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CondominiumResidential
$789,250$760 / 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 Jun 23, 2026
Last sold for $460,500 on Nov 30, 2007

280 RIVER ST

CAMBRIDGE, MA 02139
Building report
2
Beds
1.5
Baths
1,039 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.
0.59 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
3
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

$789K
$742K low$837K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$460,500 · Nov 30, 2007
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$447,250
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$357,800
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.43%
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.$342,000
BANK OF CANTON · recorded Apr 29, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,278 (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.$988,700 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$988,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$825,550

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.53
87
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
59
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
32
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.39 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.80%
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

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
Amigos SchoolA
Elementary · Grades PK–8 · 0.2 mi
H
Cambridge Rindge and LatinA-
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
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

280 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.

  • Worth less than 77% of homes in Cambridgeport
  • Costs more per square foot than 89% of homes in Middlesex County
  • Smaller than 87% of homes in Middlesex County
  • Has a bigger lot than 91% of homes in Cambridge 02139
  • Newer than 98% of homes in Cambridge 02139

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
$396K$2.7M

This home is worth more than 35% 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$789,250
CheaperTypical $922,460Pricier

Pricier than 35% of homes nearby

Price per ft²$760
CheaperTypical $914Pricier

Pricier than 14% of homes nearby

Living area1,039 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 39% of homes nearby

Lot size0.59 ac
SmallerTypical 0.11 acBigger

Bigger than 91% of homes nearby

Year built2006
OlderTypical 1903Newer

Newer than 98% of homes nearby

How 280 River St ranks against every home in each area.
MeasureThis homeCambridgeportCambridge 02139Middlesex County
Estimated valuepricier than$789,25023% of homes35% of homes51% of homes
Price per ft²pricier than$76014% of homes14% of homes89% of homes
Living areabigger than1,039 ft²32% of homes39% of homes13% of homes
Lot sizebigger than0.59 ac86% of homes91% of homes69% of homes
Year builtnewer than200697% of homes98% of homes92% of homes

About 280 River St

How much is 280 River St, Cambridge, MA worth?

The TopHap Estimate for 280 River St, Cambridge, MA is $789,250 as of Jun 23, 2026. The likely range is $741,895 to $836,605. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 280 River St, Cambridge, MA last sell?

280 River St, Cambridge, MA last sold on Nov 30, 2007 for $460,500, according to the county's recorded deed.

How big is 280 River St, Cambridge, MA?

280 River St, Cambridge, MA has 2 bedrooms, 1.5 bathrooms and 1,039 square feet of living space.

When was 280 River St, Cambridge, MA built?

280 River St, Cambridge, MA was built in 2006, making it 20 years old. The building has 3 stories.

What schools serve 280 River St, Cambridge, MA?

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

How does 280 River St, Cambridge, MA compare to other homes in Cambridge 02139?

Among the 7,274 homes in Cambridge 02139, it is worth more than 35% of them ($789,250 against a typical $922,460), its price per square foot is higher than 14% of them ($760 against a typical $914), it is bigger than 39% of them (1,039 ft² against a typical 1,200 ft²), its lot is bigger than 91% of them (0.59 ac against a typical 0.11 ac) and it is newer than 98% of them (2006 against a typical 1903). Measured against all of Middlesex County, it is worth more than 51% 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 280 River St, Cambridge, MA?

The 2025 property tax bill for 280 River St, Cambridge, MA was $6,278. The county assessed it at $988,700.

Closest homes

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Assigned schools

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