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Single Family ResidenceResidential
$264,063$220 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $130,000 on Jul 25, 2012

40 MASON ST

WILLIAMSTOWN, MA 01267
2
Beds
1
Baths
1,200 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.
0.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$264K
$237K low$291K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$130,000 · Jul 25, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,126 (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.$226,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$88,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$138,300
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$226,500

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyBerkshire
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.1979
Lot (acres)The size of the land the home sits on, from county records.0.50
ConstructionThe main material the home's frame and walls are built from.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement

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
Williamstown Elementary SchoolB
Elementary · Grades PK–6 · 1.6 mi
M
Mount Greylock Regional High SchoolB+
Middle · Grades 7–12 · 4.9 mi

District: Mount Greylock School District

Neighborhood · ZIP 01267These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

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.80%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.8,406
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.139 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$101,851
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,416
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.45 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.50%

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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

40 Mason 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 Williamstown 01267
  • Costs less per square foot than 84% of homes in Williamstown 01267
  • Smaller than 81% of homes in Williamstown 01267
  • Newer than 69% of homes in Williamstown 01267

What homes are worth in Williamstown 01267

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

This home
$201K$1.8M

This home is worth more than 9% of homes in Williamstown 01267.

How it measures up in Williamstown 01267

The dot is this home. The mark in the middle is the typical home in Williamstown 01267.

Estimated value$264,063
CheaperTypical $504,326Pricier

Pricier than 9% of homes nearby

Price per ft²$220
CheaperTypical $293Pricier

Pricier than 16% of homes nearby

Living area1,200 ft²
SmallerTypical 1,828 ft²Bigger

Bigger than 19% of homes nearby

Lot size0.5 ac
SmallerTypical 0.73 acBigger

Bigger than 38% of homes nearby

Year built1970
OlderTypical 1955Newer

Newer than 69% of homes nearby

How 40 Mason St ranks against every home in each area.
MeasureThis homeWilliamstown 01267Berkshire County
Estimated valuepricier than$264,0639% of homes22% of homes
Price per ft²pricier than$22016% of homes38% of homes
Living areabigger than1,200 ft²19% of homes22% of homes
Lot sizebigger than0.5 ac38% of homes51% of homes
Year builtnewer than197069% of homes67% of homes

About 40 Mason St

How much is 40 Mason St, Williamstown, MA worth?

The TopHap Estimate for 40 Mason St, Williamstown, MA is $264,063 as of Aug 30, 2026. The likely range is $237,370 to $290,756. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 40 Mason St, Williamstown, MA last sell?

40 Mason St, Williamstown, MA last sold on Jul 25, 2012 for $130,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 40 Mason St, Williamstown, MA?

40 Mason St, Williamstown, MA has 2 bedrooms, 1 bathrooms, 1,200 square feet of living space and a 0.50-acre lot.

When was 40 Mason St, Williamstown, MA built?

40 Mason St, Williamstown, MA was built in 1970, making it 56 years old. It is a ranch home. The building has 1 story.

What schools serve 40 Mason St, Williamstown, MA?

40 Mason St, Williamstown, MA is assigned to Williamstown Elementary School (elementary), rated B; Mount Greylock Regional High School (middle), rated B+. All sit in Mount Greylock School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 40 Mason St, Williamstown, MA compare to other homes in Williamstown 01267?

Among the 2,486 homes in Williamstown 01267, it is worth more than 9% of them ($264,063 against a typical $504,326), its price per square foot is higher than 16% of them ($220 against a typical $293), it is bigger than 19% of them (1,200 ft² against a typical 1,828 ft²), its lot is bigger than 38% of them (0.5 ac against a typical 0.73 ac) and it is newer than 69% of them (1970 against a typical 1955). Measured against all of Berkshire County, it is worth more than 22% 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 40 Mason St, Williamstown, MA?

The 2025 property tax bill for 40 Mason St, Williamstown, MA was $3,126. The county assessed it at $226,500.

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