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Single Family ResidenceResidential
$649,900$268 / 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

451 FLOCK AVE

NAPERVILLE, IL 60565
2.5
Baths
2,427 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$650K
$623K low$677K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,091 (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.$206,034 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$85,275
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$120,759
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$189,841
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$618,102

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.0.26
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.

M
Lincoln Junior High SchoolA+
Middle · Grades 6–8 · 0.5 mi
E
Maplebrook Elementary SchoolA+
Elementary · Grades KG–5 · 0.7 mi
H
Naperville Central High SchoolA+
High · Grades 9–12 · 1.8 mi

District: Naperville Community Unit District 203

Neighborhood · ZIP 60565These 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.25
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 100.56

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.0%
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.38,555
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,445 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$151,582
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$178,271
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

451 Flock 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 more than 76% of homes in DuPage County
  • Bigger than 71% of homes in DuPage County

What homes are worth in Naperville 60565

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

This home
$214K$1.3M

This home is worth more than 52% of homes in Naperville 60565.

How it measures up in Naperville 60565

The dot is this home. The mark in the middle is the typical home in Naperville 60565.

Estimated value$649,900
CheaperTypical $637,918Pricier

Pricier than 52% of homes nearby

Price per ft²$268
CheaperTypical $261Pricier

Pricier than 59% of homes nearby

Living area2,427 ft²
SmallerTypical 2,436 ft²Bigger

Bigger than 50% of homes nearby

Lot size0.26 ac
SmallerTypical 0.25 acBigger

Bigger than 60% of homes nearby

Year built1985
OlderTypical 1986Newer

Newer than 43% of homes nearby

How 451 Flock Ave ranks against every home in each area.
MeasureThis homeNaperville 60565DuPage County
Estimated valuepricier than$649,90052% of homes76% of homes
Price per ft²pricier than$26859% of homes63% of homes
Living areabigger than2,427 ft²50% of homes71% of homes
Lot sizebigger than0.26 ac60% of homes58% of homes
Year builtnewer than198543% of homes64% of homes

About 451 Flock Ave

How much is 451 Flock Ave, Naperville, IL worth?

The TopHap Estimate for 451 Flock Ave, Naperville, IL is $649,900 as of Sep 24, 2026. The likely range is $622,818 to $676,982. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 451 Flock Ave, Naperville, IL last sell?

451 Flock Ave, Naperville, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 451 Flock Ave, Naperville, IL?

451 Flock Ave, Naperville, IL has 2.5 bathrooms, 2,427 square feet of living space and a 0.26-acre lot.

When was 451 Flock Ave, Naperville, IL built?

451 Flock Ave, Naperville, IL was built in 1985, making it 41 years old. The building has 2 stories.

What schools serve 451 Flock Ave, Naperville, IL?

451 Flock Ave, Naperville, IL is assigned to Lincoln Junior High School (middle), rated A+; Maplebrook Elementary School (elementary), rated A+; Naperville Central 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 451 Flock Ave, Naperville, IL compare to other homes in Naperville 60565?

Among the 13,214 homes in Naperville 60565, it is worth more than 52% of them ($649,900 against a typical $637,918), its price per square foot is higher than 59% of them ($268 against a typical $261), it is bigger than 50% of them (2,427 ft² against a typical 2,436 ft²), its lot is bigger than 60% of them (0.26 ac against a typical 0.25 ac) and it is newer than 43% of them (1985 against a typical 1986). Measured against all of DuPage County, it is worth more than 76% 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 451 Flock Ave, Naperville, IL?

The 2025 property tax bill for 451 Flock Ave, Naperville, IL was $11,091. The county assessed it at $206,034.

More homes on Flock Ave

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Assigned schools

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