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Duplex (2 Units, Any Combination)Residential
Last sold for $685,000 on Mar 22, 2022

343 RIVER ST

MATTAPAN, MA 02126
4
Beds
2
Baths
1,728 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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.$685,000 · Mar 22, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,299 (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.$630,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$214,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$415,900

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.2009
Lot (acres)The size of the land the home sits on, from county records.0.14
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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
Ellison / Parks Early Education SchoolD+
Elementary · Grades EE–3 · 0.3 mi
M
Mildred Avenue K-8 SchoolD+
Middle · Grades KG–8 · 0.4 mi
H
Boston International High SchoolF
High · Grades 9–12 · 0.8 mi

District: Boston School District

Neighborhood · ZIP 02126These 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.84
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 100.75

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.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.22,143
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.12,185 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,782
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$107,132
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

343 River 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 bigger lot than 85% of homes in Suffolk County
  • Newer than 80% of homes in Mattapan

How it measures up in Mattapan 02126

The dot is this home. The mark in the middle is the typical home in Mattapan 02126.

Living area1,728 ft²
SmallerTypical 1,920 ft²Bigger

Bigger than 42% of homes nearby

Lot size0.14 ac
SmallerTypical 0.11 acBigger

Bigger than 78% of homes nearby

Year built1950
OlderTypical 1930Newer

Newer than 79% of homes nearby

How 343 River St ranks against every home in each area.
MeasureThis homeMattapanMattapan 02126Suffolk County
Living areabigger than1,728 ft²46% of homes42% of homes59% of homes
Lot sizebigger than0.14 ac79% of homes78% of homes85% of homes
Year builtnewer than195080% of homes79% of homes69% of homes

About 343 River St

When did 343 River St, Mattapan, MA last sell?

343 River St, Mattapan, MA last sold on Mar 22, 2022 for $685,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 343 River St, Mattapan, MA?

343 River St, Mattapan, MA has 4 bedrooms, 2 bathrooms, 1,728 square feet of living space and a 0.14-acre lot.

When was 343 River St, Mattapan, MA built?

343 River St, Mattapan, MA was built in 1950, making it 76 years old. It is a duplex single home. The building has 2 stories.

What schools serve 343 River St, Mattapan, MA?

343 River St, Mattapan, MA is assigned to Ellison / Parks Early Education School (elementary), rated D+; Mildred Avenue K-8 School (middle), rated D+; Boston International High School (high), rated F. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 343 River St, Mattapan, MA compare to other homes in Mattapan 02126?

Among the 3,890 homes in Mattapan 02126, it is bigger than 42% of them (1,728 ft² against a typical 1,920 ft²), its lot is bigger than 78% of them (0.14 ac against a typical 0.11 ac) and it is newer than 79% of them (1950 against a typical 1930). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 343 River St, Mattapan, MA?

The 2025 property tax bill for 343 River St, Mattapan, MA was $7,299. The county assessed it at $630,300.

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