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Single Family ResidenceResidential
$279,631$265 / 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 Sep 24, 2026
Last sold for $5,125 on Nov 20, 2002

427 S CASS AVE

WESTMONT, IL 60559
1
Baths
1,056 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
1924
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$280K
$270K low$290K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$5,125 · Nov 20, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,306 (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.$76,657 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$35,975
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,682
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$71,044
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$229,971

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyDUPAGE
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Westview Hills Middle SchoolB+
Middle · Grades 6–8 · 1.1 mi
E
Holmes Elementary School
Elementary · Grades PK–2 · 1.2 mi
H
Hinsdale Central High SchoolA
High · Grades 9–12 · 2.2 mi

District: Maercker School District 60

Neighborhood · ZIP 60559These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.118
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.1%
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.23,724
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,552 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,823
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$126,007
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.38 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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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

427 S Cass 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 88% of homes in DuPage County
  • Smaller than 88% of homes in DuPage County
  • Has a smaller lot than 85% of homes in DuPage County
  • Older than 97% of homes in DuPage County

What homes are worth in Westmont 60559

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

This home
$198K$1.1M

This home is worth more than 13% of homes in Westmont 60559.

How it measures up in Westmont 60559

The dot is this home. The mark in the middle is the typical home in Westmont 60559.

Estimated value$279,631
CheaperTypical $421,884Pricier

Pricier than 13% of homes nearby

Price per ft²$265
CheaperTypical $281Pricier

Pricier than 37% of homes nearby

Living area1,056 ft²
SmallerTypical 1,466 ft²Bigger

Bigger than 18% of homes nearby

Lot size0.15 ac
SmallerTypical 0.21 acBigger

Bigger than 19% of homes nearby

Year built1924
OlderTypical 1977Newer

Newer than 5% of homes nearby

How 427 S Cass Ave ranks against every home in each area.
MeasureThis homeWestmont 60559DuPage County
Estimated valuepricier than$279,63113% of homes12% of homes
Price per ft²pricier than$26537% of homes62% of homes
Living areabigger than1,056 ft²18% of homes12% of homes
Lot sizebigger than0.15 ac19% of homes15% of homes
Year builtnewer than19245% of homes3% of homes

About 427 S Cass Ave

How much is 427 S Cass Ave, Westmont, IL worth?

The TopHap Estimate for 427 S Cass Ave, Westmont, IL is $279,631 as of Sep 24, 2026. The likely range is $269,693 to $289,569. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 427 S Cass Ave, Westmont, IL last sell?

427 S Cass Ave, Westmont, IL last sold on Nov 20, 2002 for $5,125, according to the county's recorded deed.

How big is 427 S Cass Ave, Westmont, IL?

427 S Cass Ave, Westmont, IL has 1 bathrooms, 1,056 square feet of living space and a 0.15-acre lot.

When was 427 S Cass Ave, Westmont, IL built?

427 S Cass Ave, Westmont, IL was built in 1924, making it 102 years old. The building has 1 story.

What schools serve 427 S Cass Ave, Westmont, IL?

427 S Cass Ave, Westmont, IL is assigned to Westview Hills Middle School (middle), rated B+; Holmes Elementary School (elementary); Hinsdale Central High School (high), rated A. All sit in Maercker School District 60. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 427 S Cass Ave, Westmont, IL compare to other homes in Westmont 60559?

Among the 6,971 homes in Westmont 60559, it is worth more than 13% of them ($279,631 against a typical $421,884), its price per square foot is higher than 37% of them ($265 against a typical $281), it is bigger than 18% of them (1,056 ft² against a typical 1,466 ft²), its lot is bigger than 19% of them (0.15 ac against a typical 0.21 ac) and it is newer than 5% of them (1924 against a typical 1977). Measured against all of DuPage County, it is worth more than 12% 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 427 S Cass Ave, Westmont, IL?

The 2025 property tax bill for 427 S Cass Ave, Westmont, IL was $4,306. The county assessed it at $76,657.

More homes on S Cass Ave

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