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CondominiumResidential
$422,515$145 / 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 90How 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
Last sold for $425,000 on Feb 28, 2025

527 BOULDER RIVER DR

O FALLON, MO 63368
2
Beds
3
Baths
2,921 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
2002
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
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
$379K low$466K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$425,000 · Feb 28, 2025
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.$24,515
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$19,612
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.94%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$398,000
GUILD MORTGAGE CO · recorded Oct 14, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,579 (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.$71,873 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$64,648
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$378,279

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.Spanish
CountyST. CHARLES
Lot (acres)The size of the land the home sits on, from county records.0.11
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.Patio · 144 ft²Porch · 36 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.Owner occupied
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

527 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 less per square foot than 84% of homes in O Fallon 63368
  • Bigger than 81% of homes in St. Charles County
  • Has a smaller lot than 90% of homes in O Fallon 63368
  • Newer than 68% of homes in St. Charles County

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
$191K$742K

This home is worth more than 54% 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$422,515
CheaperTypical $411,254Pricier

Pricier than 54% of homes nearby

Price per ft²$145
CheaperTypical $181Pricier

Pricier than 16% of homes nearby

Living area2,921 ft²
SmallerTypical 2,370 ft²Bigger

Bigger than 70% of homes nearby

Lot size0.11 ac
SmallerTypical 0.23 acBigger

Bigger than 10% of homes nearby

Year built2002
OlderTypical 2000Newer

Newer than 67% of homes nearby

How 527 Boulder River Dr ranks against every home in each area.
MeasureThis homeO Fallon 63368St. Charles County
Estimated valuepricier than$422,51554% of homes69% of homes
Price per ft²pricier than$14516% of homes19% of homes
Living areabigger than2,921 ft²70% of homes81% of homes
Lot sizebigger than0.11 ac10% of homes12% of homes
Year builtnewer than200267% of homes68% of homes

About 527 Boulder River Dr

How much is 527 Boulder River Dr, O Fallon, MO worth?

The TopHap Estimate for 527 Boulder River Dr, O Fallon, MO is $422,515 as of Jul 14, 2026. The likely range is $379,334 to $465,696. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 527 Boulder River Dr, O Fallon, MO last sell?

527 Boulder River Dr, O Fallon, MO last sold on Feb 28, 2025 for $425,000, according to the county's recorded deed.

How big is 527 Boulder River Dr, O Fallon, MO?

527 Boulder River Dr, O Fallon, MO has 2 bedrooms, 3 bathrooms, 2,921 square feet of living space and a 0.11-acre lot.

When was 527 Boulder River Dr, O Fallon, MO built?

527 Boulder River Dr, O Fallon, MO was built in 2002, making it 24 years old. It is a spanish home. The building has 1 story.

What schools serve 527 Boulder River Dr, O Fallon, MO?

527 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 527 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 54% of them ($422,515 against a typical $411,254), its price per square foot is higher than 16% of them ($145 against a typical $181), it is bigger than 70% of them (2,921 ft² against a typical 2,370 ft²), its lot is bigger than 10% of them (0.11 ac against a typical 0.23 ac) and it is newer than 67% of them (2002 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.

What are the property taxes on 527 Boulder River Dr, O Fallon, MO?

The 2025 property tax bill for 527 Boulder River Dr, O Fallon, MO was $4,579. The county assessed it at $71,873.

Closest homes

More homes in O Fallon 63368

Assigned schools

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