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CondominiumResidential
Last sold for $310,000 on Nov 8, 2013

20 CHESTNUT ST

CAMBRIDGE, MA 02139
1989
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.
Built 198961 units409–1,070 ft²
$49M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$851K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$887
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-11.1%vs the Cambridge ZIP median sale $/ft² ($998)

Sales Performance

$525K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
-39.1%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
1.6%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+5.2%per yeartypical hold 7.3 yrsfrom 113 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19891994199920042010201520212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19891994199920042010201520212026

179 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$292K$525K$757K$989K409 ft²541 ft²673 ft²806 ft²938 ft²1,070 ft²
1 bd2 bd3 bd
1 bed
9 units
2 bed
51 units
3 bed
1 unit
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1.5 ba · 933 ft²
4 units
2 bd · 2 ba · 937 ft²
4 units
2 bd · 2 ba · 939 ft²
4 units
2 bd · 2 ba · 1,069 ft²
4 units
2 bd · 2 ba · 1,070 ft²
4 units
1 bd · 1 ba · 803 ft²
3 units
1 bd · 1 ba · 822 ft²
3 units
2 bd · 2 ba · 966 ft²
3 units
2 bd · 2 ba · 986 ft²
3 units
2 bd · 2 ba · 1,041 ft²
3 units
2 bd · 2 ba · 1,067 ft²
3 units
2 bd · 1.5 ba · 931 ft²
2 units
2 bd · 2 ba · 980 ft²
2 units
One-off layouts
19 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$292K–$372K
4 units
$439K–$439K
1 unit
$526K–$548K
2 units
$690K–$712K
6 units
$764K–$814K
9 units
$823K–$901K
23 units
$902K–$989K
16 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.56%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.11%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.17.1 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.44%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.25%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$867,023
Median tax billThe middle annual property tax bill among the building's units.$4,689
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 11Jun 12, 2026$525,000Unit 37May 9, 2025$862,500Unit 46May 24, 2024$965,000Unit 41Nov 17, 2023$800,000Unit 12Nov 16, 2023$649,000Unit 14Feb 28, 2023$165,000Unit 17Dec 16, 2022$111,017Unit 11Nov 22, 2022$510,000Unit 70Oct 21, 2022$605,000Unit 33Oct 6, 2021$765,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,169 (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.$499,000 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$499,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$478,200

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.41
25
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.48 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.26%
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
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMiddlesex
HeatingThe type of heating system in the home.Forced Air
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(11)

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
MorseB
Elementary · Grades PK–5 · 0.3 mi
M
Amigos SchoolA
Middle · Grades PK–8 · 0.5 mi
H
Cambridge Rindge and LatinA-
High · Grades 9–12 · 1.3 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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

20 Chestnut St
1 bd · 1 ba · 535 ft²
$568K
20 Chestnut St # 1
1 bd · 1 ba · 537 ft²
$548K
20 Chestnut St # 9
1 bd · 1 ba · 409 ft²
$439K
20 Chestnut St # 11
1 bd · 1 ba · 535 ft²
$526K
20 Chestnut St # 12
2 bd · 1 ba · 815 ft²
$690K
20 Chestnut St # 13
2 bd · 1 ba · 897 ft²
$343K
20 Chestnut St # 14
2 bd · 1 ba · 887 ft²
$327K
20 Chestnut St # 15
2 bd · 1 ba · 833 ft²
$372K
20 Chestnut St # 16
2 bd · 1 ba · 857 ft²
$834K
20 Chestnut St # 17
2 bd · 1 ba · 875 ft²
$292K
20 Chestnut St # 18
2 bd · 1 ba · 893 ft²
$899K
20 Chestnut St # 19
2 bd · 1 ba · 806 ft²
$799K
20 Chestnut St # 21
2 bd · 2 ba · 937 ft²
$807K
20 Chestnut St # 22
2 bd · 2 ba · 1,070 ft²
$918K
20 Chestnut St # 23
2 bd · 1.5 ba · 931 ft²
$850K
20 Chestnut St # 24
2 bd · 2 ba · 966 ft²
$850K
20 Chestnut St # 25
2 bd · 2 ba · 986 ft²
$890K
20 Chestnut St # 26
2 bd · 1.5 ba · 933 ft²
$825K
20 Chestnut St # 27
2 bd · 2 ba · 1,069 ft²
$951K
20 Chestnut St # 28
2 bd · 2 ba · 939 ft²
$902K
20 Chestnut St # 29
2 bd · 2 ba · 937 ft²
$921K
20 Chestnut St # 30
2 bd · 2 ba · 1,070 ft²
$856K
20 Chestnut St # 31
2 bd · 1.5 ba · 931 ft²
$814K
20 Chestnut St # 32
2 bd · 2 ba · 966 ft²
$859K
20 Chestnut St # 33
2 bd · 2 ba · 986 ft²
$887K
20 Chestnut St # 34
2 bd · 1.5 ba · 933 ft²
$809K
20 Chestnut St # 35
2 bd · 2 ba · 1,069 ft²
$851K
20 Chestnut St # 36
2 bd · 2 ba · 939 ft²
$814K
20 Chestnut St # 37
2 bd · 2 ba · 937 ft²
$871K
20 Chestnut St # 38
2 bd · 2 ba · 1,070 ft²
$902K
20 Chestnut St # 39
2 bd · 2.5 ba · 931 ft²
$855K
20 Chestnut St # 40
2 bd · 2 ba · 966 ft²
$938K
20 Chestnut St # 41
2 bd · 2 ba · 986 ft²
$869K
20 Chestnut St # 42
2 bd · 1.5 ba · 933 ft²
$847K
20 Chestnut St # 43
2 bd · 2 ba · 1,069 ft²
$906K
20 Chestnut St # 44
2 bd · 2 ba · 939 ft²
$914K
20 Chestnut St # 45
2 bd · 2 ba · 937 ft²
$910K
20 Chestnut St # 46
2 bd · 2 ba · 1,070 ft²
$987K
20 Chestnut St # 47
3 bd · 1.5 ba · 931 ft²
$904K
20 Chestnut St # 48
2 bd · 2 ba · 917 ft²
$894K
20 Chestnut St # 49
2 bd · 2 ba · 938 ft²
$901K
20 Chestnut St # 50
2 bd · 1.5 ba · 933 ft²
$899K
20 Chestnut St # 51
2 bd · 2 ba · 1,069 ft²
$919K
20 Chestnut St # 52
2 bd · 2 ba · 939 ft²
$844K
20 Chestnut St # 54
2 bd · 2.5 ba · 959 ft²
$865K
20 Chestnut St # 55
2 bd · 2 ba · 980 ft²
$785K
20 Chestnut St # 57
2 bd · 1 ba · 878 ft²
$772K
20 Chestnut St # 58
2 bd · 2 ba · 959 ft²
$823K
20 Chestnut St # 59
2 bd · 2 ba · 980 ft²
$876K
20 Chestnut St # 60
2 bd · 1 ba · 880 ft²
$771K
20 Chestnut St # 61
2 bd · 2 ba · 1,041 ft²
$840K
20 Chestnut St # 62
1 bd · 1 ba · 803 ft²
$693K
20 Chestnut St # 63
1 bd · 1 ba · 822 ft²
$695K
20 Chestnut St # 64
2 bd · 2 ba · 1,067 ft²
$924K
20 Chestnut St # 65
2 bd · 2 ba · 1,041 ft²
$901K
20 Chestnut St # 66
1 bd · 1 ba · 803 ft²
$712K
20 Chestnut St # 67
1 bd · 1 ba · 822 ft²
$704K
20 Chestnut St # 68
2 bd · 2 ba · 1,067 ft²
$989K
20 Chestnut St # 69
2 bd · 2 ba · 1,041 ft²
$933K
20 Chestnut St # 70
1 bd · 1 ba · 803 ft²
$698K
20 Chestnut St # 71
1 bd · 1 ba · 822 ft²
$764K
20 Chestnut St # 72
2 bd · 2 ba · 1,067 ft²
$944K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 20 Chestnut St

How many units are in 20 Chestnut St, Cambridge, MA?

20 Chestnut St, Cambridge, MA has 61 residential units across built in 1989, according to county assessor records.

What is a unit at 20 Chestnut St, Cambridge, MA worth?

The median TopHap Estimate across the 61 units at 20 Chestnut St, Cambridge, MA is $851,194. That works out to $887 per square foot. Units run from 409 to 1,070 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 20 Chestnut St, Cambridge, MA expensive for Cambridge?

Units at 20 Chestnut St, Cambridge, MA carry a median of $887 per square foot, 11% below the Cambridge median of $998 per square foot.

How often do units sell at 20 Chestnut St, Cambridge, MA?

1 units at 20 Chestnut St, Cambridge, MA sold in the last 12 months, out of 179 recorded arms-length sales all time. That is a turnover rate of 1.6% of the building per year. The median sale over that period was $525K.

Have units at 20 Chestnut St, Cambridge, MA appreciated?

Across 113 repeat sales of the same unit, 20 Chestnut St, Cambridge, MA returned a median 5.2% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 7.3 years.

What floor plans does 20 Chestnut St, Cambridge, MA have?

The most common plan at 20 Chestnut St, Cambridge, MA is a 2-bedroom of 933 square feet, repeated 4 times, with a median estimate of $835,944. TopHap identifies 13 recurring plans in the building.

More homes on Chestnut St

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Assigned schools

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