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Duplex (2 Units, Any Combination)Residential
Last sold for $435,000 on Jul 2, 2021

40 UNION ST

CONCORD, MA 01742
6
Beds
2
Baths
3,292 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1912
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$435,000 · Jul 2, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,714 (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.$1,260,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$766,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$493,900

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.1960
Lot (acres)The size of the land the home sits on, from county records.0.39
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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
Alcott Elementary SchoolA
Elementary · Grades KG–5 · 1.5 mi
H
Concord Carlisle High SchoolA+
High · Grades 9–12 · 1.7 mi
M
Concord Middle SchoolB+
Middle · Grades 6–8 · 4.1 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

40 Union 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 89% of homes in Middlesex County
  • Has a smaller lot than 76% of homes in Concord 01742
  • Older than 85% of homes 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.

Living area3,292 ft²
SmallerTypical 2,386 ft²Bigger

Bigger than 74% of homes nearby

Lot size0.39 ac
SmallerTypical 0.67 acBigger

Bigger than 24% of homes nearby

Year built1912
OlderTypical 1966Newer

Newer than 15% of homes nearby

How 40 Union St ranks against every home in each area.
MeasureThis homeConcord 01742Middlesex County
Living areabigger than3,292 ft²74% of homes89% of homes
Lot sizebigger than0.39 ac24% of homes57% of homes
Year builtnewer than191215% of homes20% of homes

About 40 Union St

When did 40 Union St, Concord, MA last sell?

40 Union St, Concord, MA last sold on Jul 2, 2021 for $435,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 40 Union St, Concord, MA?

40 Union St, Concord, MA has 6 bedrooms, 2 bathrooms, 3,292 square feet of living space and a 0.39-acre lot.

When was 40 Union St, Concord, MA built?

40 Union St, Concord, MA was built in 1912, making it 114 years old. It is a duplex single home. The building has 2 stories.

What schools serve 40 Union St, Concord, MA?

40 Union St, Concord, MA is assigned to Alcott Elementary School (elementary), rated A; Concord Carlisle High School (high), rated A+; Concord Middle School (middle), rated B+. All sit in Concord School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 40 Union St, Concord, MA compare to other homes in Concord 01742?

Among the 5,735 homes in Concord 01742, it is bigger than 74% of them (3,292 ft² against a typical 2,386 ft²), its lot is bigger than 24% of them (0.39 ac against a typical 0.67 ac) and it is newer than 15% of them (1912 against a typical 1966). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 40 Union St, Concord, MA?

The 2025 property tax bill for 40 Union St, Concord, MA was $16,714. The county assessed it at $1,260,500.

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Assigned schools

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