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CondominiumResidential
$1,358,818$1,143 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $977,500 on Dec 3, 2015

1 BLACKSTONE ST

CAMBRIDGE, MA 02139
4
Beds
3
Baths
1,189 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.
2,392 ft²
Lot SizeThe size of the land the home sits on, from county records.
1916
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.4M
$1.3M low$1.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$977,500 · Dec 3, 2015

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,085 (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.$1,273,200 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,273,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,177,240

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.36 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.71%
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
CountyMIDDLESEX
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
Amigos SchoolA
Elementary · Grades PK–8 · 0.3 mi
H
Cambridge Rindge and LatinB
High · Grades 9–12 · 0.8 mi

District: Cambridge School District

Neighborhood · ZIP 02139These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

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.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.39,263
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.22,546 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$114,313
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$158,134
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

1 Blackstone 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 85% of homes in Middlesex County
  • Among the highest price per square foot in Middlesex County
  • Smaller than 81% of homes in Middlesex County
  • Has a smaller lot than 98% of homes in Middlesex County
  • Older than 79% of homes in Middlesex County

What homes are worth in Cambridge 02139

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

This home
$393K$2.7M

This home is worth more than 77% of homes in Cambridge 02139.

How it measures up in Cambridge 02139

The dot is this home. The mark in the middle is the typical home in Cambridge 02139.

Estimated value$1,358,818
CheaperTypical $921,989Pricier

Pricier than 77% of homes nearby

Price per ft²$1143
CheaperTypical $916Pricier

Pricier than 89% of homes nearby

Living area1,189 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 49% of homes nearby

Lot size2,392 ft²
SmallerTypical 0.11 acBigger

Bigger than 15% of homes nearby

Year built1916
OlderTypical 1903Newer

Newer than 63% of homes nearby

How 1 Blackstone St ranks against every home in each area.
MeasureThis homeRiversideCambridge 02139Middlesex County
Estimated valuepricier than$1,358,81874% of homes77% of homes85% of homes
Price per ft²pricier than$114381% of homes89% of homesalmost all homes
Living areabigger than1,189 ft²53% of homes49% of homes19% of homes
Lot sizebigger than2,392 ft²17% of homes15% of homes2% of homes
Year builtnewer than191654% of homes63% of homes21% of homes

About 1 Blackstone St

How much is 1 Blackstone St, Cambridge, MA worth?

The TopHap Estimate for 1 Blackstone St, Cambridge, MA is $1,358,818 as of Sep 24, 2026. The likely range is $1,280,760 to $1,436,876. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1 Blackstone St, Cambridge, MA last sell?

1 Blackstone St, Cambridge, MA last sold on Dec 3, 2015 for $977,500, according to the county's recorded deed.

How big is 1 Blackstone St, Cambridge, MA?

1 Blackstone St, Cambridge, MA has 4 bedrooms, 3 bathrooms and 1,189 square feet of living space.

When was 1 Blackstone St, Cambridge, MA built?

1 Blackstone St, Cambridge, MA was built in 1916, making it 110 years old. The building has 2 stories.

What schools serve 1 Blackstone St, Cambridge, MA?

1 Blackstone St, Cambridge, MA is assigned to Amigos School (elementary), rated A; Cambridge Rindge and Latin (high), rated B. All sit in Cambridge School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1 Blackstone St, Cambridge, MA compare to other homes in Cambridge 02139?

Among the 7,274 homes in Cambridge 02139, it is worth more than 77% of them ($1,358,818 against a typical $921,989), its price per square foot is higher than 89% of them ($1143 against a typical $916), it is bigger than 49% of them (1,189 ft² against a typical 1,200 ft²), its lot is bigger than 15% of them (2,392 ft² against a typical 0.11 ac) and it is newer than 63% of them (1916 against a typical 1903). Measured against all of Middlesex County, it is worth more than 85% 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 1 Blackstone St, Cambridge, MA?

The 2025 property tax bill for 1 Blackstone St, Cambridge, MA was $8,085. The county assessed it at $1,273,200.

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