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Single Family ResidenceResidential
$1,155,849$229 / 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 95How 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
Last sold for $1,095,000 on Mar 25, 2024

9 WINDCASTLE PL

SAINT CHARLES, MO 63304
4
Beds
4 / 2
Baths
5,050 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.
0.79 ac
Lot SizeThe size of the land the home sits on, from county records.
1997
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.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.2M
$1.1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,095,000 · Mar 25, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,326 (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.$168,516 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$157,822
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$886,928

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.0.79
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.Porch · 10 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.

M
Bryan Middle SchoolA+
Middle · Grades 6–8 · 3.0 mi
E
Independence Elementary SchoolA+
Elementary · Grades KG–5 · 3.0 mi
H
Francis Howell High SchoolA+
High · Grades 9–12 · 5.8 mi

District: Francis Howell R-Iii School District

Neighborhood · ZIP 63304These 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.61
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 100.111

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.28%
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.1.1%
PopulationHow many people live in this area.46,310
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,135 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$116,163
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$146,086
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

9 Windcastle Pl 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 St. Charles County
  • Costs more per square foot than 83% of homes in St. Charles County
  • Among the largest homes in St. Charles County
  • Has a bigger lot than 91% of homes in Saint Charles 63304
  • Newer than 73% of homes in Saint Charles 63304

What homes are worth in Saint Charles 63304

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

This home
$191K$1.2M

This home is worth more than 98% of homes in Saint Charles 63304.

How it measures up in Saint Charles 63304

The dot is this home. The mark in the middle is the typical home in Saint Charles 63304.

Estimated value$1,155,849
CheaperTypical $398,645Pricier

Pricier than 98% of homes nearby

Price per ft²$229
CheaperTypical $193Pricier

Pricier than 79% of homes nearby

Living area5,050 ft²
SmallerTypical 2,164 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.79 ac
SmallerTypical 0.25 acBigger

Bigger than 91% of homes nearby

Year built1997
OlderTypical 1991Newer

Newer than 73% of homes nearby

How 9 Windcastle Pl ranks against every home in each area.
MeasureThis homeSaint Charles 63304St. Charles County
Estimated valuepricier than$1,155,84998% of homesalmost all homes
Price per ft²pricier than$22979% of homes83% of homes
Living areabigger than5,050 ft²97% of homesalmost all homes
Lot sizebigger than0.79 ac91% of homes91% of homes
Year builtnewer than199773% of homes55% of homes

About 9 Windcastle Pl

How much is 9 Windcastle Pl, Saint Charles, MO worth?

The TopHap Estimate for 9 Windcastle Pl, Saint Charles, MO is $1,155,849 as of Sep 24, 2026. The likely range is $1,093,343 to $1,218,355. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9 Windcastle Pl, Saint Charles, MO last sell?

9 Windcastle Pl, Saint Charles, MO last sold on Mar 25, 2024 for $1,095,000, according to the county's recorded deed.

How big is 9 Windcastle Pl, Saint Charles, MO?

9 Windcastle Pl, Saint Charles, MO has 4 bedrooms, 4 bathrooms, 5,050 square feet of living space and a 0.79-acre lot.

When was 9 Windcastle Pl, Saint Charles, MO built?

9 Windcastle Pl, Saint Charles, MO was built in 1997, making it 29 years old. It is a bi-level home. The building has 2 stories.

What schools serve 9 Windcastle Pl, Saint Charles, MO?

9 Windcastle Pl, Saint Charles, MO is assigned to Bryan Middle School (middle), rated A+; Independence Elementary School (elementary), rated A+; Francis Howell 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 9 Windcastle Pl, Saint Charles, MO compare to other homes in Saint Charles 63304?

Among the 15,715 homes in Saint Charles 63304, it is worth more than 98% of them ($1,155,849 against a typical $398,645), its price per square foot is higher than 79% of them ($229 against a typical $193), it is bigger than 97% of them (5,050 ft² against a typical 2,164 ft²), its lot is bigger than 91% of them (0.79 ac against a typical 0.25 ac) and it is newer than 73% of them (1997 against a typical 1991). Measured against all of St. Charles 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 9 Windcastle Pl, Saint Charles, MO?

The 2025 property tax bill for 9 Windcastle Pl, Saint Charles, MO was $9,326. The county assessed it at $168,516.

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