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CondominiumResidential
Last sold for $355,000 on Mar 3, 2023

15 ALTON ST

LOWELL, MA 01852
0.85 ac
Lot SizeThe size of the land the home sits on, from county records.
2005
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
Built 200515 units1,132–1,276 ft²
$6.4M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$425K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$353
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-1.7%vs the Lowell ZIP median sale $/ft² ($359)

Sales Performance

$410K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
4
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
26.7%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.0%per yeartypical hold 6.7 yrsfrom 25 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20052008201220142017201920232026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20052008201220142017201920232026

40 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$396K$417K$438K$459K1,132 ft²1,161 ft²1,190 ft²1,218 ft²1,247 ft²1,276 ft²
2 bd
2 bed
15 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1.5 ba · 1,132 ft²
2 units
2 bd · 1.5 ba · 1,155 ft²
2 units
2 bd · 1.5 ba · 1,166 ft²
2 units
2 bd · 1.5 ba · 1,256 ft²
2 units
One-off layouts
7 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$396K–$403K
2 units
$404K–$411K
4 units
$423K–$425K
2 units
$430K–$433K
2 units
$436K–$438K
2 units
$446K–$448K
2 units
$459K–$459K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.93%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.7%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.8.3 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.0%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.45%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$414,100
Median tax billThe middle annual property tax bill among the building's units.$4,271
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.1

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 9May 15, 2026$430,000Unit 10Nov 25, 2025$415,000Unit 6Oct 17, 2025$405,000Unit 16Oct 3, 2025$390,000Unit 12Oct 12, 2023$400,000Unit 9Aug 11, 2023$392,000BuildingMar 3, 2023$355,000Unit 2Jul 16, 2021$306,000Unit 9Apr 7, 2021$325,500Unit 9Mar 27, 2020$199,900

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,252 (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.$370,400 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$370,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$390,830

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMIDDLESEX
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
CoolingThe type of cooling or air conditioning in the home.Yes
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(3)

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
Moody Elementary SchoolB
Elementary · Grades PK–4 · 0.2 mi
H
Leblanc Therapeutic Day School
High · Grades 9–12 · 0.7 mi
M
B.F. Butler Middle SchoolC
Middle · Grades 5–8 · 0.7 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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

15 Alton St
2 bd · 1.5 ba · 1,157 ft²
$409K
15 Alton St
2 bd · 1.5 ba · 1,245 ft²
$446K
15 Alton St # 2
2 bd · 1.5 ba · 1,132 ft²
$423K
15 Alton St # 3
2 bd · 1.5 ba · 1,256 ft²
$430K
15 Alton St # 4
2 bd · 1.5 ba · 1,132 ft²
$396K
15 Alton St
2 bd · 1.5 ba · 1,276 ft²
$448K
15 Alton St # 6
2 bd · 1.5 ba · 1,256 ft²
$425K
15 Alton St # 7
2 bd · 1.5 ba · 1,167 ft²
$409K
15 Alton St # 8
2 bd · 1.5 ba · 1,255 ft²
$459K
15 Alton St # 9
2 bd · 1.5 ba · 1,156 ft²
$436K
15 Alton St # 10
2 bd · 1.5 ba · 1,155 ft²
$433K
15 Alton St # 11
2 bd · 1.5 ba · 1,157 ft²
$403K
15 Alton St # 12
2 bd · 1.5 ba · 1,153 ft²
$438K
15 Alton St # 13
2 bd · 1.5 ba · 1,166 ft²
$404K
15 Alton St # 14
2 bd · 1.5 ba · 1,166 ft²
$411K
15 Alton St # 16
2 bd · 1.5 ba · 1,155 ft²
$409K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 15 Alton St

How many units are in 15 Alton St, Lowell, MA?

15 Alton St, Lowell, MA has 15 residential units across built in 2005, according to county assessor records.

What is a unit at 15 Alton St, Lowell, MA worth?

The median TopHap Estimate across the 15 units at 15 Alton St, Lowell, MA is $424,513. That works out to $353 per square foot. Units run from 1,132 to 1,276 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 15 Alton St, Lowell, MA expensive for Lowell?

Units at 15 Alton St, Lowell, MA carry a median of $353 per square foot, 2% below the Lowell median of $359 per square foot.

How often do units sell at 15 Alton St, Lowell, MA?

4 units at 15 Alton St, Lowell, MA sold in the last 12 months, out of 40 recorded arms-length sales all time. That is a turnover rate of 26.7% of the building per year. The median sale over that period was $410K.

Have units at 15 Alton St, Lowell, MA appreciated?

Across 25 repeat sales of the same unit, 15 Alton St, Lowell, MA returned a median 3.0% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 6.7 years.

What floor plans does 15 Alton St, Lowell, MA have?

The most common plan at 15 Alton St, Lowell, MA is a 2-bedroom of 1,132 square feet, repeated 2 times, with a median estimate of $409,415. TopHap identifies 4 recurring plans in the building.

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Assigned schools

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