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Single Family ResidenceResidential
$798,988$272 / 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 Jul 14, 2026
Last sold for $540,500 on Dec 13, 2016

521 STILL HOLLOW RUN

O FALLON, IL 62269
0
Baths
2,936 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.
1.12 ac
Lot SizeThe size of the land the home sits on, from county records.
2016
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

$799K
$772K low$826K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$540,500 · Dec 13, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,450 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$236,589 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$48,281
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$188,308
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$236,589
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$709,767

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.50
50
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
25
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
82
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
69
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
24
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.14 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
Lot (acres)The size of the land the home sits on, from county records.1.12
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Mixed
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.Porch · 1,056 ft²

Transaction History(2)

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
Fulton Junior High SchoolA-
Middle · Grades 6–8 · 0.6 mi
E
Hinchcliffe Elementary SchoolB
Elementary · Grades EE–5 · 1.6 mi
H
O'Fallon Township High SchoolB-
High · Grades 9–12 · 2.9 mi

District: O'Fallon Community Consolidated School District 90

Neighborhood · ZIP 62269These 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.66
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.163

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.7%
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.33,610
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,140 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$105,165
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,936
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

521 Still Hollow Run 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 O Fallon 62269
  • Costs more per square foot than 88% of homes in St. Clair County
  • Among the largest homes in O Fallon 62269
  • Has a bigger lot than 93% of homes in O Fallon 62269
  • Among the newest homes in St. Clair County

What homes are worth in O Fallon 62269

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

This home
$123K$706K

This home is worth more than almost all homes in O Fallon 62269.

How it measures up in O Fallon 62269

The dot is this home. The mark in the middle is the typical home in O Fallon 62269.

Estimated value$798,988
CheaperTypical $341,767Pricier

Pricier than almost all homes nearby

Price per ft²$272
CheaperTypical $231Pricier

Pricier than 64% of homes nearby

Living area2,936 ft²
SmallerTypical 1,274 ft²Bigger

Bigger than almost all homes nearby

Lot size1.12 ac
SmallerTypical 0.28 acBigger

Bigger than 93% of homes nearby

Year built2016
OlderTypical 1992Newer

Newer than 98% of homes nearby

How 521 Still Hollow Run ranks against every home in each area.
MeasureThis homeO Fallon 62269St. Clair County
Estimated valuepricier than$798,988almost all homesalmost all homes
Price per ft²pricier than$27264% of homes88% of homes
Living areabigger than2,936 ft²almost all homesalmost all homes
Lot sizebigger than1.12 ac93% of homes89% of homes
Year builtnewer than201698% of homesalmost all homes

About 521 Still Hollow Run

How much is 521 Still Hollow Run, O Fallon, IL worth?

The TopHap Estimate for 521 Still Hollow Run, O Fallon, IL is $798,988 as of Jul 14, 2026. The likely range is $772,258 to $825,719. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 Still Hollow Run, O Fallon, IL last sell?

521 Still Hollow Run, O Fallon, IL last sold on Dec 13, 2016 for $540,500, according to the county's recorded deed.

How big is 521 Still Hollow Run, O Fallon, IL?

521 Still Hollow Run, O Fallon, IL has 2,936 square feet of living space and a 1.12-acre lot.

When was 521 Still Hollow Run, O Fallon, IL built?

521 Still Hollow Run, O Fallon, IL was built in 2016, making it 10 years old. The building has 1 story.

What schools serve 521 Still Hollow Run, O Fallon, IL?

521 Still Hollow Run, O Fallon, IL is assigned to Fulton Junior High School (middle), rated A-; Hinchcliffe Elementary School (elementary), rated B; O'Fallon Township High School (high), rated B-. All sit in O'Fallon Community Consolidated School District 90. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Still Hollow Run, O Fallon, IL compare to other homes in O Fallon 62269?

Among the 12,187 homes in O Fallon 62269, it is worth more than almost all of them ($798,988 against a typical $341,767), its price per square foot is higher than 64% of them ($272 against a typical $231), it is bigger than almost all of them (2,936 ft² against a typical 1,274 ft²), its lot is bigger than 93% of them (1.12 ac against a typical 0.28 ac) and it is newer than 98% of them (2016 against a typical 1992). Measured against all of St. Clair 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 521 Still Hollow Run, O Fallon, IL?

The 2024 property tax bill for 521 Still Hollow Run, O Fallon, IL was $16,450. The county assessed it at $236,589.

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