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Single Family ResidenceResidential
$660,368$569 / 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 95How 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

642 S LOOMIS ST

NAPERVILLE, IL 60540
1.5
Baths
1,160 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$660K
$629K low$692K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,456 (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.$178,029 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$111,983
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$66,046
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$164,037
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$534,087

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.Ranch
CountyDUPAGE
Lot (acres)The size of the land the home sits on, from county records.0.21
HeatingThe type of heating system in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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.

E
Highlands Elementary SchoolA+
Elementary · Grades KG–5 · 0.2 mi
H
Naperville Central High SchoolA+
High · Grades 9–12 · 0.8 mi
M
Kennedy Junior High SchoolA+
Middle · Grades 6–8 · 1.7 mi

District: Naperville Community Unit District 203

Neighborhood · ZIP 60540These 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.74
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.51

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.45,217
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,223 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$143,923
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$182,929
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

642 S Loomis 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 more than 77% of homes in DuPage County
  • Among the highest price per square foot in Naperville 60540
  • Smaller than 96% of homes in Naperville 60540
  • Has a smaller lot than 72% of homes in Naperville 60540
  • Older than 93% of homes in Naperville 60540

What homes are worth in Naperville 60540

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

This home
$248K$2.1M

This home is worth more than 50% of homes in Naperville 60540.

How it measures up in Naperville 60540

The dot is this home. The mark in the middle is the typical home in Naperville 60540.

Estimated value$660,368
CheaperTypical $660,640Pricier

Pricier than 50% of homes nearby

Price per ft²$569
CheaperTypical $261Pricier

Pricier than almost all homes nearby

Living area1,160 ft²
SmallerTypical 2,460 ft²Bigger

Bigger than 4% of homes nearby

Lot size0.21 ac
SmallerTypical 0.25 acBigger

Bigger than 28% of homes nearby

Year built1956
OlderTypical 1983Newer

Newer than 7% of homes nearby

How 642 S Loomis St ranks against every home in each area.
MeasureThis homeNaperville 60540DuPage County
Estimated valuepricier than$660,36850% of homes77% of homes
Price per ft²pricier than$569almost all homesalmost all homes
Living areabigger than1,160 ft²4% of homes17% of homes
Lot sizebigger than0.21 ac28% of homes40% of homes
Year builtnewer than19567% of homes16% of homes

About 642 S Loomis St

How much is 642 S Loomis St, Naperville, IL worth?

The TopHap Estimate for 642 S Loomis St, Naperville, IL is $660,368 as of Oct 21, 2026. The likely range is $628,626 to $692,110. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 642 S Loomis St, Naperville, IL last sell?

642 S Loomis St, Naperville, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 642 S Loomis St, Naperville, IL?

642 S Loomis St, Naperville, IL has 1.5 bathrooms, 1,160 square feet of living space and a 0.21-acre lot.

When was 642 S Loomis St, Naperville, IL built?

642 S Loomis St, Naperville, IL was built in 1956, making it 70 years old. It is a ranch home. The building has 1 story.

What schools serve 642 S Loomis St, Naperville, IL?

642 S Loomis St, Naperville, IL is assigned to Highlands Elementary School (elementary), rated A+; Naperville Central High School (high), rated A+; Kennedy Junior High School (middle), rated A+. All sit in Naperville Community Unit District 203. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 642 S Loomis St, Naperville, IL compare to other homes in Naperville 60540?

Among the 14,044 homes in Naperville 60540, it is worth more than 50% of them ($660,368 against a typical $660,640), its price per square foot is higher than almost all of them ($569 against a typical $261), it is bigger than 4% of them (1,160 ft² against a typical 2,460 ft²), its lot is bigger than 28% of them (0.21 ac against a typical 0.25 ac) and it is newer than 7% of them (1956 against a typical 1983). Measured against all of DuPage County, it is worth more than 77% 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 642 S Loomis St, Naperville, IL?

The 2025 property tax bill for 642 S Loomis St, Naperville, IL was $9,456. The county assessed it at $178,029.

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