CondominiumResidential
20 Chestnut St
CHARLESTOWN, MA 02129
805 ft²
Lot SizeThe size of the land the home sits on, from county records.
1860
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 18603 units695–1,550 ft²
$2.5M
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.
$794K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$987
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.
+20.2%vs the Charlestown ZIP median sale $/ft² ($821)
Sales Performance
—
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
198919911998200520212025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
198919911998200520212025
6 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.
1 bed
1 unit$686K · $987/ft²
2 bed
2 units$927K · $835/ft²
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.
$686K–$686K
1 unit
$794K–$794K
1 unit
$1.1M–$1.1M
1 unit
Ownership & Financing
Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.100%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.0%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.5.2 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.0%
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.77%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$768,828
Median tax billThe middle annual property tax bill among the building's units.$7,649
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.
Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.
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.34
1
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.
53
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
84
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.
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
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
Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.
EMH
Harvard / Kent Elementary SchoolC-
Elementary · Grades PK–5 · 0.2 mi
Warren / Prescott K-8 SchoolA-
Middle · Grades PK–8 · 0.4 mi
Charlestown High SchoolD+
High · Grades 9–12 · 0.4 mi
District: Boston School District
Neighborhood · ZIP 02129These 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.89
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.3%
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.18,397
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10,594 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$152,177
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$178,903
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.46 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.
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, Charlestown, MA?
20 Chestnut St, Charlestown, MA has 3 residential units across built in 1860, according to county assessor records.
What is a unit at 20 Chestnut St, Charlestown, MA worth?
The median TopHap Estimate across the 3 units at 20 Chestnut St, Charlestown, MA is $794,185. That works out to $987 per square foot. Units run from 695 to 1,550 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.
Is 20 Chestnut St, Charlestown, MA expensive for Charlestown?
Units at 20 Chestnut St, Charlestown, MA carry a median of $987 per square foot, 20% above the Charlestown median of $821 per square foot.
How often do units sell at 20 Chestnut St, Charlestown, MA?
0 units at 20 Chestnut St, Charlestown, MA sold in the last 12 months, out of 6 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.
Have units at 20 Chestnut St, Charlestown, MA appreciated?
Across 3 repeat sales of the same unit, 20 Chestnut St, Charlestown, MA returned a median 5.6% 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 16.2 years.
More homes on Chestnut St
- 18 Chestnut St3 bd · 2 ba · 2,053 ft² · Sold $1.4M · May 2025
- 27 Chestnut St # 207$1.7M3 bd · 1.5 ba · 1,572 ft² · Sold $1.6M · May 2025
- 20 Chestnut St # 1$1.1M2 bd · 2 ba · 1,550 ft² · Sold $1M · Apr 2025
- 27 Chestnut St # 203$1.3M2 bd · 2 ba · 1,123 ft² · Sold $1.2M · Dec 2024
- 27 Chestnut St # 209$1.5M3 bd · 1.5 ba · 1,572 ft² · Sold $1.3M · Oct 2023
- 30 Chestnut St # 3$818K2 bd · 1 ba · 855 ft² · Sold $700K · Nov 2022
- 28 Chestnut St # 1$2.1M2 bd · 1.5 ba · 1,830 ft² · Sold $1.5M · Aug 2022
- 27 Chestnut St # 110$1.3M2 bd · 1.5 ba · 1,084 ft² · Sold $1.1M · Aug 2022
- 43 Chestnut St5 bd · 3.5 ba · 3,033 ft² · Sold $2.2M · Jul 2022
- 66 Chestnut St # 2$817K2 bd · 1 ba · 850 ft² · Sold $650K · Jun 2022
- 27 Chestnut St # 208$1.6M3 bd · 2.5 ba · 1,577 ft² · Sold $1.2M · Jun 2022
- 27 Chestnut St # 108$1.1M2 bd · 2 ba · 1,057 ft² · Sold $930K · Jun 2021
Closest homes
- 20 Chestnut St$686K0 ft · 1 bd · 1 ba · 695 ft² · Sold $420K · Aug 2015
- 20 Chestnut St$1.1M0 ft · 2 bd · 2 ba · 1,550 ft² · Sold $1M · Apr 2025
- 18 Chestnut St22 ft · 3 bd · 2 ba · 2,053 ft² · Sold $1.4M · May 2025
- 20 Adams St$1.4M27 ft · 2 bd · 2 ba · 1,213 ft² · Sold $730K · Jul 2014
- 20 Adams St$1.6M27 ft · 2 bd · 2 ba · 1,339 ft² · Sold $1.2M · Jun 2022
- 20 Adams St Apt 1$1.2M27 ft · 2 bd · 2 ba · 1,227 ft² · Sold $555K · Oct 2002
- 16 Chestnut St$1.5M44 ft · 4 bd · 1.5 ba · 2,090 ft² · Sold Jan 1900
- 14 Chestnut St66 ft · 4 bd · 3 ba · 2,042 ft²
More homes in Charlestown 02129
- 11 Lawnwood Pl$2.5M4 bd · 4.5 ba · 2,180 ft² · Sold $2.3M · Sep 2026
- 30 Tremont St5 bd · 3 ba · 2,981 ft² · Sold $1.8M · Sep 2026
- 20 Lawrence St$810K2 bd · 2 ba · 1,155 ft² · Sold $810K · Sep 2026
- 16 Trenton St$699K2 bd · 1 ba · 703 ft² · Sold $690K · Sep 2026
- 106 13th St$569K1 bd · 1 ba · 733 ft² · Sold $569K · Sep 2026
- 377 Bunker Hill St$608K1 bd · 1 ba · 717 ft² · Sold $589K · Sep 2026
- 30 Monument Sq$825K1 bd · 1 ba · 885 ft² · Sold $825K · Sep 2026
- 21 Tremont St$635K1 bd · 1 ba · 681 ft² · Sold $575K · Sep 2026
- 92 Green St$550K1 bd · 1 ba · 702 ft² · Sold $550K · Sep 2026
- 30 Sackville St$855K2 bd · 2 ba · 937 ft² · Sold $855K · Sep 2026
- 27 Parker St$780K2 bd · 1.5 ba · 1,029 ft² · Sold $780K · Sep 2026
- 21 Prospect St$1M3 bd · 2 ba · 905 ft² · Sold $1M · Sep 2026
Assigned schools
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