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Single Family ResidenceResidential
$1,978,813$353 / 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 97How 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 $1,965,000 on Jun 30, 2026

340 SPRING AVE

NAPERVILLE, IL 60540
4
Beds
4.5
Baths
5,611 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.
0.36 ac
Lot SizeThe size of the land the home sits on, from county records.
2009
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2M
$1.9M low$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.$1,965,000 · Jun 30, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$30,606 (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.$532,903 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$154,652
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$378,251
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$485,915
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,598,709

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.0.36
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
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(6)

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
Washington Junior High SchoolA
Middle · Grades 5–8 · 0.3 mi
E
Naper Elementary SchoolA+
Elementary · Grades KG–4 · 0.3 mi
H
Naperville North High SchoolA+
High · Grades 9–12 · 0.5 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

340 Spring 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.

  • Among the most valuable homes in DuPage County
  • Costs more per square foot than 91% of homes in Naperville 60540
  • Among the largest homes in DuPage County
  • Has a bigger lot than 82% of homes in Naperville 60540
  • Newer than 96% of homes in DuPage County

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
$238K$2.2M

This home is worth more than 97% 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$1,978,813
CheaperTypical $651,854Pricier

Pricier than 97% of homes nearby

Price per ft²$353
CheaperTypical $262Pricier

Pricier than 91% of homes nearby

Living area5,611 ft²
SmallerTypical 2,454 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.36 ac
SmallerTypical 0.25 acBigger

Bigger than 82% of homes nearby

Year built2009
OlderTypical 1983Newer

Newer than 93% of homes nearby

How 340 Spring Ave ranks against every home in each area.
MeasureThis homeNaperville 60540DuPage County
Estimated valuepricier than$1,978,81397% of homesalmost all homes
Price per ft²pricier than$35391% of homes89% of homes
Living areabigger than5,611 ft²95% of homesalmost all homes
Lot sizebigger than0.36 ac82% of homes71% of homes
Year builtnewer than200993% of homes96% of homes

About 340 Spring Ave

How much is 340 Spring Ave, Naperville, IL worth?

The TopHap Estimate for 340 Spring Ave, Naperville, IL is $1,978,813 as of Sep 24, 2026. The likely range is $1,927,657 to $2,029,968. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 340 Spring Ave, Naperville, IL last sell?

340 Spring Ave, Naperville, IL last sold on Jun 30, 2026 for $1,965,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 340 Spring Ave, Naperville, IL?

340 Spring Ave, Naperville, IL has 4 bedrooms, 4.5 bathrooms, 5,611 square feet of living space and a 0.36-acre lot.

When was 340 Spring Ave, Naperville, IL built?

340 Spring Ave, Naperville, IL was built in 2009, making it 17 years old. The building has 2 stories.

What schools serve 340 Spring Ave, Naperville, IL?

340 Spring Ave, Naperville, IL is assigned to Washington Junior High School (middle), rated A; Naper Elementary School (elementary), rated A+; Naperville North High School (high), rated A+. All sit in Naperville Community Unit District 203. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 340 Spring Ave, Naperville, IL compare to other homes in Naperville 60540?

Among the 14,044 homes in Naperville 60540, it is worth more than 97% of them ($1,978,813 against a typical $651,854), its price per square foot is higher than 91% of them ($353 against a typical $262), it is bigger than 95% of them (5,611 ft² against a typical 2,454 ft²), its lot is bigger than 82% of them (0.36 ac against a typical 0.25 ac) and it is newer than 93% of them (2009 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 340 Spring Ave, Naperville, IL?

The 2025 property tax bill for 340 Spring Ave, Naperville, IL was $30,606. The county assessed it at $532,903.

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