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Single Family ResidenceResidential
$1,052,071$302 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $540,000 on Aug 15, 2003

18 KIRSI CIR

WESTFORD, MA 01886
5
Beds
3.5
Baths
3,487 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.
1.05 ac
Lot SizeThe size of the land the home sits on, from county records.
1969
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.1M
$1M low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$540,000 · Aug 15, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,162 (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.$1,004,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$358,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$645,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$926,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,087,370

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
20
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
59
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
94
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
25
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.Cape Cod
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.1.05
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.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

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
Nabnasset Elementary School
Elementary · Grades PK–2 · 1.2 mi
M
Stony Brook Middle SchoolA
Middle · Grades 6–8 · 2.1 mi
H
Westford AcademyA+
High · Grades 9–12 · 2.3 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

18 Kirsi Cir 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 more than 79% of homes in Westford 01886
  • Costs less per square foot than 95% of homes in Westford 01886
  • Bigger than 94% of homes in Westford 01886
  • Has a bigger lot than 80% of homes in Middlesex County
  • Older than 70% 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
$309K$1.5M

This home is worth more than 79% 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$1,052,071
CheaperTypical $808,196Pricier

Pricier than 79% of homes nearby

Price per ft²$302
CheaperTypical $408Pricier

Pricier than 5% of homes nearby

Living area3,487 ft²
SmallerTypical 2,074 ft²Bigger

Bigger than 94% of homes nearby

Lot size1.05 ac
SmallerTypical 0.92 acBigger

Bigger than 64% of homes nearby

Year built1969
OlderTypical 1984Newer

Newer than 30% of homes nearby

How 18 Kirsi Cir ranks against every home in each area.
MeasureThis homeWestford 01886Middlesex County
Estimated valuepricier than$1,052,07179% of homes73% of homes
Price per ft²pricier than$3025% of homes9% of homes
Living areabigger than3,487 ft²94% of homes91% of homes
Lot sizebigger than1.05 ac64% of homes80% of homes
Year builtnewer than196930% of homes62% of homes

About 18 Kirsi Cir

How much is 18 Kirsi Cir, Westford, MA worth?

The TopHap Estimate for 18 Kirsi Cir, Westford, MA is $1,052,071 as of Oct 21, 2026. The likely range is $1,011,914 to $1,092,228. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Kirsi Cir, Westford, MA last sell?

18 Kirsi Cir, Westford, MA last sold on Aug 15, 2003 for $540,000, according to the county's recorded deed.

How big is 18 Kirsi Cir, Westford, MA?

18 Kirsi Cir, Westford, MA has 5 bedrooms, 3.5 bathrooms, 3,487 square feet of living space and a 1.05-acre lot.

When was 18 Kirsi Cir, Westford, MA built?

18 Kirsi Cir, Westford, MA was built in 1969, making it 57 years old. It is a cape cod home. The building has 2 stories.

What schools serve 18 Kirsi Cir, Westford, MA?

18 Kirsi Cir, Westford, MA is assigned to Nabnasset Elementary School (elementary); Stony Brook Middle School (middle), rated A; Westford Academy (high), rated A+. All sit in Westford School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Kirsi Cir, Westford, MA compare to other homes in Westford 01886?

Among the 8,171 homes in Westford 01886, it is worth more than 79% of them ($1,052,071 against a typical $808,196), its price per square foot is higher than 5% of them ($302 against a typical $408), it is bigger than 94% of them (3,487 ft² against a typical 2,074 ft²), its lot is bigger than 64% of them (1.05 ac against a typical 0.92 ac) and it is newer than 30% of them (1969 against a typical 1984). Measured against all of Middlesex County, it is worth more than 73% 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 18 Kirsi Cir, Westford, MA?

The 2026 property tax bill for 18 Kirsi Cir, Westford, MA was $13,162. The county assessed it at $1,004,000.

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