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Duplex (2 Units, Any Combination)Residential
Last sold for $257,000 on May 25, 2010

100 ALEXANDER ST

DORCHESTER, MA 02125
5
Beds
2
Baths
1,824 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.
2,231 ft²
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.
9
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$257,000 · May 25, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,992 (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.$344,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$113,751
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$230,949
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$328,300

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.24 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountySuffolk
Lot (acres)The size of the land the home sits on, from county records.0.05
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(4)

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
Martin Luther Jr. King K-8 SchoolC-
Elementary · Grades PK–8 · 0.4 mi
H
Boston Latin AcadenyB+
High · Grades 7–12 · 0.7 mi

District: Boston School District

Neighborhood · ZIP 02125These 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.128
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 100.80

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.24%
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.34,548
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.12,979 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$69,287
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,595
Average tempThe average temperature here across a full year.50°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.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

100 Alexander 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.

  • Has a smaller lot than 75% of homes in Dorchester
  • Older than 90% of homes in Dorchester

How it measures up in Dorchester 02125

The dot is this home. The mark in the middle is the typical home in Dorchester 02125.

Living area1,824 ft²
SmallerTypical 2,070 ft²Bigger

Bigger than 46% of homes nearby

Lot size2,231 ft²
SmallerTypical 2,875 ft²Bigger

Bigger than 37% of homes nearby

Year built1890
OlderTypical 1905Newer

Newer than 12% of homes nearby

How 100 Alexander St ranks against every home in each area.
MeasureThis homeDorchesterDorchester 02125Suffolk County
Living areabigger than1,824 ft²39% of homes46% of homes62% of homes
Lot sizebigger than2,231 ft²25% of homes37% of homes48% of homes
Year builtnewer than189010% of homes12% of homes13% of homes

About 100 Alexander St

When did 100 Alexander St, Dorchester, MA last sell?

100 Alexander St, Dorchester, MA last sold on May 25, 2010 for $257,000, according to the county's recorded deed.

How big is 100 Alexander St, Dorchester, MA?

100 Alexander St, Dorchester, MA has 5 bedrooms, 2 bathrooms, 1,824 square feet of living space and a 0.05-acre lot.

When was 100 Alexander St, Dorchester, MA built?

100 Alexander St, Dorchester, MA was built in 1890, making it 136 years old. It is a conventional home. The building has 2 stories.

What schools serve 100 Alexander St, Dorchester, MA?

100 Alexander St, Dorchester, MA is assigned to Martin Luther Jr. King K-8 School (elementary), rated C-; Boston Latin Acadeny (high), rated B+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 100 Alexander St, Dorchester, MA compare to other homes in Dorchester 02125?

Among the 5,736 homes in Dorchester 02125, it is bigger than 46% of them (1,824 ft² against a typical 2,070 ft²), its lot is bigger than 37% of them (2,231 ft² against a typical 2,875 ft²) and it is newer than 12% of them (1890 against a typical 1905). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 100 Alexander St, Dorchester, MA?

The 2025 property tax bill for 100 Alexander St, Dorchester, MA was $3,992. The county assessed it at $344,700.

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