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Single Family ResidenceResidential
$559,028$459 / 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 93How 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 $307,000 on Jul 28, 2017

121 MARIPOSA AVE

LOWELL, MA 01851
3
Beds
1
Baths
1,218 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$559K
$522K low$596K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$307,000 · Jul 28, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,642 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$497,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$203,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$293,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$478,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$574,938

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.Ranch
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.17
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
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
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(4)

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
James S Daley Middle SchoolC+
Middle · Grades 5–8 · 0.5 mi
E
Dr Gertrude BaileyC+
Elementary · Grades PK–4 · 0.7 mi
H
Lowell High SchoolD
High · Grades 9–12 · 2.2 mi

District: Lowell School District

Neighborhood · ZIP 01851These 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.111
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.85

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
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.33,136
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.9,695 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$80,238
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$107,324
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

121 Mariposa 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.

  • Worth less than 79% of homes in Middlesex County
  • Costs more per square foot than 96% of homes in Lowell 01851
  • Smaller than 85% of homes in Highlands
  • Has a smaller lot than 71% of homes in Middlesex County
  • Newer than 76% of homes in Lowell 01851

What homes are worth in Lowell 01851

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

This home
$213K$745K

This home is worth more than 77% of homes in Lowell 01851.

How it measures up in Lowell 01851

The dot is this home. The mark in the middle is the typical home in Lowell 01851.

Estimated value$559,028
CheaperTypical $466,124Pricier

Pricier than 77% of homes nearby

Price per ft²$459
CheaperTypical $300Pricier

Pricier than 96% of homes nearby

Living area1,218 ft²
SmallerTypical 1,753 ft²Bigger

Bigger than 17% of homes nearby

Lot size0.17 ac
SmallerTypical 0.14 acBigger

Bigger than 58% of homes nearby

Year built1960
OlderTypical 1920Newer

Newer than 76% of homes nearby

How 121 Mariposa Ave ranks against every home in each area.
MeasureThis homeHighlandsLowell 01851Middlesex County
Estimated valuepricier than$559,02868% of homes77% of homes21% of homes
Price per ft²pricier than$45995% of homes96% of homes50% of homes
Living areabigger than1,218 ft²15% of homes17% of homes21% of homes
Lot sizebigger than0.17 ac48% of homes58% of homes29% of homes
Year builtnewer than196075% of homes76% of homes54% of homes

About 121 Mariposa Ave

How much is 121 Mariposa Ave, Lowell, MA worth?

The TopHap Estimate for 121 Mariposa Ave, Lowell, MA is $559,028 as of Sep 24, 2026. The likely range is $522,205 to $595,851. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 Mariposa Ave, Lowell, MA last sell?

121 Mariposa Ave, Lowell, MA last sold on Jul 28, 2017 for $307,000, according to the county's recorded deed.

How big is 121 Mariposa Ave, Lowell, MA?

121 Mariposa Ave, Lowell, MA has 3 bedrooms, 1 bathrooms, 1,218 square feet of living space and a 0.17-acre lot.

When was 121 Mariposa Ave, Lowell, MA built?

121 Mariposa Ave, Lowell, MA was built in 1960, making it 66 years old. It is a ranch home. The building has 1 story.

What schools serve 121 Mariposa Ave, Lowell, MA?

121 Mariposa Ave, Lowell, MA is assigned to James S Daley Middle School (middle), rated C+; Dr Gertrude Bailey (elementary), rated C+; Lowell High School (high), rated D. All sit in Lowell School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 Mariposa Ave, Lowell, MA compare to other homes in Lowell 01851?

Among the 5,774 homes in Lowell 01851, it is worth more than 77% of them ($559,028 against a typical $466,124), its price per square foot is higher than 96% of them ($459 against a typical $300), it is bigger than 17% of them (1,218 ft² against a typical 1,753 ft²), its lot is bigger than 58% of them (0.17 ac against a typical 0.14 ac) and it is newer than 76% of them (1960 against a typical 1920). Measured against all of Middlesex County, it is worth more than 21% 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 121 Mariposa Ave, Lowell, MA?

The 2026 property tax bill for 121 Mariposa Ave, Lowell, MA was $5,642. The county assessed it at $497,100.

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