 2.0 mi
M
Dartmouth Middle SchoolB+
Middle · Grades 6–8 · 2.7 mi

District: Dartmouth School District

Neighborhood · ZIP 02748These 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.117
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.91
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.58

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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.7%
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.12,068
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.466 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$114,677
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$132,559
Average tempThe average temperature here across a full year.50°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

12 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.

  • Among the largest homes in Bristol County
  • Has a bigger lot than 65% of homes in South Dartmouth 02748
  • Older than 95% of homes in Bristol County

How it measures up in South Dartmouth 02748

The dot is this home. The mark in the middle is the typical home in South Dartmouth 02748.

Living area5,132 ft²
SmallerTypical 1,782 ft²Bigger

Bigger than 98% of homes nearby

Lot size0.62 ac
SmallerTypical 0.41 acBigger

Bigger than 65% of homes nearby

Year built1890
OlderTypical 1965Newer

Newer than 7% of homes nearby

How 12 William St ranks against every home in each area.
MeasureThis homeSouth Dartmouth 02748Bristol County
Living areabigger than5,132 ft²98% of homesalmost all homes
Lot sizebigger than0.62 ac65% of homes65% of homes
Year builtnewer than18907% of homes5% of homes

About 12 William St

When did 12 William St, South Dartmouth, MA last sell?

12 William St, South Dartmouth, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12 William St, South Dartmouth, MA?

12 William St, South Dartmouth, MA has 5 bedrooms, 4.5 bathrooms, 5,132 square feet of living space and a 0.62-acre lot.

When was 12 William St, South Dartmouth, MA built?

12 William St, South Dartmouth, MA was built in 1890, making it 136 years old. The building has 2 stories.

What schools serve 12 William St, South Dartmouth, MA?

12 William St, South Dartmouth, MA is assigned to Joseph Demello (elementary), rated B+; Dartmouth High School (high), rated B-; Dartmouth Middle School (middle), rated B+. All sit in Dartmouth School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12 William St, South Dartmouth, MA compare to other homes in South Dartmouth 02748?

Among the 4,976 homes in South Dartmouth 02748, it is bigger than 98% of them (5,132 ft² against a typical 1,782 ft²), its lot is bigger than 65% of them (0.62 ac against a typical 0.41 ac) and it is newer than 7% of them (1890 against a typical 1965). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 12 William St, South Dartmouth, MA?

The 2025 property tax bill for 12 William St, South Dartmouth, MA was $7,634. The county assessed it at $886,700.

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