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Single Family ResidenceResidential
$645,368$384 / 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 90How 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

12 B ST

CHELMSFORD, MA 01824
3
Beds
2
Baths
1,680 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.
0.46 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$645K
$579K low$712K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,172 (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.$587,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$283,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$304,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$601,920

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.44 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.46
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Center Elementary SchoolA-
Elementary · Grades KG–4 · 1.0 mi
M
McCarthy Middle SchoolB
Middle · Grades 7–8 · 2.0 mi
H
Chelmsford High SchoolA
High · Grades 9–12 · 2.5 mi

District: Chelmsford School District

Neighborhood · ZIP 01824These 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.68
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.81

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.5.9%
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.27,961
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,525 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,207
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$151,835
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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

12 B 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 less than 68% of homes in Middlesex County
  • Costs less per square foot than 72% of homes in Middlesex County
  • Has a smaller lot than 79% of homes in Chelmsford 01824
  • Newer than 68% of homes in Chelmsford 01824

What homes are worth in Chelmsford 01824

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

This home
$322K$1.2M

This home is worth more than 38% of homes in Chelmsford 01824.

How it measures up in Chelmsford 01824

The dot is this home. The mark in the middle is the typical home in Chelmsford 01824.

Estimated value$645,368
CheaperTypical $689,747Pricier

Pricier than 38% of homes nearby

Price per ft²$384
CheaperTypical $400Pricier

Pricier than 41% of homes nearby

Living area1,680 ft²
SmallerTypical 1,661 ft²Bigger

Bigger than 51% of homes nearby

Lot size0.46 ac
SmallerTypical 0.78 acBigger

Bigger than 21% of homes nearby

Year built1973
OlderTypical 1965Newer

Newer than 68% of homes nearby

How 12 B St ranks against every home in each area.
MeasureThis homeChelmsford 01824Middlesex County
Estimated valuepricier than$645,36838% of homes32% of homes
Price per ft²pricier than$38441% of homes28% of homes
Living areabigger than1,680 ft²51% of homes43% of homes
Lot sizebigger than0.46 ac21% of homes62% of homes
Year builtnewer than197368% of homes67% of homes

About 12 B St

How much is 12 B St, Chelmsford, MA worth?

The TopHap Estimate for 12 B St, Chelmsford, MA is $645,368 as of Sep 24, 2026. The likely range is $578,656 to $712,080. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12 B St, Chelmsford, MA last sell?

12 B St, Chelmsford, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12 B St, Chelmsford, MA?

12 B St, Chelmsford, MA has 3 bedrooms, 2 bathrooms, 1,680 square feet of living space and a 0.46-acre lot.

When was 12 B St, Chelmsford, MA built?

12 B St, Chelmsford, MA was built in 1973, making it 53 years old. It is a cape cod home. The building has 2 stories.

What schools serve 12 B St, Chelmsford, MA?

12 B St, Chelmsford, MA is assigned to Center Elementary School (elementary), rated A-; McCarthy Middle School (middle), rated B; Chelmsford High School (high), rated A. All sit in Chelmsford School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12 B St, Chelmsford, MA compare to other homes in Chelmsford 01824?

Among the 8,861 homes in Chelmsford 01824, it is worth more than 38% of them ($645,368 against a typical $689,747), its price per square foot is higher than 41% of them ($384 against a typical $400), it is bigger than 51% of them (1,680 ft² against a typical 1,661 ft²), its lot is bigger than 21% of them (0.46 ac against a typical 0.78 ac) and it is newer than 68% of them (1973 against a typical 1965). Measured against all of Middlesex County, it is worth more than 32% 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 12 B St, Chelmsford, MA?

The 2025 property tax bill for 12 B St, Chelmsford, MA was $8,172. The county assessed it at $587,900.

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