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Single Family ResidenceResidential
$126,631$116 / 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 93How 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

520 S MAIN ST

DUPO, IL 62239
2
Baths
1,091 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1933
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$127K
$118K low$136K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,423 (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.$38,822 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$3,318
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$35,504
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$35,402
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$116,466

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.51
93
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
83
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
73
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
8
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.144 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
CountyST. CLAIR
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1985
Lot (acres)The size of the land the home sits on, from county records.0.13
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
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 262 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Dupo Jr. High SchoolC+
Middle · Grades 7–8 · 0.1 mi
H
Dupo Sr. High SchoolD
High · Grades 9–12 · 0.1 mi
E
Bluffview Elementary SchoolC+
Elementary · Grades PK–6 · 0.3 mi

District: Dupo Community Unit School District 196

Neighborhood · ZIP 62239These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.157

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.4,070
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.463 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$65,871
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,604
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.40 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

520 S Main 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 less than 66% of homes in St. Clair County
  • Costs less per square foot than 67% of homes in St. Clair County
  • Has a smaller lot than 91% of homes in Dupo 62239
  • Older than 82% of homes in St. Clair County

What homes are worth in Dupo 62239

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

This home
$54K$294K

This home is worth more than 41% of homes in Dupo 62239.

How it measures up in Dupo 62239

The dot is this home. The mark in the middle is the typical home in Dupo 62239.

Estimated value$126,631
CheaperTypical $140,217Pricier

Pricier than 41% of homes nearby

Price per ft²$116
CheaperTypical $127Pricier

Pricier than 37% of homes nearby

Living area1,091 ft²
SmallerTypical 1,092 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.13 ac
SmallerTypical 0.22 acBigger

Bigger than 9% of homes nearby

Year built1933
OlderTypical 1957Newer

Newer than 26% of homes nearby

How 520 S Main St ranks against every home in each area.
MeasureThis homeDupo 62239St. Clair County
Estimated valuepricier than$126,63141% of homes34% of homes
Price per ft²pricier than$11637% of homes33% of homes
Living areabigger than1,091 ft²48% of homes41% of homes
Lot sizebigger than0.13 ac9% of homes9% of homes
Year builtnewer than193326% of homes18% of homes

About 520 S Main St

How much is 520 S Main St, Dupo, IL worth?

The TopHap Estimate for 520 S Main St, Dupo, IL is $126,631 as of Oct 21, 2026. The likely range is $117,740 to $135,522. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 520 S Main St, Dupo, IL last sell?

520 S Main St, Dupo, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 520 S Main St, Dupo, IL?

520 S Main St, Dupo, IL has 2 bathrooms, 1,091 square feet of living space and a 0.13-acre lot.

When was 520 S Main St, Dupo, IL built?

520 S Main St, Dupo, IL was built in 1933, making it 93 years old. The building has 1 story.

What schools serve 520 S Main St, Dupo, IL?

520 S Main St, Dupo, IL is assigned to Dupo Jr. High School (middle), rated C+; Dupo Sr. High School (high), rated D; Bluffview Elementary School (elementary), rated C+. All sit in Dupo Community Unit School District 196. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 520 S Main St, Dupo, IL compare to other homes in Dupo 62239?

Among the 1,728 homes in Dupo 62239, it is worth more than 41% of them ($126,631 against a typical $140,217), its price per square foot is higher than 37% of them ($116 against a typical $127), it is bigger than 48% of them (1,091 ft² against a typical 1,092 ft²), its lot is bigger than 9% of them (0.13 ac against a typical 0.22 ac) and it is newer than 26% of them (1933 against a typical 1957). Measured against all of St. Clair County, it is worth more than 34% 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 520 S Main St, Dupo, IL?

The 2025 property tax bill for 520 S Main St, Dupo, IL was $2,423. The county assessed it at $38,822.

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