Skip to content
Skip to content
TopHapOpen in map
Triplex (3 Units, Any Combination)Residential
Last sold for $200,000 on Aug 10, 1989

623 RIVER ST

MATTAPAN, MA 02126
6
Beds
3 / 1
Baths
3,020 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.
3,850 ft²
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
4
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.$200,000 · Aug 10, 1989
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$159,000
WASHINGTON MUTUAL BANK · recorded May 6, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,703 (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.$665,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$217,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$447,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$607,800

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.7 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.Triplex (3 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Conventional
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.1988
Lot (acres)The size of the land the home sits on, from county records.0.09
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
James J Chittick Elementary SchoolC-
Elementary · Grades PK–5 · 0.3 mi
M
Mildred Avenue K-8 SchoolD+
Middle · Grades KG–8 · 0.8 mi
H
Another Course To CollegeF
High · Grades 9–12 · 1.0 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

623 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.

  • Bigger than 85% of homes in Suffolk County
  • Has a smaller lot 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.

Living area3,020 ft²
SmallerTypical 1,920 ft²Bigger

Bigger than 76% of homes nearby

Lot size3,850 ft²
SmallerTypical 0.11 acBigger

Bigger than 20% of homes nearby

Year built1925
OlderTypical 1930Newer

Newer than 49% of homes nearby

How 623 River St ranks against every home in each area.
MeasureThis homeMattapanMattapan 02126Suffolk County
Living areabigger than3,020 ft²79% of homes76% of homes85% of homes
Lot sizebigger than3,850 ft²23% of homes20% of homes62% of homes
Year builtnewer than192550% of homes49% of homes58% of homes

About 623 River St

When did 623 River St, Mattapan, MA last sell?

623 River St, Mattapan, MA last sold on Aug 10, 1989 for $200,000, according to the county's recorded deed.

How big is 623 River St, Mattapan, MA?

623 River St, Mattapan, MA has 6 bedrooms, 3 bathrooms, 3,020 square feet of living space and a 0.09-acre lot.

When was 623 River St, Mattapan, MA built?

623 River St, Mattapan, MA was built in 1925, making it 101 years old. It is a conventional home. The building has 2 stories.

What schools serve 623 River St, Mattapan, MA?

623 River St, Mattapan, MA is assigned to James J Chittick Elementary School (elementary), rated C-; Mildred Avenue K-8 School (middle), rated D+; Another Course To College (high), rated F. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 623 River St, Mattapan, MA compare to other homes in Mattapan 02126?

Among the 3,890 homes in Mattapan 02126, it is bigger than 76% of them (3,020 ft² against a typical 1,920 ft²), its lot is bigger than 20% of them (3,850 ft² against a typical 0.11 ac) and it is newer than 49% of them (1925 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 623 River St, Mattapan, MA?

The 2025 property tax bill for 623 River St, Mattapan, MA was $7,703. The county assessed it at $665,200.

More homes on River St

Closest homes

More homes in Mattapan 02126

Assigned schools

Explore the area

See this home in context

Open 623 River St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map