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Single Family ResidenceResidential
$775,107$190 / 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 97How 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 $389,000 on Mar 16, 2017

129 N UNION ST

PLAINFIELD, MA 01070
4
Beds
1.5
Baths
4,084 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.
25.05 ac
Lot SizeThe size of the land the home sits on, from county records.
1989
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$775K
$754K low$797K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$389,000 · Mar 16, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,320 (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.$883,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$72,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$810,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$619,495

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.12 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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.Contemporary
CountyHAMPSHIRE
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.1995
Lot (acres)The size of the land the home sits on, from county records.25.05
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.Slate
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
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, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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
Sanderson AcademyC
Elementary · Grades PK–6 · 5.3 mi
M
Mohawk Trail Regional SchoolC-
Middle · Grades 7–12 · 9.5 mi

District: Mohawk Trail School District

Neighborhood · ZIP 01070These 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.166
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.85%
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.9.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.692
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.29 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$78,448
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,934
Average tempThe average temperature here across a full year.44°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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

129 N 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.

  • Among the most valuable homes in Plainfield 01070
  • Costs less per square foot than 91% of homes in Hampshire County
  • Among the largest homes in Plainfield 01070
  • Has a bigger lot than 97% of homes in Hampshire County
  • Newer than 77% of homes in Hampshire County

What homes are worth in Plainfield 01070

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

This home
$99K$605K

This home is worth more than almost all homes in Plainfield 01070.

How it measures up in Plainfield 01070

The dot is this home. The mark in the middle is the typical home in Plainfield 01070.

Estimated value$775,107
CheaperTypical $280,797Pricier

Pricier than almost all homes nearby

Price per ft²$190
CheaperTypical $183Pricier

Pricier than 53% of homes nearby

Living area4,084 ft²
SmallerTypical 1,676 ft²Bigger

Bigger than almost all homes nearby

Lot size25.05 ac
SmallerTypical 5.61 acBigger

Bigger than 86% of homes nearby

Year built1989
OlderTypical 1974Newer

Newer than 75% of homes nearby

How 129 N Union St ranks against every home in each area.
MeasureThis homePlainfield 01070Hampshire County
Estimated valuepricier than$775,107almost all homes94% of homes
Price per ft²pricier than$19053% of homes9% of homes
Living areabigger than4,084 ft²almost all homes98% of homes
Lot sizebigger than25.05 ac86% of homes97% of homes
Year builtnewer than198975% of homes77% of homes

About 129 N Union St

How much is 129 N Union St, Plainfield, MA worth?

The TopHap Estimate for 129 N Union St, Plainfield, MA is $775,107 as of Aug 30, 2026. The likely range is $753,588 to $796,626. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 129 N Union St, Plainfield, MA last sell?

129 N Union St, Plainfield, MA last sold on Mar 16, 2017 for $389,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 129 N Union St, Plainfield, MA?

129 N Union St, Plainfield, MA has 4 bedrooms, 1.5 bathrooms, 4,084 square feet of living space and a 25.05-acre lot.

When was 129 N Union St, Plainfield, MA built?

129 N Union St, Plainfield, MA was built in 1989, making it 37 years old. It is a contemporary home. The building has 2 stories.

What schools serve 129 N Union St, Plainfield, MA?

129 N Union St, Plainfield, MA is assigned to Sanderson Academy (elementary), rated C; Mohawk Trail Regional School (middle), rated C-. All sit in Mohawk Trail School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 129 N Union St, Plainfield, MA compare to other homes in Plainfield 01070?

Among the 323 homes in Plainfield 01070, it is worth more than almost all of them ($775,107 against a typical $280,797), its price per square foot is higher than 53% of them ($190 against a typical $183), it is bigger than almost all of them (4,084 ft² against a typical 1,676 ft²), its lot is bigger than 86% of them (25.05 ac against a typical 5.61 ac) and it is newer than 75% of them (1989 against a typical 1974). Measured against all of Hampshire County, it is worth more than 94% 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 129 N Union St, Plainfield, MA?

The 2025 property tax bill for 129 N Union St, Plainfield, MA was $16,320. The county assessed it at $883,100.

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