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CondominiumResidential
$1,120,663$843 / 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 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $1,113,000 on May 26, 2021

133 RIVER ST

CAMBRIDGE, MA 02139
Building report
2
Beds
2
Baths
1,329 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.
2,995 ft²
Lot SizeThe size of the land the home sits on, from county records.
1899
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.

Valuation

$1.1M
$968K low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,113,000 · May 26, 2021
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.$397,213
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$317,770
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.63%
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.$723,450
FIRST REPUBLIC BANK · P · 2.55% 1 · recorded May 26, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,989 (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.$943,100 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$943,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,344,915

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.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(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 · 0.1 mi
H
Cambridge Rindge and LatinA-
High · Grades 9–12 · 0.7 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.Owner occupied
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

133 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 more than 77% of homes in Middlesex County
  • Costs more per square foot than 94% of homes in Middlesex County
  • Smaller than 74% of homes in Middlesex County
  • Has a smaller lot than 96% of homes in Middlesex County
  • Older than 91% 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
$400K$2.6M

This home is worth more than 65% 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$1,120,663
CheaperTypical $918,000Pricier

Pricier than 65% of homes nearby

Price per ft²$843
CheaperTypical $914Pricier

Pricier than 31% of homes nearby

Living area1,329 ft²
SmallerTypical 1,205 ft²Bigger

Bigger than 57% of homes nearby

Lot size2,995 ft²
SmallerTypical 0.11 acBigger

Bigger than 24% of homes nearby

Year built1899
OlderTypical 1903Newer

Newer than 35% of homes nearby

How 133 River St ranks against every home in each area.
MeasureThis homeRiversideCambridge 02139Middlesex County
Estimated valuepricier than$1,120,66362% of homes65% of homes77% of homes
Price per ft²pricier than$84323% of homes31% of homes94% of homes
Living areabigger than1,329 ft²61% of homes57% of homes26% of homes
Lot sizebigger than2,995 ft²28% of homes24% of homes4% of homes
Year builtnewer than189932% of homes35% of homes9% of homes

About 133 River St

How much is 133 River St, Cambridge, MA worth?

The TopHap Estimate for 133 River St, Cambridge, MA is $1,120,663 as of Jul 14, 2026. The likely range is $968,307 to $1,273,019. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 133 River St, Cambridge, MA last sell?

133 River St, Cambridge, MA last sold on May 26, 2021 for $1,113,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 133 River St, Cambridge, MA?

133 River St, Cambridge, MA has 2 bedrooms, 2 bathrooms and 1,329 square feet of living space.

When was 133 River St, Cambridge, MA built?

133 River St, Cambridge, MA was built in 1899, making it 127 years old. The building has 1 story.

What schools serve 133 River St, Cambridge, MA?

133 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 133 River St, Cambridge, MA compare to other homes in Cambridge 02139?

Among the 7,274 homes in Cambridge 02139, it is worth more than 65% of them ($1,120,663 against a typical $918,000), its price per square foot is higher than 31% of them ($843 against a typical $914), it is bigger than 57% of them (1,329 ft² against a typical 1,205 ft²), its lot is bigger than 24% of them (2,995 ft² against a typical 0.11 ac) and it is newer than 35% of them (1899 against a typical 1903). Measured against all of Middlesex County, it is worth more than 77% 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 133 River St, Cambridge, MA?

The 2025 property tax bill for 133 River St, Cambridge, MA was $5,989. The county assessed it at $943,100.

Closest homes

More homes in Cambridge 02139

Assigned schools

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