Skip to content
Skip to content
TopHapOpen in map
Duplex (2 Units, Any Combination)Residential
Last sold for $1,231,000 on Sep 24, 2021

18 MARY ST

ARLINGTON, MA 02474
4
Beds
2
Baths
2,535 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1926
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
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.$1,231,000 · Sep 24, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,742 (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.$1,183,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$586,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$597,100

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.24 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.0.2 percent flood zone

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.Duplex Single
CountyMIDDLESEX
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.1959
Lot (acres)The size of the land the home sits on, from county records.0.11
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.Steam
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(9)

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
R.J. Hardy Elementary SchoolB
Elementary · Grades KG–5 · 0.1 mi
H
Arlington High SchoolA+
High · Grades 9–12 · 1.2 mi
M
Ottoson Middle SchoolA
Middle · Grades 7–8 · 1.9 mi

District: Arlington School District

Neighborhood · ZIP 02474These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.79

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.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.28,960
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,757 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$135,066
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$157,393
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%

Owner Tools

Do you own this home?
Claim this home

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

18 Mary 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 75% of homes in Arlington 02474
  • Has a smaller lot than 86% of homes in Middlesex County
  • Older than 71% of homes in Middlesex County

How it measures up in Arlington 02474

The dot is this home. The mark in the middle is the typical home in Arlington 02474.

Living area2,535 ft²
SmallerTypical 1,975 ft²Bigger

Bigger than 75% of homes nearby

Lot size0.11 ac
SmallerTypical 0.14 acBigger

Bigger than 18% of homes nearby

Year built1926
OlderTypical 1932Newer

Newer than 39% of homes nearby

How 18 Mary St ranks against every home in each area.
MeasureThis homeArlington 02474Middlesex County
Living areabigger than2,535 ft²75% of homes75% of homes
Lot sizebigger than0.11 ac18% of homes14% of homes
Year builtnewer than192639% of homes29% of homes

About 18 Mary St

When did 18 Mary St, Arlington, MA last sell?

18 Mary St, Arlington, MA last sold on Sep 24, 2021 for $1,231,000, according to the county's recorded deed.

How big is 18 Mary St, Arlington, MA?

18 Mary St, Arlington, MA has 4 bedrooms, 2 bathrooms, 2,535 square feet of living space and a 0.11-acre lot.

When was 18 Mary St, Arlington, MA built?

18 Mary St, Arlington, MA was built in 1926, making it 100 years old. It is a duplex single home. The building has 2 stories.

What schools serve 18 Mary St, Arlington, MA?

18 Mary St, Arlington, MA is assigned to R.J. Hardy Elementary School (elementary), rated B; Arlington High School (high), rated A+; Ottoson Middle School (middle), rated A. All sit in Arlington School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Mary St, Arlington, MA compare to other homes in Arlington 02474?

Among the 8,570 homes in Arlington 02474, it is bigger than 75% of them (2,535 ft² against a typical 1,975 ft²), its lot is bigger than 18% of them (0.11 ac against a typical 0.14 ac) and it is newer than 39% of them (1926 against a typical 1932). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 18 Mary St, Arlington, MA?

The 2025 property tax bill for 18 Mary St, Arlington, MA was $12,742. The county assessed it at $1,183,100.

More homes on Mary St

Closest homes

More homes in Arlington 02474

Assigned schools

Explore the area

See this home in context

Open 18 Mary St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map