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CondominiumResidential
$275,000$193 / 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 $256,690 on Aug 1, 2025

636 WALNUT RIDGE DR

BALLWIN, MO 63021
2
Beds
2.5
Baths
1,424 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.
1,424 ft²
Lot SizeThe size of the land the home sits on, from county records.
1979
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$275K
$249K low$301K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$256,690 · Aug 1, 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.$82,000
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$65,600
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.80%
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.$193,000
FCB BANKS · recorded Aug 1, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,434 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$40,260 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$11,910
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$28,350
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$37,710
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$211,900

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.44
38
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
15
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
87
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
75
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
8
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.7 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.Townhouse
CountyST. LOUIS
Lot (acres)The size of the land the home sits on, from county records.0.03
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.No Foundation
HeatingThe type of heating system in the home.Electric
CoolingThe type of cooling or air conditioning in the home.Central
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.Deck · 80 ft²Patio · 80 ft²Porch · 35 ft²

Transaction History(7)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(2)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Wren Hollow Elementary SchoolC-
Elementary · Grades KG–5 · 0.8 mi
M
Southwest Middle SchoolC+
Middle · Grades 6–8 · 0.8 mi
H
South High SchoolB+
High · Grades 9–12 · 1.0 mi

District: Parkway School District

Neighborhood · ZIP 63021These 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.41
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.129

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.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.55,113
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,498 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,595
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$131,969
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.42 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.Yes

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

636 Walnut Ridge 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 less than 79% of homes in Ballwin 63021
  • Costs less per square foot than 73% of homes in Ballwin 63021
  • Has a smaller lot than 95% of homes in St. Louis County
  • Newer than 73% of homes in St. Louis County

What homes are worth in Ballwin 63021

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

This home
$174K$844K

This home is worth more than 21% of homes in Ballwin 63021.

How it measures up in Ballwin 63021

The dot is this home. The mark in the middle is the typical home in Ballwin 63021.

Estimated value$275,000
CheaperTypical $364,556Pricier

Pricier than 21% of homes nearby

Price per ft²$193
CheaperTypical $214Pricier

Pricier than 27% of homes nearby

Living area1,424 ft²
SmallerTypical 1,674 ft²Bigger

Bigger than 37% of homes nearby

Lot size1,424 ft²
SmallerTypical 0.21 acBigger

Bigger than 8% of homes nearby

Year built1979
OlderTypical 1983Newer

Newer than 46% of homes nearby

How 636 Walnut Ridge Dr ranks against every home in each area.
MeasureThis homeBallwin 63021St. Louis County
Estimated valuepricier than$275,00021% of homes50% of homes
Price per ft²pricier than$19327% of homes54% of homes
Living areabigger than1,424 ft²37% of homes49% of homes
Lot sizebigger than1,424 ft²8% of homes5% of homes
Year builtnewer than197946% of homes73% of homes

About 636 Walnut Ridge Dr

How much is 636 Walnut Ridge Dr, Ballwin, MO worth?

The TopHap Estimate for 636 Walnut Ridge Dr, Ballwin, MO is $275,000 as of Jul 14, 2026. The likely range is $248,673 to $301,327. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 636 Walnut Ridge Dr, Ballwin, MO last sell?

636 Walnut Ridge Dr, Ballwin, MO last sold on Aug 1, 2025 for $256,690, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 636 Walnut Ridge Dr, Ballwin, MO?

636 Walnut Ridge Dr, Ballwin, MO has 2 bedrooms, 2.5 bathrooms, 1,424 square feet of living space and a 0.03-acre lot.

When was 636 Walnut Ridge Dr, Ballwin, MO built?

636 Walnut Ridge Dr, Ballwin, MO was built in 1979, making it 47 years old. It is a townhouse home. The building has 2 stories.

What schools serve 636 Walnut Ridge Dr, Ballwin, MO?

636 Walnut Ridge Dr, Ballwin, MO is assigned to Wren Hollow Elementary School (elementary), rated C-; Southwest Middle School (middle), rated C+; South High School (high), rated B+. All sit in Parkway School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 636 Walnut Ridge Dr, Ballwin, MO compare to other homes in Ballwin 63021?

Among the 19,790 homes in Ballwin 63021, it is worth more than 21% of them ($275,000 against a typical $364,556), its price per square foot is higher than 27% of them ($193 against a typical $214), it is bigger than 37% of them (1,424 ft² against a typical 1,674 ft²), its lot is bigger than 8% of them (1,424 ft² against a typical 0.21 ac) and it is newer than 46% of them (1979 against a typical 1983). Measured against all of St. Louis County, it is worth more than 50% 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 636 Walnut Ridge Dr, Ballwin, MO?

The 2024 property tax bill for 636 Walnut Ridge Dr, Ballwin, MO was $2,434. The county assessed it at $40,260.

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Assigned schools

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See this home in context

Open 636 Walnut Ridge Dron TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

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