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Single Family ResidenceResidential
$3,819,033$413 / 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 90How 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 $535,000 on Jul 9, 2019

426 S LOOMIS ST

NAPERVILLE, IL 60540
6.5
Baths
9,241 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.
0.55 ac
Lot SizeThe size of the land the home sits on, from county records.
2022
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$3.8M
$3.4M low$4.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$535,000 · Jul 9, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$57,200 (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.$988,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$231,637
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$756,463
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$910,439
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,964,300

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.1 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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
CountyDUPAGE
Lot (acres)The size of the land the home sits on, from county records.0.55
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
Highlands Elementary SchoolA
Elementary · Grades KG–5 · 0.1 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

426 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.

  • Among the most valuable homes in Naperville 60540
  • Costs more per square foot than 96% of homes in Naperville 60540
  • Among the largest homes in Naperville 60540
  • Has a bigger lot than 92% of homes in Naperville 60540
  • Among the newest 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
$246K$2.1M

This home is worth more than almost all 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$3,819,033
CheaperTypical $651,758Pricier

Pricier than almost all homes nearby

Price per ft²$413
CheaperTypical $261Pricier

Pricier than 96% of homes nearby

Living area9,241 ft²
SmallerTypical 2,460 ft²Bigger

Bigger than almost all homes nearby

Lot size0.55 ac
SmallerTypical 0.25 acBigger

Bigger than 92% of homes nearby

Year built2022
OlderTypical 1983Newer

Newer than almost all homes nearby

How 426 S Loomis St ranks against every home in each area.
MeasureThis homeNaperville 60540DuPage County
Estimated valuepricier than$3,819,033almost all homesalmost all homes
Price per ft²pricier than$41396% of homes95% of homes
Living areabigger than9,241 ft²almost all homesalmost all homes
Lot sizebigger than0.55 ac92% of homes81% of homes
Year builtnewer than2022almost all homesalmost all homes

About 426 S Loomis St

How much is 426 S Loomis St, Naperville, IL worth?

The TopHap Estimate for 426 S Loomis St, Naperville, IL is $3,819,033 as of Sep 24, 2026. The likely range is $3,444,882 to $4,193,184. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 426 S Loomis St, Naperville, IL last sell?

426 S Loomis St, Naperville, IL last sold on Jul 9, 2019 for $535,000, according to the county's recorded deed.

How big is 426 S Loomis St, Naperville, IL?

426 S Loomis St, Naperville, IL has 6.5 bathrooms, 9,241 square feet of living space and a 0.55-acre lot.

When was 426 S Loomis St, Naperville, IL built?

426 S Loomis St, Naperville, IL was built in 2022, making it 4 years old. The building has 2 stories.

What schools serve 426 S Loomis St, Naperville, IL?

426 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 426 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 almost all of them ($3,819,033 against a typical $651,758), its price per square foot is higher than 96% of them ($413 against a typical $261), it is bigger than almost all of them (9,241 ft² against a typical 2,460 ft²), its lot is bigger than 92% of them (0.55 ac against a typical 0.25 ac) and it is newer than almost all of them (2022 against a typical 1983). Measured against all of DuPage County, it is worth more than almost all 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 426 S Loomis St, Naperville, IL?

The 2025 property tax bill for 426 S Loomis St, Naperville, IL was $57,200. The county assessed it at $988,100.

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