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CondominiumResidential
$320,797$354 / 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 87How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $89,500 on Feb 21, 1990

120 OLNEY ST

DORCHESTER, MA 02121
Building report
3
Beds
1
Baths
905 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.
905 ft²
Lot SizeThe size of the land the home sits on, from county records.
1989
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
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

$321K
$278K low$364K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$89,500 · Feb 21, 1990

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,754 (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.$237,800 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$237,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$366,415

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountySUFFOLK
Lot (acres)The size of the land the home sits on, from county records.0.02
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

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
Up Academy HollandC
Elementary · Grades PK–5 · 0.1 mi
M
Lilla G. Frederick Middle SchoolD+
Middle · Grades 6–8 · 0.3 mi
H
Up Academy DorchesterC+
High · Grades PK–12 · 0.4 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%

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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

120 Olney 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 98% of homes in Suffolk County
  • Costs less per square foot than 92% of homes in Suffolk County
  • Smaller than 96% of homes in Dorchester 02121
  • Has a smaller lot than 97% of homes in Dorchester 02121
  • Newer than 88% of homes in Dorchester

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
$243K$924K

This home is worth more than 9% 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$320,797
CheaperTypical $518,223Pricier

Pricier than 9% of homes nearby

Price per ft²$354
CheaperTypical $357Pricier

Pricier than 49% of homes nearby

Living area905 ft²
SmallerTypical 3,262 ft²Bigger

Bigger than 4% of homes nearby

Lot size905 ft²
SmallerTypical 4,225 ft²Bigger

Bigger than 3% of homes nearby

Year built1989
OlderTypical 1905Newer

Newer than 88% of homes nearby

How 120 Olney St ranks against every home in each area.
MeasureThis homeDorchesterDorchester 02121Suffolk County
Estimated valuepricier than$320,7973% of homes9% of homes2% of homes
Price per ft²pricier than$35422% of homes49% of homes8% of homes
Living areabigger than905 ft²8% of homes4% of homes22% of homes
Lot sizebigger than905 ft²6% of homes3% of homes20% of homes
Year builtnewer than198988% of homes88% of homes85% of homes

About 120 Olney St

How much is 120 Olney St, Dorchester, MA worth?

The TopHap Estimate for 120 Olney St, Dorchester, MA is $320,797 as of Aug 30, 2026. The likely range is $277,767 to $363,827. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 120 Olney St, Dorchester, MA last sell?

120 Olney St, Dorchester, MA last sold on Feb 21, 1990 for $89,500, according to the county's recorded deed.

How big is 120 Olney St, Dorchester, MA?

120 Olney St, Dorchester, MA has 3 bedrooms, 1 bathrooms, 905 square feet of living space and a 0.02-acre lot.

When was 120 Olney St, Dorchester, MA built?

120 Olney St, Dorchester, MA was built in 1989, making it 37 years old. The building has 1 story.

What schools serve 120 Olney St, Dorchester, MA?

120 Olney St, Dorchester, MA is assigned to Up Academy Holland (elementary), rated C; Lilla G. Frederick Middle School (middle), rated D+; Up Academy Dorchester (high), rated C+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 120 Olney St, Dorchester, MA compare to other homes in Dorchester 02121?

Among the 2,911 homes in Dorchester 02121, it is worth more than 9% of them ($320,797 against a typical $518,223), its price per square foot is higher than 49% of them ($354 against a typical $357), it is bigger than 4% of them (905 ft² against a typical 3,262 ft²), its lot is bigger than 3% of them (905 ft² against a typical 4,225 ft²) and it is newer than 88% of them (1989 against a typical 1905). Measured against all of Suffolk County, it is worth more than 2% 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 120 Olney St, Dorchester, MA?

The 2025 property tax bill for 120 Olney St, Dorchester, MA was $2,754. The county assessed it at $237,800.

More homes on Olney St

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