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Single Family ResidenceResidential
$434,352$134 / 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 Aug 30, 2026

309 ROTUNDA CT

SAINT CHARLES, MO 63303
4
Beds
3 / 2
Baths
3,250 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.
1984
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$434K
$402K low$466K high

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$80,743 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$72,178
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$424,965

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.Bi-Level
CountyST. CHARLES
Lot (acres)The size of the land the home sits on, from county records.0.18
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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 · 788 ft²Porch · 90 ft²

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

E
Becky-David Elementary SchoolC+
Elementary · Grades PK–5 · 0.7 mi
M
Barnwell Middle SchoolA
Middle · Grades 6–8 · 0.8 mi
H
Francis Howell North High SchoolA-
High · Grades 9–12 · 1.4 mi

District: Francis Howell R-Iii School District

Neighborhood · ZIP 63303These 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.109
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.120

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.1%
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.49,298
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,208 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,943
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$126,979
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

309 Rotunda 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 more than 72% of homes in Saint Charles 63303
  • Costs less per square foot than 92% of homes in St. Charles County
  • Bigger than 87% of homes in Saint Charles 63303
  • Has a smaller lot than 72% of homes in St. Charles County
  • Older than 70% of homes in St. Charles County

What homes are worth in Saint Charles 63303

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

This home
$135K$724K

This home is worth more than 72% of homes in Saint Charles 63303.

How it measures up in Saint Charles 63303

The dot is this home. The mark in the middle is the typical home in Saint Charles 63303.

Estimated value$434,352
CheaperTypical $354,077Pricier

Pricier than 72% of homes nearby

Price per ft²$134
CheaperTypical $172Pricier

Pricier than 13% of homes nearby

Living area3,250 ft²
SmallerTypical 2,021 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.18 ac
SmallerTypical 0.22 acBigger

Bigger than 32% of homes nearby

Year built1984
OlderTypical 1988Newer

Newer than 35% of homes nearby

How 309 Rotunda Ct ranks against every home in each area.
MeasureThis homeSaint Charles 63303St. Charles County
Estimated valuepricier than$434,35272% of homes69% of homes
Price per ft²pricier than$13413% of homes8% of homes
Living areabigger than3,250 ft²87% of homes87% of homes
Lot sizebigger than0.18 ac32% of homes28% of homes
Year builtnewer than198435% of homes30% of homes

About 309 Rotunda Ct

How much is 309 Rotunda Ct, Saint Charles, MO worth?

The TopHap Estimate for 309 Rotunda Ct, Saint Charles, MO is $434,352 as of Aug 30, 2026. The likely range is $402,278 to $466,426. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Rotunda Ct, Saint Charles, MO last sell?

309 Rotunda Ct, Saint Charles, MO last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 309 Rotunda Ct, Saint Charles, MO?

309 Rotunda Ct, Saint Charles, MO has 4 bedrooms, 3 bathrooms, 3,250 square feet of living space and a 0.18-acre lot.

When was 309 Rotunda Ct, Saint Charles, MO built?

309 Rotunda Ct, Saint Charles, MO was built in 1984, making it 42 years old. It is a bi-level home. The building has 2 stories.

What schools serve 309 Rotunda Ct, Saint Charles, MO?

309 Rotunda Ct, Saint Charles, MO is assigned to Becky-David Elementary School (elementary), rated C+; Barnwell Middle School (middle), rated A; Francis Howell North High School (high), rated A-. All sit in Francis Howell R-Iii School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Rotunda Ct, Saint Charles, MO compare to other homes in Saint Charles 63303?

Among the 16,151 homes in Saint Charles 63303, it is worth more than 72% of them ($434,352 against a typical $354,077), its price per square foot is higher than 13% of them ($134 against a typical $172), it is bigger than 87% of them (3,250 ft² against a typical 2,021 ft²), its lot is bigger than 32% of them (0.18 ac against a typical 0.22 ac) and it is newer than 35% of them (1984 against a typical 1988). Measured against all of St. Charles County, it is worth more than 69% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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