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CondominiumResidential
$644,394$451 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 99How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $499,000 on Jan 26, 2018

51A RIVER ST

MATTAPAN, MA 02126
3
Beds
2.5
Baths
1,429 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
2017
Year BuiltThe year the home was originally built, according to county records.
6
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

$644K
$637K low$652K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$499,000 · Jan 26, 2018
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$644,394
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$515,515

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,472 (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.$558,900 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$558,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$560,595

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountySUFFOLK
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
CoolingThe type of cooling or air conditioning in the home.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
Charles H. Taylor Elementary School
Elementary · Grades PK–5 · 0.5 mi
M
Dr. William Henderson Upper SchoolD+
Middle · Grades 5–12 · 0.7 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

51a 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.

  • Worth more than 80% of homes in Mattapan 02126
  • Costs less per square foot than 79% of homes in Suffolk County
  • Smaller than 72% of homes in Mattapan 02126
  • Has a bigger lot than 98% of homes in Mattapan
  • Newer than 98% of homes in Mattapan

What homes are worth in Mattapan 02126

Each bar is how many homes fall in that price range. The marker is this home.

This home
$290K$815K

This home is worth more than 80% of homes in Mattapan 02126.

How it measures up in Mattapan 02126

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

Estimated value$644,394
CheaperTypical $558,511Pricier

Pricier than 80% of homes nearby

Price per ft²$451
CheaperTypical $405Pricier

Pricier than 73% of homes nearby

Living area1,429 ft²
SmallerTypical 1,918 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.28 ac
SmallerTypical 0.11 acBigger

Bigger than 98% of homes nearby

Year built2017
OlderTypical 1930Newer

Newer than 98% of homes nearby

How 51a River St ranks against every home in each area.
MeasureThis homeMattapanMattapan 02126Suffolk County
Estimated valuepricier than$644,39475% of homes80% of homes39% of homes
Price per ft²pricier than$45166% of homes73% of homes21% of homes
Living areabigger than1,429 ft²31% of homes28% of homes48% of homes
Lot sizebigger than0.28 ac98% of homes98% of homes97% of homes
Year builtnewer than201798% of homes98% of homes96% of homes

About 51a River St

How much is 51a River St, Mattapan, MA worth?

The TopHap Estimate for 51a River St, Mattapan, MA is $644,394 as of Jul 14, 2026. The likely range is $636,762 to $652,026. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 51a River St, Mattapan, MA last sell?

51a River St, Mattapan, MA last sold on Jan 26, 2018 for $499,000, according to the county's recorded deed.

How big is 51a River St, Mattapan, MA?

51a River St, Mattapan, MA has 3 bedrooms, 2.5 bathrooms and 1,429 square feet of living space.

When was 51a River St, Mattapan, MA built?

51a River St, Mattapan, MA was built in 2017, making it 9 years old.

What schools serve 51a River St, Mattapan, MA?

51a River St, Mattapan, MA is assigned to Charles H. Taylor Elementary School (elementary); Dr. William Henderson Upper School (middle), rated D+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 51a River St, Mattapan, MA compare to other homes in Mattapan 02126?

Among the 3,890 homes in Mattapan 02126, it is worth more than 80% of them ($644,394 against a typical $558,511), its price per square foot is higher than 73% of them ($451 against a typical $405), it is bigger than 28% of them (1,429 ft² against a typical 1,918 ft²), its lot is bigger than 98% of them (0.28 ac against a typical 0.11 ac) and it is newer than 98% of them (2017 against a typical 1930). Measured against all of Suffolk County, it is worth more than 39% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 51a River St, Mattapan, MA?

The 2025 property tax bill for 51a River St, Mattapan, MA was $6,472. The county assessed it at $558,900.

Closest homes

More homes in Mattapan 02126

Assigned schools

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