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Single Family ResidenceResidential
$326,576$179 / 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 Sep 24, 2026

18 BLACKSTONE CT

SAINT CHARLES, MO 63303
3
Beds
2
Baths
1,823 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.
0.21 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.
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

$327K
$316K low$337K 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.$49,986 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$44,502
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$263,084

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.0.21
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
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 · 20 ft²

Transaction History(1)

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.

H
Francis Howell North High SchoolA
High · Grades 9–12 · 1.1 mi
E
Henderson Elementary SchoolA
Elementary · Grades KG–5 · 1.3 mi
M
Hollenbeck Middle SchoolA+
Middle · Grades 6–8 · 4.3 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

18 Blackstone 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.

  • 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
$133K$738K

This home is worth more than 42% 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$326,576
CheaperTypical $353,114Pricier

Pricier than 42% of homes nearby

Price per ft²$179
CheaperTypical $171Pricier

Pricier than 58% of homes nearby

Living area1,823 ft²
SmallerTypical 2,024 ft²Bigger

Bigger than 42% of homes nearby

Lot size0.21 ac
SmallerTypical 0.22 acBigger

Bigger than 46% of homes nearby

Year built1984
OlderTypical 1988Newer

Newer than 35% of homes nearby

How 18 Blackstone Ct ranks against every home in each area.
MeasureThis homeSaint Charles 63303St. Charles County
Estimated valuepricier than$326,57642% of homes38% of homes
Price per ft²pricier than$17958% of homes45% of homes
Living areabigger than1,823 ft²42% of homes44% of homes
Lot sizebigger than0.21 ac46% of homes46% of homes
Year builtnewer than198435% of homes30% of homes

About 18 Blackstone Ct

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

The TopHap Estimate for 18 Blackstone Ct, Saint Charles, MO is $326,576 as of Sep 24, 2026. The likely range is $315,694 to $337,458. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

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

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

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

18 Blackstone Ct, Saint Charles, MO has 3 bedrooms, 2 bathrooms, 1,823 square feet of living space and a 0.21-acre lot.

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

18 Blackstone 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 18 Blackstone Ct, Saint Charles, MO?

18 Blackstone Ct, Saint Charles, MO is assigned to Francis Howell North High School (high), rated A; Henderson Elementary School (elementary), rated A; Hollenbeck Middle School (middle), 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 Blackstone 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 42% of them ($326,576 against a typical $353,114), its price per square foot is higher than 58% of them ($179 against a typical $171), it is bigger than 42% of them (1,823 ft² against a typical 2,024 ft²), its lot is bigger than 46% of them (0.21 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 38% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

More homes on Blackstone Ct

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Assigned schools

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