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Single Family ResidenceResidential
$415,603$173 / 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 94How 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 $232,500 on Mar 30, 2009

18 CASTLIO CT

SAINT CHARLES, MO 63304
3
Beds
2
Baths
2,399 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1985
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$416K
$391K low$440K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$232,500 · Mar 30, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,876 (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.$65,316 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$59,357
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$343,769

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.0.23
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
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.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 416 ft²Porch · 45 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.

E
Castlio Elementary SchoolA+
Elementary · Grades KG–5 · 0.1 mi
M
Bryan Middle SchoolA+
Middle · Grades 6–8 · 3.7 mi
H
Francis Howell High SchoolA+
High · Grades 9–12 · 6.5 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

18 Castlio 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 65% of homes in St. Charles County
  • Costs less per square foot than 69% of homes in Saint Charles 63304
  • Bigger than 65% of homes in St. Charles County
  • Older than 70% 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
$187K$1.2M

This home is worth more than 56% 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$415,603
CheaperTypical $398,175Pricier

Pricier than 56% of homes nearby

Price per ft²$173
CheaperTypical $193Pricier

Pricier than 31% of homes nearby

Living area2,399 ft²
SmallerTypical 2,165 ft²Bigger

Bigger than 59% of homes nearby

Lot size0.23 ac
SmallerTypical 0.25 acBigger

Bigger than 45% of homes nearby

Year built1985
OlderTypical 1991Newer

Newer than 30% of homes nearby

How 18 Castlio Ct ranks against every home in each area.
MeasureThis homeSaint Charles 63304St. Charles County
Estimated valuepricier than$415,60356% of homes65% of homes
Price per ft²pricier than$17331% of homes40% of homes
Living areabigger than2,399 ft²59% of homes65% of homes
Lot sizebigger than0.23 ac45% of homes56% of homes
Year builtnewer than198530% of homes32% of homes

About 18 Castlio Ct

How much is 18 Castlio Ct, Saint Charles, MO worth?

The TopHap Estimate for 18 Castlio Ct, Saint Charles, MO is $415,603 as of Sep 24, 2026. The likely range is $391,332 to $439,874. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Castlio Ct, Saint Charles, MO last sell?

18 Castlio Ct, Saint Charles, MO last sold on Mar 30, 2009 for $232,500, according to the county's recorded deed.

How big is 18 Castlio Ct, Saint Charles, MO?

18 Castlio Ct, Saint Charles, MO has 3 bedrooms, 2 bathrooms, 2,399 square feet of living space and a 0.23-acre lot.

When was 18 Castlio Ct, Saint Charles, MO built?

18 Castlio Ct, Saint Charles, MO was built in 1985, making it 41 years old. It is a ranch home. The building has 1 story.

What schools serve 18 Castlio Ct, Saint Charles, MO?

18 Castlio Ct, Saint Charles, MO is assigned to Castlio Elementary School (elementary), rated A+; Bryan Middle School (middle), 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 18 Castlio Ct, Saint Charles, MO compare to other homes in Saint Charles 63304?

Among the 15,716 homes in Saint Charles 63304, it is worth more than 56% of them ($415,603 against a typical $398,175), its price per square foot is higher than 31% of them ($173 against a typical $193), it is bigger than 59% of them (2,399 ft² against a typical 2,165 ft²), its lot is bigger than 45% of them (0.23 ac against a typical 0.25 ac) and it is newer than 30% of them (1985 against a typical 1991). Measured against all of St. Charles County, it is worth more than 65% 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 18 Castlio Ct, Saint Charles, MO?

The 2025 property tax bill for 18 Castlio Ct, Saint Charles, MO was $3,876. The county assessed it at $65,316.

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