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Apartments (Generic)Residential
Last sold for $1,050,000 on Jul 1, 2025

21 MILL ST

SHIRLEY, MA 01464
4
Beds
8.5
Baths
4,964 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.
0.36 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.
26
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,050,000 · Jul 1, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,667 (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.$591,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$130,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$460,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Apartments (Generic)
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.36
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.Electric
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(10)

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
Lura A White Elementary SchoolB-
Elementary · Grades KG–5 · 0.3 mi
M
Ayer Shirley Regional Middle SchoolB
Middle · Grades 6–8 · 0.7 mi
H
Ayer Shirley Regional High SchoolB
High · Grades 9–12 · 4.3 mi

District: Ayer-Shirley School District

Neighborhood · ZIP 01464These 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.89
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

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.96%
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.1.5%
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.7,097
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.449 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$120,824
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$144,771
Average tempThe average temperature here across a full year.47°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

21 Mill 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 Shirley 01464
  • Has a smaller lot than 82% of homes in Shirley 01464
  • Older than 88% of homes in Shirley 01464

How it measures up in Shirley 01464

The dot is this home. The mark in the middle is the typical home in Shirley 01464.

Living area4,964 ft²
SmallerTypical 1,939 ft²Bigger

Bigger than almost all homes nearby

Lot size0.36 ac
SmallerTypical 0.92 acBigger

Bigger than 18% of homes nearby

Year built1900
OlderTypical 1985Newer

Newer than 12% of homes nearby

How 21 Mill St ranks against every home in each area.
MeasureThis homeShirley 01464Middlesex County
Living areabigger than4,964 ft²almost all homes98% of homes
Lot sizebigger than0.36 ac18% of homes55% of homes
Year builtnewer than190012% of homes15% of homes

About 21 Mill St

When did 21 Mill St, Shirley, MA last sell?

21 Mill St, Shirley, MA last sold on Jul 1, 2025 for $1,050,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 21 Mill St, Shirley, MA?

21 Mill St, Shirley, MA has 4 bedrooms, 8.5 bathrooms, 4,964 square feet of living space and a 0.36-acre lot.

When was 21 Mill St, Shirley, MA built?

21 Mill St, Shirley, MA was built in 1900, making it 126 years old. It is a conventional home. The building has 2 stories.

What schools serve 21 Mill St, Shirley, MA?

21 Mill St, Shirley, MA is assigned to Lura A White Elementary School (elementary), rated B-; Ayer Shirley Regional Middle School (middle), rated B; Ayer Shirley Regional High School (high), rated B. All sit in Ayer-Shirley School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Mill St, Shirley, MA compare to other homes in Shirley 01464?

Among the 2,116 homes in Shirley 01464, it is bigger than almost all of them (4,964 ft² against a typical 1,939 ft²), its lot is bigger than 18% of them (0.36 ac against a typical 0.92 ac) and it is newer than 12% of them (1900 against a typical 1985). 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 Mill St, Shirley, MA?

The 2025 property tax bill for 21 Mill St, Shirley, MA was $7,667. The county assessed it at $591,100.

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