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Duplex (2 Units, Any Combination)Residential
Last sold for $385,000 on Aug 1, 2013

18 SUMNER ST

DORCHESTER, MA 02125
6
Beds
2
Baths
2,798 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1880
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
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.$385,000 · Aug 1, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,218 (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.$1,055,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$330,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$724,900

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.9 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Duplex (2 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.2014
Lot (acres)The size of the land the home sits on, from county records.0.20
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
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

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
Roger Clap Elementary SchoolD-
Elementary · Grades PK–5 · 0.3 mi
M
John W. Mccormack Middle School
Middle · Grades 6–8 · 0.9 mi
H
Boston Community Leadership AcademyF
High · Grades 9–12 · 0.9 mi

District: Boston School District

Neighborhood · ZIP 02125These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.80

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.24%
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.34,548
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.12,979 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$69,287
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,595
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

18 Sumner 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 82% of homes in Suffolk County
  • Has a bigger lot than 97% of homes in Dorchester 02125
  • Older than 97% of homes in Dorchester

How it measures up in Dorchester 02125

The dot is this home. The mark in the middle is the typical home in Dorchester 02125.

Living area2,798 ft²
SmallerTypical 2,086 ft²Bigger

Bigger than 63% of homes nearby

Lot size0.2 ac
SmallerTypical 2,919 ft²Bigger

Bigger than 97% of homes nearby

Year built1880
OlderTypical 1905Newer

Newer than 3% of homes nearby

How 18 Sumner St ranks against every home in each area.
MeasureThis homeDorchesterDorchester 02125Suffolk County
Living areabigger than2,798 ft²61% of homes63% of homes82% of homes
Lot sizebigger than0.2 ac96% of homes97% of homes93% of homes
Year builtnewer than18803% of homes3% of homes6% of homes

About 18 Sumner St

When did 18 Sumner St, Dorchester, MA last sell?

18 Sumner St, Dorchester, MA last sold on Aug 1, 2013 for $385,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18 Sumner St, Dorchester, MA?

18 Sumner St, Dorchester, MA has 6 bedrooms, 2 bathrooms, 2,798 square feet of living space and a 0.20-acre lot.

When was 18 Sumner St, Dorchester, MA built?

18 Sumner St, Dorchester, MA was built in 1880, making it 146 years old. It is a conventional home. The building has 2 stories.

What schools serve 18 Sumner St, Dorchester, MA?

18 Sumner St, Dorchester, MA is assigned to Roger Clap Elementary School (elementary), rated D-; John W. Mccormack Middle School (middle); Boston Community Leadership Academy (high), rated F. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Sumner St, Dorchester, MA compare to other homes in Dorchester 02125?

Among the 5,736 homes in Dorchester 02125, it is bigger than 63% of them (2,798 ft² against a typical 2,086 ft²), its lot is bigger than 97% of them (0.2 ac against a typical 2,919 ft²) and it is newer than 3% of them (1880 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 18 Sumner St, Dorchester, MA?

The 2025 property tax bill for 18 Sumner St, Dorchester, MA was $12,218. The county assessed it at $1,055,100.

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