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Single Family ResidenceResidential
$351,966$176 / 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 Aug 30, 2026
Last sold for $206,300 on Aug 19, 2015

4 KNOLL RIDGE CT

O FALLON, MO 63368
3
Beds
3
Baths
1,998 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1998
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$352K
$342K low$362K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$206,300 · Aug 19, 2015

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,694 (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.$57,454 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$52,152
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$302,391

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyST. CHARLES
Lot (acres)The size of the land the home sits on, from county records.0.18
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.Garage, Attached
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.DeckPatio · 269 ft²Porch · 48 ft²

Transaction History(4)

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
Dardenne Elementary SchoolC-
Elementary · Grades KG–5 · 0.3 mi
H
Fort Zumwalt West High SchoolA+
High · Grades 9–12 · 1.8 mi
M
Fort Zumwalt West Middle SchoolA
Middle · Grades 6–8 · 1.9 mi

District: Fort Zumwalt R-Ii School District

Neighborhood · ZIP 63368These 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.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.100

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.49,861
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,210 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$119,542
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$138,192
Average tempThe average temperature here across a full year.55°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.57%

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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

4 Knoll Ridge Ct 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 73% of homes in O Fallon 63368
  • Has a smaller lot than 70% of homes in O Fallon 63368

What homes are worth in O Fallon 63368

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

This home
$209K$799K

This home is worth more than 27% of homes in O Fallon 63368.

How it measures up in O Fallon 63368

The dot is this home. The mark in the middle is the typical home in O Fallon 63368.

Estimated value$351,966
CheaperTypical $421,923Pricier

Pricier than 27% of homes nearby

Price per ft²$176
CheaperTypical $184Pricier

Pricier than 42% of homes nearby

Living area1,998 ft²
SmallerTypical 2,358 ft²Bigger

Bigger than 38% of homes nearby

Lot size0.18 ac
SmallerTypical 0.23 acBigger

Bigger than 30% of homes nearby

Year built1998
OlderTypical 2000Newer

Newer than 41% of homes nearby

How 4 Knoll Ridge Ct ranks against every home in each area.
MeasureThis homeO Fallon 63368St. Charles County
Estimated valuepricier than$351,96627% of homes46% of homes
Price per ft²pricier than$17642% of homes43% of homes
Living areabigger than1,998 ft²38% of homes51% of homes
Lot sizebigger than0.18 ac30% of homes31% of homes
Year builtnewer than199841% of homes57% of homes

About 4 Knoll Ridge Ct

How much is 4 Knoll Ridge Ct, O Fallon, MO worth?

The TopHap Estimate for 4 Knoll Ridge Ct, O Fallon, MO is $351,966 as of Aug 30, 2026. The likely range is $341,796 to $362,136. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Knoll Ridge Ct, O Fallon, MO last sell?

4 Knoll Ridge Ct, O Fallon, MO last sold on Aug 19, 2015 for $206,300, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4 Knoll Ridge Ct, O Fallon, MO?

4 Knoll Ridge Ct, O Fallon, MO has 3 bedrooms, 3 bathrooms, 1,998 square feet of living space and a 0.18-acre lot.

When was 4 Knoll Ridge Ct, O Fallon, MO built?

4 Knoll Ridge Ct, O Fallon, MO was built in 1998, making it 28 years old. It is a ranch home. The building has 1 story.

What schools serve 4 Knoll Ridge Ct, O Fallon, MO?

4 Knoll Ridge Ct, O Fallon, MO is assigned to Dardenne Elementary School (elementary), rated C-; Fort Zumwalt West High School (high), rated A+; Fort Zumwalt West Middle School (middle), rated A. All sit in Fort Zumwalt R-Ii School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4 Knoll Ridge Ct, O Fallon, MO compare to other homes in O Fallon 63368?

Among the 15,024 homes in O Fallon 63368, it is worth more than 27% of them ($351,966 against a typical $421,923), its price per square foot is higher than 42% of them ($176 against a typical $184), it is bigger than 38% of them (1,998 ft² against a typical 2,358 ft²), its lot is bigger than 30% of them (0.18 ac against a typical 0.23 ac) and it is newer than 41% of them (1998 against a typical 2000). Measured against all of St. Charles County, it is worth more than 46% 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 4 Knoll Ridge Ct, O Fallon, MO?

The 2025 property tax bill for 4 Knoll Ridge Ct, O Fallon, MO was $3,694. The county assessed it at $57,454.

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