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Single Family ResidenceResidential
$1,742,946$594 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $480,000 on Jul 26, 1999

345 THOREAU ST

CONCORD, MA 01742
4
Beds
3 / 1
Baths
2,933 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.
0.41 ac
Lot SizeThe size of the land the home sits on, from county records.
1906
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.7M
$1.7M low$1.8M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$480,000 · Jul 26, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$26,643 (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.$2,009,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$914,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,095,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,747,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
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.0.41
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Steam
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(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
Alcott Elementary SchoolA+
Elementary · Grades KG–5 · 0.2 mi
H
Concord Carlisle High SchoolA+
High · Grades 9–12 · 0.4 mi
M
Concord Middle SchoolA+
Middle · Grades 6–8 · 2.5 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

345 Thoreau 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.

  • Worth more than 92% of homes in Middlesex County
  • Costs more per square foot than 76% of homes in Middlesex County
  • Bigger than 84% of homes in Middlesex County
  • Has a smaller lot than 74% of homes in Concord 01742
  • Older than 87% of homes in Concord 01742

What homes are worth in Concord 01742

Each bar is how many homes fall in that price range. The marker is this home.

This home
$549K$4.3M

This home is worth more than 67% 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.

Estimated value$1,742,946
CheaperTypical $1,437,472Pricier

Pricier than 67% of homes nearby

Price per ft²$594
CheaperTypical $598Pricier

Pricier than 49% of homes nearby

Living area2,933 ft²
SmallerTypical 2,387 ft²Bigger

Bigger than 65% of homes nearby

Lot size0.41 ac
SmallerTypical 0.62 acBigger

Bigger than 26% of homes nearby

Year built1906
OlderTypical 1967Newer

Newer than 13% of homes nearby

How 345 Thoreau St ranks against every home in each area.
MeasureThis homeConcord 01742Middlesex County
Estimated valuepricier than$1,742,94667% of homes92% of homes
Price per ft²pricier than$59449% of homes76% of homes
Living areabigger than2,933 ft²65% of homes84% of homes
Lot sizebigger than0.41 ac26% of homes57% of homes
Year builtnewer than190613% of homes16% of homes

About 345 Thoreau St

How much is 345 Thoreau St, Concord, MA worth?

The TopHap Estimate for 345 Thoreau St, Concord, MA is $1,742,946 as of Sep 24, 2026. The likely range is $1,659,387 to $1,826,505. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 345 Thoreau St, Concord, MA last sell?

345 Thoreau St, Concord, MA last sold on Jul 26, 1999 for $480,000, according to the county's recorded deed.

How big is 345 Thoreau St, Concord, MA?

345 Thoreau St, Concord, MA has 4 bedrooms, 3 bathrooms, 2,933 square feet of living space and a 0.41-acre lot.

When was 345 Thoreau St, Concord, MA built?

345 Thoreau St, Concord, MA was built in 1906, making it 120 years old. The building has 3 stories.

What schools serve 345 Thoreau St, Concord, MA?

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

How does 345 Thoreau St, Concord, MA compare to other homes in Concord 01742?

Among the 5,735 homes in Concord 01742, it is worth more than 67% of them ($1,742,946 against a typical $1,437,472), its price per square foot is higher than 49% of them ($594 against a typical $598), it is bigger than 65% of them (2,933 ft² against a typical 2,387 ft²), its lot is bigger than 26% of them (0.41 ac against a typical 0.62 ac) and it is newer than 13% of them (1906 against a typical 1967). Measured against all of Middlesex County, it is worth more than 92% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 345 Thoreau St, Concord, MA?

The 2025 property tax bill for 345 Thoreau St, Concord, MA was $26,643. The county assessed it at $2,009,300.

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