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Single Family ResidenceResidential
$358,570$194 / 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 95How 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 $250,000 on Sep 24, 2018

4242 ROBERT KOCH HOSPITAL RD

SAINT LOUIS, MO 63129
2
Beds
2
Baths
1,848 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.
0.5 ac
Lot SizeThe size of the land the home sits on, from county records.
1952
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$359K
$341K low$376K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$250,000 · Sep 24, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,974 (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.$63,650 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$22,720
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,930
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$68,620
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$335,000

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.47
50
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
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.
78
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.14 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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyST. LOUIS
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2016
Lot (acres)The size of the land the home sits on, from county records.0.50
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.Yes
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, Detached
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 · 400 ft²Porch · 12 ft²

Transaction History(4)

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
Oakville High SchoolA
High · Grades 9–12 · 1.6 mi
M
Bernard Middle SchoolA-
Middle · Grades 6–8 · 1.8 mi
E
Wohlwend Elementary SchoolB-
Elementary · Grades KG–5 · 1.8 mi

District: Mehlville R-Ix School District

Neighborhood · ZIP 63129These 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.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.150

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.5.8%
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.53,709
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,289 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$94,462
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,578
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.41 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

4242 Robert Koch Hospital Rd 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 88% of homes in Mehlville
  • Bigger than 85% of homes in Mehlville
  • Has a bigger lot than 94% of homes in Mehlville
  • Older than 97% of homes in Saint Louis 63129

What homes are worth in Saint Louis 63129

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

This home
$121K$699K

This home is worth more than 61% of homes in Saint Louis 63129.

How it measures up in Saint Louis 63129

The dot is this home. The mark in the middle is the typical home in Saint Louis 63129.

Estimated value$358,570
CheaperTypical $328,259Pricier

Pricier than 61% of homes nearby

Price per ft²$194
CheaperTypical $186Pricier

Pricier than 58% of homes nearby

Living area1,848 ft²
SmallerTypical 1,744 ft²Bigger

Bigger than 55% of homes nearby

Lot size0.5 ac
SmallerTypical 0.23 acBigger

Bigger than 92% of homes nearby

Year built1952
OlderTypical 1982Newer

Newer than 3% of homes nearby

How 4242 Robert Koch Hospital Rd ranks against every home in each area.
MeasureThis homeMehlvilleSaint Louis 63129St. Louis County
Estimated valuepricier than$358,57088% of homes61% of homes65% of homes
Price per ft²pricier than$19453% of homes58% of homes56% of homes
Living areabigger than1,848 ft²85% of homes55% of homes66% of homes
Lot sizebigger than0.5 ac94% of homes92% of homes89% of homes
Year builtnewer than195210% of homes3% of homes26% of homes

About 4242 Robert Koch Hospital Rd

How much is 4242 Robert Koch Hospital Rd, Saint Louis, MO worth?

The TopHap Estimate for 4242 Robert Koch Hospital Rd, Saint Louis, MO is $358,570 as of Sep 24, 2026. The likely range is $341,462 to $375,678. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4242 Robert Koch Hospital Rd, Saint Louis, MO last sell?

4242 Robert Koch Hospital Rd, Saint Louis, MO last sold on Sep 24, 2018 for $250,000, according to the county's recorded deed.

How big is 4242 Robert Koch Hospital Rd, Saint Louis, MO?

4242 Robert Koch Hospital Rd, Saint Louis, MO has 2 bedrooms, 2 bathrooms, 1,848 square feet of living space and a 0.50-acre lot.

When was 4242 Robert Koch Hospital Rd, Saint Louis, MO built?

4242 Robert Koch Hospital Rd, Saint Louis, MO was built in 1952, making it 74 years old. It is a ranch home. The building has 1 story.

What schools serve 4242 Robert Koch Hospital Rd, Saint Louis, MO?

4242 Robert Koch Hospital Rd, Saint Louis, MO is assigned to Oakville High School (high), rated A; Bernard Middle School (middle), rated A-; Wohlwend Elementary School (elementary), rated B-. All sit in Mehlville R-Ix School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4242 Robert Koch Hospital Rd, Saint Louis, MO compare to other homes in Saint Louis 63129?

Among the 18,753 homes in Saint Louis 63129, it is worth more than 61% of them ($358,570 against a typical $328,259), its price per square foot is higher than 58% of them ($194 against a typical $186), it is bigger than 55% of them (1,848 ft² against a typical 1,744 ft²), its lot is bigger than 92% of them (0.5 ac against a typical 0.23 ac) and it is newer than 3% of them (1952 against a typical 1982). Measured against all of St. Louis 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 4242 Robert Koch Hospital Rd, Saint Louis, MO?

The 2025 property tax bill for 4242 Robert Koch Hospital Rd, Saint Louis, MO was $3,974. The county assessed it at $63,650.

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