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Governmental / Public Use (General)Public Works

21A COMMONWEALTH AVE

CONCORD, MA 01742
0
Baths
3,857 ft²
Lot SizeThe size of the land the home sits on, from county records.

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$378,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$378,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$378,700

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.129 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 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.Governmental / Public Use (General)
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.0.09
HeatingThe type of heating system in the home.None
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
Thoreau Elementary SchoolB+
Elementary · Grades KG–5 · 0.6 mi
M
Concord Middle SchoolB+
Middle · Grades 6–8 · 1.4 mi
H
Concord Carlisle High SchoolA+
High · Grades 9–12 · 2.7 mi

District: Concord School District

Neighborhood · ZIP 01742These 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.47
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.18,974
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.737 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$185,796
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$221,000
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

21a Commonwealth Ave 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 smallest lots in Concord 01742

How it measures up in Concord 01742

The dot is this home. The mark in the middle is the typical home in Concord 01742.

Lot size3,857 ft²
SmallerTypical 0.67 acBigger

Smaller than almost all homes nearby

How 21a Commonwealth Ave ranks against every home in each area.
MeasureThis homeConcord 01742Middlesex County
Lot sizebigger than3,857 ft²almost no homes8% of homes

More homes on 21a Commonwealth Ave

Closest homes

More homes in Concord 01742

Assigned schools

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