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Triplex (3 Units, Any Combination)Residential

421 SEAVER ST

DORCHESTER, MA 02121
6
Beds
4
Baths
3,891 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.
2,730 ft²
Lot SizeThe size of the land the home sits on, from county records.
1905
Year BuiltThe year the home was originally built, according to county records.
3
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.$11,149 (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.$962,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$219,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$743,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$928,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Triplex (3 Units, Any Combination)
CountySuffolk
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2016
Lot (acres)The size of the land the home sits on, from county records.0.06
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(11)

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
Jeremiah E. Burke High SchoolD-
High · Grades 9–12 · 0.3 mi
E
Sarah Greenwood K-8 SchoolD+
Elementary · Grades PK–8 · 0.4 mi

District: Boston School District

Neighborhood · ZIP 02121These 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.142
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.73

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.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.23%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.28,076
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.22,114 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$45,811
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$77,928
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

421 Seaver 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.

  • Bigger than 94% of homes in Suffolk County
  • Has a smaller lot than 81% of homes in Dorchester 02121

How it measures up in Dorchester 02121

The dot is this home. The mark in the middle is the typical home in Dorchester 02121.

Living area3,891 ft²
SmallerTypical 3,249 ft²Bigger

Bigger than 70% of homes nearby

Lot size2,730 ft²
SmallerTypical 4,269 ft²Bigger

Bigger than 19% of homes nearby

Year built1905
OlderTypical 1905Newer

Newer than 57% of homes nearby

How 421 Seaver St ranks against every home in each area.
MeasureThis homeDorchesterDorchester 02121Suffolk County
Living areabigger than3,891 ft²87% of homes70% of homes94% of homes
Lot sizebigger than2,730 ft²30% of homes19% of homes52% of homes
Year builtnewer than190549% of homes57% of homes37% of homes

About 421 Seaver St

How big is 421 Seaver St, Dorchester, MA?

421 Seaver St, Dorchester, MA has 6 bedrooms, 4 bathrooms, 3,891 square feet of living space and a 0.06-acre lot.

When was 421 Seaver St, Dorchester, MA built?

421 Seaver St, Dorchester, MA was built in 1905, making it 121 years old. The building has 3 stories.

What schools serve 421 Seaver St, Dorchester, MA?

421 Seaver St, Dorchester, MA is assigned to Jeremiah E. Burke High School (high), rated D-; Sarah Greenwood K-8 School (elementary), rated D+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Seaver St, Dorchester, MA compare to other homes in Dorchester 02121?

Among the 2,911 homes in Dorchester 02121, it is bigger than 70% of them (3,891 ft² against a typical 3,249 ft²), its lot is bigger than 19% of them (2,730 ft² against a typical 4,269 ft²) and it is newer than 57% of them (1905 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 421 Seaver St, Dorchester, MA?

The 2025 property tax bill for 421 Seaver St, Dorchester, MA was $11,149. The county assessed it at $962,800.

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