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Single Family ResidenceResidential
$443,689$272 / 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 94How 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

21 LONDON ST

LOWELL, MA 01852
4
Beds
2
Baths
1,630 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.
3,485 ft²
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$444K
$418K low$469K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,333 (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.$377,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$131,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$246,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$440,800

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.Bungalow
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.08
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(6)

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.

M
B.F. Butler Middle SchoolC
Middle · Grades 5–8 · 0.2 mi
E
John J ShaughnessyC
Elementary · Grades PK–4 · 0.3 mi
H
Leblanc Therapeutic Day School
High · Grades 9–12 · 1.3 mi

District: Lowell School District

Neighborhood · ZIP 01852These 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.129
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.98
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.87

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.16%
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.38,007
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,196 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$68,803
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$89,531
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

21 London 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 90% of homes in Middlesex County
  • Costs less per square foot than 95% of homes in Middlesex County
  • Has a smaller lot than 93% of homes in Middlesex County
  • Older than 75% of homes in Middlesex County

What homes are worth in Lowell 01852

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

This home
$209K$877K

This home is worth more than 52% of homes in Lowell 01852.

How it measures up in Lowell 01852

The dot is this home. The mark in the middle is the typical home in Lowell 01852.

Estimated value$443,689
CheaperTypical $439,204Pricier

Pricier than 52% of homes nearby

Price per ft²$272
CheaperTypical $306Pricier

Pricier than 32% of homes nearby

Living area1,630 ft²
SmallerTypical 1,538 ft²Bigger

Bigger than 54% of homes nearby

Lot size3,485 ft²
SmallerTypical 0.19 acBigger

Bigger than 16% of homes nearby

Year built1920
OlderTypical 1950Newer

Newer than 41% of homes nearby

How 21 London St ranks against every home in each area.
MeasureThis homeSacred HeartLowell 01852Middlesex County
Estimated valuepricier than$443,68954% of homes52% of homes10% of homes
Price per ft²pricier than$27219% of homes32% of homes5% of homes
Living areabigger than1,630 ft²60% of homes54% of homes41% of homes
Lot sizebigger than3,485 ft²24% of homes16% of homes7% of homes
Year builtnewer than192051% of homes41% of homes25% of homes

About 21 London St

How much is 21 London St, Lowell, MA worth?

The TopHap Estimate for 21 London St, Lowell, MA is $443,689 as of Sep 24, 2026. The likely range is $418,045 to $469,333. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 London St, Lowell, MA last sell?

21 London St, Lowell, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 London St, Lowell, MA?

21 London St, Lowell, MA has 4 bedrooms, 2 bathrooms, 1,630 square feet of living space and a 0.08-acre lot.

When was 21 London St, Lowell, MA built?

21 London St, Lowell, MA was built in 1920, making it 106 years old. It is a bungalow home. The building has 1 story.

What schools serve 21 London St, Lowell, MA?

21 London St, Lowell, MA is assigned to B.F. Butler Middle School (middle), rated C; John J Shaughnessy (elementary), rated C; Leblanc Therapeutic Day School (high). All sit in Lowell School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 London St, Lowell, MA compare to other homes in Lowell 01852?

Among the 8,439 homes in Lowell 01852, it is worth more than 52% of them ($443,689 against a typical $439,204), its price per square foot is higher than 32% of them ($272 against a typical $306), it is bigger than 54% of them (1,630 ft² against a typical 1,538 ft²), its lot is bigger than 16% of them (3,485 ft² against a typical 0.19 ac) and it is newer than 41% of them (1920 against a typical 1950). Measured against all of Middlesex County, it is worth more than 10% 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 21 London St, Lowell, MA?

The 2025 property tax bill for 21 London St, Lowell, MA was $4,333. The county assessed it at $377,400.

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