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Commercial Building, Mail Order, Show Room (Non-Auto), WarehouseCommercial

321 MAIN ST

ACTON, MA 01720
4
Baths
26,033 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.
1.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1958
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$46,710 (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.$2,723,600 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$567,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,156,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,668,000

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.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Commercial Building, Mail Order, Show Room (Non-Auto), Warehouse
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.1.40
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.Metal
HeatingThe type of heating system in the home.Forced Air
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

Transaction History(5)

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
Merriam Elementary SchoolB
Elementary · Grades KG–6 · 0.2 mi
M
R. J. Grey Junior High SchoolA
Middle · Grades 7–8 · 0.4 mi
H
Acton - Boxborough Regional High SchoolA
High · Grades 9–12 · 0.5 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

321 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.

  • Among the largest homes in Acton 01720
  • Has a bigger lot than 85% of homes in Middlesex County
  • Older than 80% 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.

Living area26,033 ft²
SmallerTypical 2,087 ft²Bigger

Bigger than almost all homes nearby

Lot size1.4 ac
SmallerTypical 0.71 acBigger

Bigger than 69% of homes nearby

Year built1958
OlderTypical 1971Newer

Newer than 20% of homes nearby

How 321 Main St ranks against every home in each area.
MeasureThis homeActon 01720Middlesex County
Living areabigger than26,033 ft²almost all homesalmost all homes
Lot sizebigger than1.4 ac69% of homes85% of homes
Year builtnewer than195820% of homes51% of homes

About 321 Main St

When did 321 Main St, Acton, MA last sell?

321 Main St, Acton, MA last sold on Nov 28, 1995, according to the county's recorded deed.

How big is 321 Main St, Acton, MA?

321 Main St, Acton, MA has 4 bathrooms, 26,033 square feet of living space and a 1.40-acre lot.

When was 321 Main St, Acton, MA built?

321 Main St, Acton, MA was built in 1958, making it 68 years old. The building has 2 stories.

What schools serve 321 Main St, Acton, MA?

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

How does 321 Main St, Acton, MA compare to other homes in Acton 01720?

Among the 7,508 homes in Acton 01720, it is bigger than almost all of them (26,033 ft² against a typical 2,087 ft²), its lot is bigger than 69% of them (1.4 ac against a typical 0.71 ac) and it is newer than 20% of them (1958 against a typical 1971). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 321 Main St, Acton, MA?

The 2025 property tax bill for 321 Main St, Acton, MA was $46,710. The county assessed it at $2,723,600.

More homes on Main St

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Assigned schools

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