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Single Family ResidenceResidential
$538,547$263 / 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

673 CHELMSFORD ST

LOWELL, MA 01851
4
Beds
1
Baths
2,047 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
2
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

$539K
$500K low$578K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,722 (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.$504,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$195,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$308,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$468,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$495,448

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.Conventional
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.12
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Steam
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
WashingtonC-
Elementary · Grades PK–4 · 0.3 mi
M
Laura Lee Therapeutic Day SchoolF
Middle · Grades 5–8 · 0.3 mi
H
Lowell High SchoolD
High · Grades 9–12 · 1.9 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

673 Chelmsford 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 81% of homes in Middlesex County
  • Costs less per square foot than 96% of homes in Middlesex County
  • Has a smaller lot than 83% of homes in Middlesex County
  • Older than 95% of homes in Highlands

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
$212K$745K

This home is worth more than 72% 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$538,547
CheaperTypical $464,443Pricier

Pricier than 72% of homes nearby

Price per ft²$263
CheaperTypical $300Pricier

Pricier than 32% of homes nearby

Living area2,047 ft²
SmallerTypical 1,755 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.12 ac
SmallerTypical 0.14 acBigger

Bigger than 34% of homes nearby

Year built1890
OlderTypical 1920Newer

Newer than 7% of homes nearby

How 673 Chelmsford St ranks against every home in each area.
MeasureThis homeHighlandsLowell 01851Middlesex County
Estimated valuepricier than$538,54761% of homes72% of homes19% of homes
Price per ft²pricier than$26321% of homes32% of homes4% of homes
Living areabigger than2,047 ft²64% of homes62% of homes58% of homes
Lot sizebigger than0.12 ac25% of homes34% of homes17% of homes
Year builtnewer than18905% of homes7% of homes7% of homes

About 673 Chelmsford St

How much is 673 Chelmsford St, Lowell, MA worth?

The TopHap Estimate for 673 Chelmsford St, Lowell, MA is $538,547 as of Sep 24, 2026. The likely range is $499,589 to $577,505. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 673 Chelmsford St, Lowell, MA last sell?

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

How big is 673 Chelmsford St, Lowell, MA?

673 Chelmsford St, Lowell, MA has 4 bedrooms, 1 bathrooms, 2,047 square feet of living space and a 0.12-acre lot.

When was 673 Chelmsford St, Lowell, MA built?

673 Chelmsford St, Lowell, MA was built in 1890, making it 136 years old. It is a conventional home. The building has 2 stories.

What schools serve 673 Chelmsford St, Lowell, MA?

673 Chelmsford St, Lowell, MA is assigned to Washington (elementary), rated C-; Laura Lee Therapeutic Day School (middle), rated F; 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 673 Chelmsford St, Lowell, MA compare to other homes in Lowell 01851?

Among the 5,774 homes in Lowell 01851, it is worth more than 72% of them ($538,547 against a typical $464,443), its price per square foot is higher than 32% of them ($263 against a typical $300), it is bigger than 62% of them (2,047 ft² against a typical 1,755 ft²), its lot is bigger than 34% of them (0.12 ac against a typical 0.14 ac) and it is newer than 7% of them (1890 against a typical 1920). Measured against all of Middlesex County, it is worth more than 19% 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 673 Chelmsford St, Lowell, MA?

The 2026 property tax bill for 673 Chelmsford St, Lowell, MA was $5,722. The county assessed it at $504,100.

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