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Single Family ResidenceResidential
$663,305$346 / 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 Oct 21, 2026

427 MAIN ST

ACTON, MA 01720
2
Beds
2
Baths
1,918 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.
1875
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

$663K
$595K low$732K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,909 (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.$636,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$315,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$320,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$763,515

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.Historical
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.50
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
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Luther Conant Elementary SchoolA+
Elementary · Grades KG–6 · 0.6 mi
H
Acton - Boxborough Regional High SchoolA+
High · Grades 9–12 · 1.1 mi
M
R. J. Grey Junior High SchoolA+
Middle · Grades 7–8 · 1.1 mi

District: Acton-Boxborough School District

Neighborhood · ZIP 01720These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.72

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.24,473
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,210 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$148,952
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$187,397
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

427 Main 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 73% of homes in Acton 01720
  • Costs less per square foot than 85% of homes in Acton 01720
  • Has a smaller lot than 70% of homes in Acton 01720
  • Older than 97% of homes in Acton 01720

What homes are worth in Acton 01720

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

This home
$225K$1.7M

This home is worth more than 27% of homes in Acton 01720.

How it measures up in Acton 01720

The dot is this home. The mark in the middle is the typical home in Acton 01720.

Estimated value$663,305
CheaperTypical $843,855Pricier

Pricier than 27% of homes nearby

Price per ft²$346
CheaperTypical $402Pricier

Pricier than 15% of homes nearby

Living area1,918 ft²
SmallerTypical 2,085 ft²Bigger

Bigger than 43% of homes nearby

Lot size0.5 ac
SmallerTypical 0.73 acBigger

Bigger than 30% of homes nearby

Year built1875
OlderTypical 1971Newer

Newer than 3% of homes nearby

How 427 Main St ranks against every home in each area.
MeasureThis homeActon 01720Middlesex County
Estimated valuepricier than$663,30527% of homes35% of homes
Price per ft²pricier than$34615% of homes19% of homes
Living areabigger than1,918 ft²43% of homes53% of homes
Lot sizebigger than0.5 ac30% of homes64% of homes
Year builtnewer than18753% of homes3% of homes

About 427 Main St

How much is 427 Main St, Acton, MA worth?

The TopHap Estimate for 427 Main St, Acton, MA is $663,305 as of Oct 21, 2026. The likely range is $595,103 to $731,507. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 427 Main St, Acton, MA last sell?

427 Main St, Acton, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 427 Main St, Acton, MA?

427 Main St, Acton, MA has 2 bedrooms, 2 bathrooms, 1,918 square feet of living space and a 0.50-acre lot.

When was 427 Main St, Acton, MA built?

427 Main St, Acton, MA was built in 1875, making it 151 years old. It is a historical home. The building has 2 stories.

What schools serve 427 Main St, Acton, MA?

427 Main St, Acton, MA is assigned to Luther Conant Elementary School (elementary), rated A+; Acton - Boxborough Regional High School (high), rated A+; R. J. Grey Junior High School (middle), rated A+. All sit in Acton-Boxborough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 427 Main St, Acton, MA compare to other homes in Acton 01720?

Among the 7,508 homes in Acton 01720, it is worth more than 27% of them ($663,305 against a typical $843,855), its price per square foot is higher than 15% of them ($346 against a typical $402), it is bigger than 43% of them (1,918 ft² against a typical 2,085 ft²), its lot is bigger than 30% of them (0.5 ac against a typical 0.73 ac) and it is newer than 3% of them (1875 against a typical 1971). Measured against all of Middlesex County, it is worth more than 35% 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 427 Main St, Acton, MA?

The 2025 property tax bill for 427 Main St, Acton, MA was $10,909. The county assessed it at $636,100.

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