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Single Family ResidenceResidential
$426,432$256 / 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 $425,000 on Jul 2, 2026

21 PROSPECT AVE

GREENFIELD, MA 01301
4
Beds
1.5
Baths
1,664 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1915
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$426K
$384K low$469K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$425,000 · Jul 2, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,592 (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.$285,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$66,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$219,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$329,840

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyFRANKLIN
Lot (acres)The size of the land the home sits on, from county records.0.28
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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(8)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Federal Street SchoolB
Elementary · Grades KG–4 · 0.5 mi
M
Greenfield Middle SchoolC+
Middle · Grades 5–7 · 0.8 mi
H
Greenfield High SchoolD-
High · Grades 8–12 · 1.5 mi

District: Greenfield School District

Neighborhood · ZIP 01301These 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.121
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 100.52

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.18,355
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.653 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$57,655
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$74,249
Average tempThe average temperature here across a full year.46°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.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 Prospect Ave 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 more than 86% of homes in Greenfield 01301
  • Costs more per square foot than 80% of homes in Greenfield 01301
  • Has a smaller lot than 81% of homes in Franklin County
  • Older than 72% of homes in Franklin County

What homes are worth in Greenfield 01301

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

This home
$164K$610K

This home is worth more than 86% of homes in Greenfield 01301.

How it measures up in Greenfield 01301

The dot is this home. The mark in the middle is the typical home in Greenfield 01301.

Estimated value$426,432
CheaperTypical $306,826Pricier

Pricier than 86% of homes nearby

Price per ft²$256
CheaperTypical $211Pricier

Pricier than 80% of homes nearby

Living area1,664 ft²
SmallerTypical 1,568 ft²Bigger

Bigger than 56% of homes nearby

Lot size0.28 ac
SmallerTypical 0.31 acBigger

Bigger than 45% of homes nearby

Year built1915
OlderTypical 1935Newer

Newer than 38% of homes nearby

How 21 Prospect Ave ranks against every home in each area.
MeasureThis homeGreenfield 01301Franklin County
Estimated valuepricier than$426,43286% of homes70% of homes
Price per ft²pricier than$25680% of homes68% of homes
Living areabigger than1,664 ft²56% of homes53% of homes
Lot sizebigger than0.28 ac45% of homes19% of homes
Year builtnewer than191538% of homes28% of homes

About 21 Prospect Ave

How much is 21 Prospect Ave, Greenfield, MA worth?

The TopHap Estimate for 21 Prospect Ave, Greenfield, MA is $426,432 as of Aug 30, 2026. The likely range is $384,008 to $468,856. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Prospect Ave, Greenfield, MA last sell?

21 Prospect Ave, Greenfield, MA last sold on Jul 2, 2026 for $425,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 21 Prospect Ave, Greenfield, MA?

21 Prospect Ave, Greenfield, MA has 4 bedrooms, 1.5 bathrooms, 1,664 square feet of living space and a 0.28-acre lot.

When was 21 Prospect Ave, Greenfield, MA built?

21 Prospect Ave, Greenfield, MA was built in 1915, making it 111 years old. The building has 2 stories.

What schools serve 21 Prospect Ave, Greenfield, MA?

21 Prospect Ave, Greenfield, MA is assigned to Federal Street School (elementary), rated B; Greenfield Middle School (middle), rated C+; Greenfield High School (high), rated D-. All sit in Greenfield School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Prospect Ave, Greenfield, MA compare to other homes in Greenfield 01301?

Among the 5,439 homes in Greenfield 01301, it is worth more than 86% of them ($426,432 against a typical $306,826), its price per square foot is higher than 80% of them ($256 against a typical $211), it is bigger than 56% of them (1,664 ft² against a typical 1,568 ft²), its lot is bigger than 45% of them (0.28 ac against a typical 0.31 ac) and it is newer than 38% of them (1915 against a typical 1935). Measured against all of Franklin County, it is worth more than 70% 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 Prospect Ave, Greenfield, MA?

The 2025 property tax bill for 21 Prospect Ave, Greenfield, MA was $5,592. The county assessed it at $285,900.

More homes on Prospect Ave

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Assigned schools

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