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Duplex (2 Units, Any Combination)Residential
Last sold for $395,000 on Sep 19, 2014

21 OLNEY ST

BILLERICA, MA 01821
5
Beds
3
Baths
2,570 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.
1.36 ac
Lot SizeThe size of the land the home sits on, from county records.
1983
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$395,000 · Sep 19, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,033 (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.$794,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$372,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$422,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$794,500

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.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Split Entry
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.1.36
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.Forced Air
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, Basement

Transaction History(7)

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
Thomas DitsonC
Elementary · Grades KG–4 · 0.5 mi
M
Locke Middle SchoolB+
Middle · Grades 5–7 · 1.9 mi
H
Billerica Memorial High SchoolC
High · Grades 8–12 · 3.5 mi

District: Billerica School District

Neighborhood · ZIP 01821These 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.40
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.82

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
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.31,495
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,857 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,460
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$152,991
Average tempThe average temperature here across a full year.49°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 Olney 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.

  • Bigger than 82% of homes in Billerica 01821
  • Has a bigger lot than 87% of homes in Billerica 01821
  • Newer than 74% of homes in Middlesex County

How it measures up in Billerica 01821

The dot is this home. The mark in the middle is the typical home in Billerica 01821.

Living area2,570 ft²
SmallerTypical 1,872 ft²Bigger

Bigger than 82% of homes nearby

Lot size1.36 ac
SmallerTypical 0.57 acBigger

Bigger than 87% of homes nearby

Year built1983
OlderTypical 1970Newer

Newer than 73% of homes nearby

How 21 Olney St ranks against every home in each area.
MeasureThis homeBillerica 01821Middlesex County
Living areabigger than2,570 ft²82% of homes76% of homes
Lot sizebigger than1.36 ac87% of homes85% of homes
Year builtnewer than198373% of homes74% of homes

About 21 Olney St

When did 21 Olney St, Billerica, MA last sell?

21 Olney St, Billerica, MA last sold on Sep 19, 2014 for $395,000, according to the county's recorded deed.

How big is 21 Olney St, Billerica, MA?

21 Olney St, Billerica, MA has 5 bedrooms, 3 bathrooms, 2,570 square feet of living space and a 1.36-acre lot.

When was 21 Olney St, Billerica, MA built?

21 Olney St, Billerica, MA was built in 1983, making it 43 years old. It is a split entry home. The building has 1 story.

What schools serve 21 Olney St, Billerica, MA?

21 Olney St, Billerica, MA is assigned to Thomas Ditson (elementary), rated C; Locke Middle School (middle), rated B+; Billerica Memorial High School (high), rated C. All sit in Billerica School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Olney St, Billerica, MA compare to other homes in Billerica 01821?

Among the 10,003 homes in Billerica 01821, it is bigger than 82% of them (2,570 ft² against a typical 1,872 ft²), its lot is bigger than 87% of them (1.36 ac against a typical 0.57 ac) and it is newer than 73% of them (1983 against a typical 1970). 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 Olney St, Billerica, MA?

The 2025 property tax bill for 21 Olney St, Billerica, MA was $9,033. The county assessed it at $794,500.

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