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CondominiumResidential
$423,404$266 / 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 Jul 14, 2026

545 BOULDER RIVER DR

O FALLON, MO 63368
2
Beds
2
Baths
1,591 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
2003
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

$423K
$395K low$452K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$423,404
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$338,723

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.$70,736 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$62,066
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$372,297

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.11 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
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.0.15
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 · 232 ft²Porch · 204 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.

M
Francis Howell Middle SchoolA-
Middle · Grades 6–8 · 0.9 mi
E
John Weldon Elementary SchoolC
Elementary · Grades PK–5 · 1.5 mi
H
Francis Howell High SchoolA+
High · Grades 9–12 · 1.8 mi

District: Francis Howell R-Iii 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.$138,193
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

545 Boulder River Dr 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 69% of homes in St. Charles County
  • Costs more per square foot than 96% of homes in O Fallon 63368
  • Smaller than 78% of homes in O Fallon 63368
  • Has a smaller lot than 84% of homes in O Fallon 63368
  • Newer than 72% 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
$190K$756K

This home is worth more than 53% 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$423,404
CheaperTypical $411,797Pricier

Pricier than 53% of homes nearby

Price per ft²$266
CheaperTypical $182Pricier

Pricier than 96% of homes nearby

Living area1,591 ft²
SmallerTypical 2,360 ft²Bigger

Bigger than 22% of homes nearby

Lot size0.15 ac
SmallerTypical 0.23 acBigger

Bigger than 16% of homes nearby

Year built2003
OlderTypical 2000Newer

Newer than 72% of homes nearby

How 545 Boulder River Dr ranks against every home in each area.
MeasureThis homeO Fallon 63368St. Charles County
Estimated valuepricier than$423,40453% of homes69% of homes
Price per ft²pricier than$26696% of homes96% of homes
Living areabigger than1,591 ft²22% of homes31% of homes
Lot sizebigger than0.15 ac16% of homes19% of homes
Year builtnewer than200372% of homes71% of homes

About 545 Boulder River Dr

How much is 545 Boulder River Dr, O Fallon, MO worth?

The TopHap Estimate for 545 Boulder River Dr, O Fallon, MO is $423,404 as of Jul 14, 2026. The likely range is $394,526 to $452,282. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 545 Boulder River Dr, O Fallon, MO last sell?

545 Boulder River Dr, O Fallon, MO last sold on May 17, 2013, according to the county's recorded deed.

How big is 545 Boulder River Dr, O Fallon, MO?

545 Boulder River Dr, O Fallon, MO has 2 bedrooms, 2 bathrooms, 1,591 square feet of living space and a 0.15-acre lot.

When was 545 Boulder River Dr, O Fallon, MO built?

545 Boulder River Dr, O Fallon, MO was built in 2003, making it 23 years old. It is a ranch home. The building has 1 story.

What schools serve 545 Boulder River Dr, O Fallon, MO?

545 Boulder River Dr, O Fallon, MO is assigned to Francis Howell Middle School (middle), rated A-; John Weldon Elementary School (elementary), rated C; 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 545 Boulder River Dr, O Fallon, MO compare to other homes in O Fallon 63368?

Among the 15,025 homes in O Fallon 63368, it is worth more than 53% of them ($423,404 against a typical $411,797), its price per square foot is higher than 96% of them ($266 against a typical $182), it is bigger than 22% of them (1,591 ft² against a typical 2,360 ft²), its lot is bigger than 16% of them (0.15 ac against a typical 0.23 ac) and it is newer than 72% of them (2003 against a typical 2000). 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.

Closest homes

More homes in O Fallon 63368

Assigned schools

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