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Single Family ResidenceResidential
$364,286$175 / 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 93How 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 $12,500 on Feb 5, 2025

21 WEST ST

PETERSHAM, MA 01366
3
Beds
1.5
Baths
2,082 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.
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$364K
$338K low$391K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$12,500 · Feb 5, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,345 (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.$368,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$45,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$323,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$323,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$338,960

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.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
54
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
92
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
36
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

Scores 0–100; higher = greater projected risk.

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.Colonial
CountyWORCESTER
Lot (acres)The size of the land the home sits on, from county records.0.27
ConstructionThe main material the home's frame and walls are built from.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(17)

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
Petersham CenterA
Elementary · Grades KG–6 · 0.2 mi
M
Ralph C. Mahar Regional High SchoolC
Middle · Grades 7–12 · 8.3 mi

District: Ralph C. Mahar School District

Neighborhood · ZIP 01366These 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.138
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.53

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.87%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.819
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.18 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$104,718
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,158
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

21 West 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 81% of homes in Worcester County
  • Costs less per square foot than 97% of homes in Worcester County
  • Bigger than 67% of homes in Worcester County
  • Among the smallest lots in Petersham 01366
  • Newer than 69% of homes in Worcester County

What homes are worth in Petersham 01366

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

This home
$199K$711K

This home is worth more than 40% of homes in Petersham 01366.

How it measures up in Petersham 01366

The dot is this home. The mark in the middle is the typical home in Petersham 01366.

Estimated value$364,286
CheaperTypical $394,341Pricier

Pricier than 40% of homes nearby

Price per ft²$175
CheaperTypical $214Pricier

Pricier than 28% of homes nearby

Living area2,082 ft²
SmallerTypical 1,824 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.27 ac
SmallerTypical 3.64 acBigger

Smaller than almost all homes nearby

Year built1987
OlderTypical 1968Newer

Newer than 64% of homes nearby

How 21 West St ranks against every home in each area.
MeasureThis homePetersham 01366Worcester County
Estimated valuepricier than$364,28640% of homes19% of homes
Price per ft²pricier than$17528% of homes3% of homes
Living areabigger than2,082 ft²61% of homes67% of homes
Lot sizebigger than0.27 acalmost no homes29% of homes
Year builtnewer than198764% of homes69% of homes

About 21 West St

How much is 21 West St, Petersham, MA worth?

The TopHap Estimate for 21 West St, Petersham, MA is $364,286 as of Aug 30, 2026. The likely range is $337,580 to $390,992. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 West St, Petersham, MA last sell?

21 West St, Petersham, MA last sold on Feb 5, 2025 for $12,500, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 21 West St, Petersham, MA?

21 West St, Petersham, MA has 3 bedrooms, 1.5 bathrooms, 2,082 square feet of living space and a 0.27-acre lot.

When was 21 West St, Petersham, MA built?

21 West St, Petersham, MA was built in 1987, making it 39 years old. It is a colonial home. The building has 2 stories.

What schools serve 21 West St, Petersham, MA?

21 West St, Petersham, MA is assigned to Petersham Center (elementary), rated A; Ralph C. Mahar Regional High School (middle), rated C. All sit in Ralph C. Mahar School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 West St, Petersham, MA compare to other homes in Petersham 01366?

Among the 552 homes in Petersham 01366, it is worth more than 40% of them ($364,286 against a typical $394,341), its price per square foot is higher than 28% of them ($175 against a typical $214), it is bigger than 61% of them (2,082 ft² against a typical 1,824 ft²), its lot is bigger than almost none of them (0.27 ac against a typical 3.64 ac) and it is newer than 64% of them (1987 against a typical 1968). Measured against all of Worcester County, it is worth more than 19% 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 21 West St, Petersham, MA?

The 2025 property tax bill for 21 West St, Petersham, MA was $5,345. The county assessed it at $368,900.

More homes on West St

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