Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$298,042$172 / 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 96How 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 $80,000 on May 8, 2017

42 UNION ST

GREENFIELD, MA 01301
4
Beds
1
Baths
1,734 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.
1900
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

$298K
$286K low$310K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$80,000 · May 8, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,054 (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.$258,400 (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.$191,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$320,245

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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Federal Street SchoolB
Elementary · Grades KG–4 · 0.1 mi
M
Greenfield Middle SchoolC+
Middle · Grades 5–7 · 0.3 mi
H
Greenfield High SchoolD-
High · Grades 8–12 · 0.9 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%

Owner Tools

Do you own this home?
Claim this home

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

42 Union 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 70% of homes in Franklin County
  • Costs less per square foot than 85% of homes in Franklin County
  • Has a smaller lot than 80% of homes in Franklin County
  • Older than 76% 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$614K

This home is worth more than 44% 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$298,042
CheaperTypical $312,853Pricier

Pricier than 44% of homes nearby

Price per ft²$172
CheaperTypical $215Pricier

Pricier than 17% of homes nearby

Living area1,734 ft²
SmallerTypical 1,568 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.28 ac
SmallerTypical 0.31 acBigger

Bigger than 45% of homes nearby

Year built1900
OlderTypical 1935Newer

Newer than 31% of homes nearby

How 42 Union St ranks against every home in each area.
MeasureThis homeGreenfield 01301Franklin County
Estimated valuepricier than$298,04244% of homes30% of homes
Price per ft²pricier than$17217% of homes15% of homes
Living areabigger than1,734 ft²61% of homes56% of homes
Lot sizebigger than0.28 ac45% of homes20% of homes
Year builtnewer than190031% of homes24% of homes

About 42 Union St

How much is 42 Union St, Greenfield, MA worth?

The TopHap Estimate for 42 Union St, Greenfield, MA is $298,042 as of Sep 24, 2026. The likely range is $285,896 to $310,188. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 42 Union St, Greenfield, MA last sell?

42 Union St, Greenfield, MA last sold on May 8, 2017 for $80,000, according to the county's recorded deed.

How big is 42 Union St, Greenfield, MA?

42 Union St, Greenfield, MA has 4 bedrooms, 1 bathrooms, 1,734 square feet of living space and a 0.28-acre lot.

When was 42 Union St, Greenfield, MA built?

42 Union St, Greenfield, MA was built in 1900, making it 126 years old. The building has 2 stories.

What schools serve 42 Union St, Greenfield, MA?

42 Union St, 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 42 Union St, Greenfield, MA compare to other homes in Greenfield 01301?

Among the 5,439 homes in Greenfield 01301, it is worth more than 44% of them ($298,042 against a typical $312,853), its price per square foot is higher than 17% of them ($172 against a typical $215), it is bigger than 61% of them (1,734 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 31% of them (1900 against a typical 1935). Measured against all of Franklin County, it is worth more than 30% 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 42 Union St, Greenfield, MA?

The 2025 property tax bill for 42 Union St, Greenfield, MA was $5,054. The county assessed it at $258,400.

More homes on Union St

Closest homes

More homes in Greenfield 01301

Assigned schools

Explore the area

See this home in context

Open 42 Union St 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