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Single Family ResidenceResidential
$440,328$510 / 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 Aug 30, 2026
Last sold for $380,000 on Sep 24, 2021

20 RIVER ST

WESTFORD, MA 01886
3
Beds
1
Baths
864 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
1
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

$440K
$410K low$471K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$380,000 · Sep 24, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,373 (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.$398,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$280,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$118,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$428,165

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.0.19
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(9)

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
Lloyd G. Blanchard Middle SchoolA-
Middle · Grades 6–8 · 1.0 mi
H
Westford AcademyA
High · Grades 9–12 · 1.2 mi
E
Rita E. Miller Elementary School
Elementary · Grades PK–2 · 3.6 mi

District: Westford School District

Neighborhood · ZIP 01886These 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.19
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 100.80

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.25,048
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.803 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$163,754
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$183,117
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.46 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

20 River 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 95% of homes in Westford 01886
  • Costs more per square foot than 86% of homes in Westford 01886
  • Smaller than 95% of homes in Westford 01886
  • Has a smaller lot than 96% of homes in Westford 01886
  • Older than 95% of homes in Westford 01886

What homes are worth in Westford 01886

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

This home
$322K$1.6M

This home is worth more than 5% of homes in Westford 01886.

How it measures up in Westford 01886

The dot is this home. The mark in the middle is the typical home in Westford 01886.

Estimated value$440,328
CheaperTypical $828,036Pricier

Pricier than 5% of homes nearby

Price per ft²$510
CheaperTypical $418Pricier

Pricier than 86% of homes nearby

Living area864 ft²
SmallerTypical 2,060 ft²Bigger

Bigger than 5% of homes nearby

Lot size0.19 ac
SmallerTypical 0.92 acBigger

Bigger than 4% of homes nearby

Year built1900
OlderTypical 1984Newer

Newer than 5% of homes nearby

How 20 River St ranks against every home in each area.
MeasureThis homeWestford 01886Middlesex County
Estimated valuepricier than$440,3285% of homes10% of homes
Price per ft²pricier than$51086% of homes61% of homes
Living areabigger than864 ft²5% of homes7% of homes
Lot sizebigger than0.19 ac4% of homes34% of homes
Year builtnewer than19005% of homes15% of homes

About 20 River St

How much is 20 River St, Westford, MA worth?

The TopHap Estimate for 20 River St, Westford, MA is $440,328 as of Aug 30, 2026. The likely range is $410,060 to $470,596. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 River St, Westford, MA last sell?

20 River St, Westford, MA last sold on Sep 24, 2021 for $380,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 20 River St, Westford, MA?

20 River St, Westford, MA has 3 bedrooms, 1 bathrooms, 864 square feet of living space and a 0.19-acre lot.

When was 20 River St, Westford, MA built?

20 River St, Westford, MA was built in 1900, making it 126 years old. It is a bungalow home. The building has 1 story.

What schools serve 20 River St, Westford, MA?

20 River St, Westford, MA is assigned to Lloyd G. Blanchard Middle School (middle), rated A-; Westford Academy (high), rated A; Rita E. Miller Elementary School (elementary). All sit in Westford School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 River St, Westford, MA compare to other homes in Westford 01886?

Among the 8,171 homes in Westford 01886, it is worth more than 5% of them ($440,328 against a typical $828,036), its price per square foot is higher than 86% of them ($510 against a typical $418), it is bigger than 5% of them (864 ft² against a typical 2,060 ft²), its lot is bigger than 4% of them (0.19 ac against a typical 0.92 ac) and it is newer than 5% of them (1900 against a typical 1984). 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 20 River St, Westford, MA?

The 2025 property tax bill for 20 River St, Westford, MA was $5,373. The county assessed it at $398,900.

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