Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
Last sold for $711,000 on Oct 23, 2015

19 MONUMENT SQ

CHARLESTOWN, MA 02129
1,061 ft²
Lot SizeThe size of the land the home sits on, from county records.
2000
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 18993 units518–2,058 ft²
$4.2M
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.
$912K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$993
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+20.9%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.
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.
+7.7%per yeartypical hold 4.4 yrsfrom 10 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
19962000200120022008201220152022
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
19962000200120022008201220152022

14 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
2 bed
2 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.

$514K–$514K
1 unit
$912K–$912K
1 unit
$2.8M–$2.8M
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.0%
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.4.3 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.25%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$776,677
Median tax billThe middle annual property tax bill among the building's units.$9,490
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 BJun 17, 2022$2,500,000Unit AJun 17, 2022$2,500,000BuildingOct 23, 2015$711,000BuildingNov 19, 2012$569,000Unit COct 30, 2012$523,250Unit AMar 1, 2012$1,250,000BuildingJun 30, 2008$425,000Unit CApr 16, 2004$470,000Unit CMar 18, 2002$404,000Unit BJan 16, 2002$209,000

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.$11,268 (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.$973,100 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$973,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,174,960

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountySUFFOLK
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2012
Lot (acres)The size of the land the home sits on, from county records.0.02
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(5)

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
Harvard / Kent Elementary SchoolC-
Elementary · Grades PK–5 · 0.1 mi
H
Charlestown High SchoolD+
High · Grades 9–12 · 0.2 mi
M
Warren / Prescott K-8 SchoolA-
Middle · Grades PK–8 · 0.2 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.

19 Monument Sq
2 bd · 1 ba · 1,066 ft²
$1.1M
19 Monument Sq # A
2 bd · 2.5 ba · 2,058 ft²
$2.8M
19 Monument Sq # B
2 bd · 1 ba · 518 ft²
$514K
19 Monument Sq # C
1 bd · 1 ba · 957 ft²
$912K

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

About 19 Monument Sq

How many units are in 19 Monument Sq, Charlestown, MA?

19 Monument Sq, Charlestown, MA has 3 residential units across built in 1899, according to county assessor records.

What is a unit at 19 Monument Sq, Charlestown, MA worth?

The median TopHap Estimate across the 3 units at 19 Monument Sq, Charlestown, MA is $911,838. That works out to $993 per square foot. Units run from 518 to 2,058 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 19 Monument Sq, Charlestown, MA expensive for Charlestown?

Units at 19 Monument Sq, Charlestown, MA carry a median of $993 per square foot, 21% above the Charlestown median of $821 per square foot.

How often do units sell at 19 Monument Sq, Charlestown, MA?

0 units at 19 Monument Sq, Charlestown, MA sold in the last 12 months, out of 14 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 19 Monument Sq, Charlestown, MA appreciated?

Across 10 repeat sales of the same unit, 19 Monument Sq, Charlestown, MA returned a median 7.7% 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 4.4 years.

More homes on Monument Sq

Closest homes

More homes in Charlestown 02129

Assigned schools

Explore the area

See this home in context

Open 19 Monument Sq on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map