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CondominiumResidential
$575,955$673 / 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 77How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $89,000 on Oct 31, 1994

257 MAIN ST

CHARLESTOWN, MA 02129
Building report
2
Beds
1
Baths
856 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.
856 ft²
Lot SizeThe size of the land the home sits on, from county records.
1900
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

$576K
$441K low$711K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$89,000 · Oct 31, 1994

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,239 (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.$366,100 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$366,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$495,140

Climate Risk

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.27%
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
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.1994
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

Transaction History(2)

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
Warren / Prescott K-8 SchoolA-
Elementary · Grades PK–8 · 0.1 mi
H
Horace Mann School For The DeafF
High · Grades PK–12 · 0.1 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%

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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

257 Main 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 91% of homes in Charlestown 02129
  • Costs less per square foot than 95% of homes in Charlestown 02129
  • Smaller than 80% of homes in Suffolk County
  • Has a smaller lot than 81% of homes in Suffolk County
  • Older than 69% of homes in Suffolk County

What homes are worth in Charlestown 02129

Each bar is how many homes fall in that price range. The marker is this home.

This home
$450K$2.9M

This home is worth more than 9% of homes in Charlestown 02129.

How it measures up in Charlestown 02129

The dot is this home. The mark in the middle is the typical home in Charlestown 02129.

Estimated value$575,955
CheaperTypical $1,038,686Pricier

Pricier than 9% of homes nearby

Price per ft²$673
CheaperTypical $943Pricier

Pricier than 5% of homes nearby

Living area856 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 25% of homes nearby

Lot size856 ft²
SmallerTypical 1,133 ft²Bigger

Bigger than 27% of homes nearby

Year built1900
OlderTypical 1899Newer

Newer than 65% of homes nearby

How 257 Main St ranks against every home in each area.
MeasureThis homeCharlestown 02129Suffolk County
Estimated valuepricier than$575,9559% of homes29% of homes
Price per ft²pricier than$6735% of homes56% of homes
Living areabigger than856 ft²25% of homes20% of homes
Lot sizebigger than856 ft²27% of homes19% of homes
Year builtnewer than190065% of homes31% of homes

About 257 Main St

How much is 257 Main St, Charlestown, MA worth?

The TopHap Estimate for 257 Main St, Charlestown, MA is $575,955 as of Sep 24, 2026. The likely range is $440,837 to $711,073. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 257 Main St, Charlestown, MA last sell?

257 Main St, Charlestown, MA last sold on Oct 31, 1994 for $89,000, according to the county's recorded deed.

How big is 257 Main St, Charlestown, MA?

257 Main St, Charlestown, MA has 2 bedrooms, 1 bathrooms, 856 square feet of living space and a 0.02-acre lot.

When was 257 Main St, Charlestown, MA built?

257 Main St, Charlestown, MA was built in 1900, making it 126 years old. The building has 1 story.

What schools serve 257 Main St, Charlestown, MA?

257 Main St, Charlestown, MA is assigned to Warren / Prescott K-8 School (elementary), rated A-; Horace Mann School For The Deaf (high), rated F. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 257 Main St, Charlestown, MA compare to other homes in Charlestown 02129?

Among the 5,261 homes in Charlestown 02129, it is worth more than 9% of them ($575,955 against a typical $1,038,686), its price per square foot is higher than 5% of them ($673 against a typical $943), it is bigger than 25% of them (856 ft² against a typical 1,200 ft²), its lot is bigger than 27% of them (856 ft² against a typical 1,133 ft²) and it is newer than 65% of them (1900 against a typical 1899). Measured against all of Suffolk County, it is worth more than 29% 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 257 Main St, Charlestown, MA?

The 2025 property tax bill for 257 Main St, Charlestown, MA was $4,239. The county assessed it at $366,100.

More homes on Main St

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