Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
$480,242$295 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $550,000 on Nov 18, 2020

139 HAROLD ST

DORCHESTER, MA 02121
Building report
4
Beds
1
Baths
1,628 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.
2,777 ft²
Lot SizeThe size of the land the home sits on, from county records.
2018
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$480K
$446K low$515K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$550,000 · Nov 18, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,917 (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.$511,000 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$511,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$669,370

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.41 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.Condominium
CountySUFFOLK
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(1)

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
Higginson K-2 School
Elementary · Grades PK–2 · 0.1 mi
M
William Monroe Trotter K-8 SchoolD-
Middle · Grades PK–8 · 0.1 mi
H
Boston Latin AcadenyB
High · Grades 7–12 · 0.3 mi

District: Boston School District

Neighborhood · ZIP 02121These 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.142
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 100.73

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.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.23%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.28,076
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.22,114 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$45,811
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$77,928
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%

Owner Tools

Do you own this home?
Claim this home

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

139 Harold 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 less than 84% of homes in Suffolk County
  • Costs less per square foot than 97% of homes in Suffolk County
  • Smaller than 82% of homes in Dorchester 02121
  • Has a smaller lot than 81% of homes in Dorchester 02121
  • Among the newest homes in Dorchester 02121

What homes are worth in Dorchester 02121

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

This home
$234K$962K

This home is worth more than 43% of homes in Dorchester 02121.

How it measures up in Dorchester 02121

The dot is this home. The mark in the middle is the typical home in Dorchester 02121.

Estimated value$480,242
CheaperTypical $502,853Pricier

Pricier than 43% of homes nearby

Price per ft²$295
CheaperTypical $349Pricier

Pricier than 26% of homes nearby

Living area1,628 ft²
SmallerTypical 3,264 ft²Bigger

Bigger than 18% of homes nearby

Lot size2,777 ft²
SmallerTypical 4,269 ft²Bigger

Bigger than 19% of homes nearby

Year built2018
OlderTypical 1905Newer

Newer than almost all homes nearby

How 139 Harold St ranks against every home in each area.
MeasureThis homeRoxburyDorchester 02121Suffolk County
Estimated valuepricier than$480,24233% of homes43% of homes16% of homes
Price per ft²pricier than$29518% of homes26% of homes3% of homes
Living areabigger than1,628 ft²40% of homes18% of homes55% of homes
Lot sizebigger than2,777 ft²52% of homes19% of homes51% of homes
Year builtnewer than201896% of homesalmost all homes97% of homes

About 139 Harold St

How much is 139 Harold St, Dorchester, MA worth?

The TopHap Estimate for 139 Harold St, Dorchester, MA is $480,242 as of Oct 21, 2026. The likely range is $445,810 to $514,674. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 139 Harold St, Dorchester, MA last sell?

139 Harold St, Dorchester, MA last sold on Nov 18, 2020 for $550,000, according to the county's recorded deed.

How big is 139 Harold St, Dorchester, MA?

139 Harold St, Dorchester, MA has 4 bedrooms, 1 bathrooms and 1,628 square feet of living space.

When was 139 Harold St, Dorchester, MA built?

139 Harold St, Dorchester, MA was built in 2018, making it 8 years old. The building has 1 story.

What schools serve 139 Harold St, Dorchester, MA?

139 Harold St, Dorchester, MA is assigned to Higginson K-2 School (elementary); William Monroe Trotter K-8 School (middle), rated D-; Boston Latin Acadeny (high), rated B. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 139 Harold St, Dorchester, MA compare to other homes in Dorchester 02121?

Among the 2,911 homes in Dorchester 02121, it is worth more than 43% of them ($480,242 against a typical $502,853), its price per square foot is higher than 26% of them ($295 against a typical $349), it is bigger than 18% of them (1,628 ft² against a typical 3,264 ft²), its lot is bigger than 19% of them (2,777 ft² against a typical 4,269 ft²) and it is newer than almost all of them (2018 against a typical 1905). Measured against all of Suffolk County, it is worth more than 16% 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 139 Harold St, Dorchester, MA?

The 2025 property tax bill for 139 Harold St, Dorchester, MA was $5,917. The county assessed it at $511,000.

More homes on Harold St

Closest homes

More homes in Dorchester 02121

Assigned schools

Explore the area

See this home in context

Open 139 Harold 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