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Duplex (2 Units, Any Combination)Residential
Last sold for $567,000 on Apr 15, 2015

20 ROSARIA ST

DORCHESTER, MA 02122
4
Beds
2.5
Baths
2,160 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.
0.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$567,000 · Apr 15, 2015

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,598 (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.$828,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$261,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$567,400

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.Duplex Single
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.2020
Lot (acres)The size of the land the home sits on, from county records.0.10
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(10)

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
Thomas J. Kenny Elementary SchoolC+
Elementary · Grades PK–5 · 0.2 mi
M
Richard J. Murphy K-8 SchoolB-
Middle · Grades PK–8 · 0.5 mi
H
Dr. William Henderson Upper SchoolD+
High · Grades 5–12 · 1.1 mi

District: Boston School District

Neighborhood · ZIP 02122These 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.90
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.76

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.16%
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.23,849
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.11,977 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,827
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,947
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

20 Rosaria 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 70% of homes in Suffolk County
  • Has a bigger lot than 75% of homes in Dorchester 02122
  • Newer than 75% of homes in Dorchester

How it measures up in Dorchester 02122

The dot is this home. The mark in the middle is the typical home in Dorchester 02122.

Living area2,160 ft²
SmallerTypical 1,912 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.1 ac
SmallerTypical 3,398 ft²Bigger

Bigger than 75% of homes nearby

Year built1928
OlderTypical 1910Newer

Newer than 71% of homes nearby

How 20 Rosaria St ranks against every home in each area.
MeasureThis homeDorchesterDorchester 02122Suffolk County
Living areabigger than2,160 ft²46% of homes55% of homes70% of homes
Lot sizebigger than0.1 ac68% of homes75% of homes71% of homes
Year builtnewer than192875% of homes71% of homes59% of homes

About 20 Rosaria St

When did 20 Rosaria St, Dorchester, MA last sell?

20 Rosaria St, Dorchester, MA last sold on Apr 15, 2015 for $567,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 20 Rosaria St, Dorchester, MA?

20 Rosaria St, Dorchester, MA has 4 bedrooms, 2.5 bathrooms, 2,160 square feet of living space and a 0.10-acre lot.

When was 20 Rosaria St, Dorchester, MA built?

20 Rosaria St, Dorchester, MA was built in 1928, making it 98 years old. It is a duplex single home. The building has 2 stories.

What schools serve 20 Rosaria St, Dorchester, MA?

20 Rosaria St, Dorchester, MA is assigned to Thomas J. Kenny Elementary School (elementary), rated C+; Richard J. Murphy K-8 School (middle), rated B-; Dr. William Henderson Upper School (high), rated D+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Rosaria St, Dorchester, MA compare to other homes in Dorchester 02122?

Among the 4,918 homes in Dorchester 02122, it is bigger than 55% of them (2,160 ft² against a typical 1,912 ft²), its lot is bigger than 75% of them (0.1 ac against a typical 3,398 ft²) and it is newer than 71% of them (1928 against a typical 1910). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Rosaria St, Dorchester, MA?

The 2025 property tax bill for 20 Rosaria St, Dorchester, MA was $9,598. The county assessed it at $828,800.

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