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Single Family ResidenceResidential
$108,129$71 / 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 85How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $49,000 on Mar 20, 2020

4128 AMMANN LN

SAINT LOUIS, MO 63121
3
Beds
1.5
Baths
1,519 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.
3,868 ft²
Lot SizeThe size of the land the home sits on, from county records.
1963
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$108K
$92K low$124K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$49,000 · Mar 20, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,153 (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.$22,410 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,360
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$20,050
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$16,740
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$117,900

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
39
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
24
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
88
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
68
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
4
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.8 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.Conventional
CountyST. LOUIS
Lot (acres)The size of the land the home sits on, from county records.0.09
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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 · 172 ft²

Transaction History(8)

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.

E
Barack Obama SchoolF
Elementary · Grades 1–8 · 0.6 mi
H
Normandy High SchoolF
High · Grades 9–12 · 1.6 mi

District: Normandy School District

Neighborhood · ZIP 63121These 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.158
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.134

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.81%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.20%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.22,360
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,360 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$49,976
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$60,876
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

4128 Ammann Ln 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 87% of homes in St. Louis County
  • Costs less per square foot than 96% of homes in St. Louis County
  • Bigger than 89% of homes in Northwoods
  • Has a smaller lot than 91% of homes in Saint Louis 63121
  • Newer than 97% of homes in Northwoods

What homes are worth in Saint Louis 63121

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

This home
$32K$293K

This home is worth more than 67% of homes in Saint Louis 63121.

How it measures up in Saint Louis 63121

The dot is this home. The mark in the middle is the typical home in Saint Louis 63121.

Estimated value$108,129
CheaperTypical $87,159Pricier

Pricier than 67% of homes nearby

Price per ft²$71
CheaperTypical $82Pricier

Pricier than 32% of homes nearby

Living area1,519 ft²
SmallerTypical 1,075 ft²Bigger

Bigger than 80% of homes nearby

Lot size3,868 ft²
SmallerTypical 0.15 acBigger

Bigger than 9% of homes nearby

Year built1963
OlderTypical 1941Newer

Newer than 94% of homes nearby

How 4128 Ammann Ln ranks against every home in each area.
MeasureThis homeNorthwoodsSaint Louis 63121St. Louis County
Estimated valuepricier than$108,12963% of homes67% of homes13% of homes
Price per ft²pricier than$7113% of homes32% of homes4% of homes
Living areabigger than1,519 ft²89% of homes80% of homes53% of homes
Lot sizebigger than3,868 ft²14% of homes9% of homes9% of homes
Year builtnewer than196397% of homes94% of homes48% of homes

About 4128 Ammann Ln

How much is 4128 Ammann Ln, Saint Louis, MO worth?

The TopHap Estimate for 4128 Ammann Ln, Saint Louis, MO is $108,129 as of Oct 21, 2026. The likely range is $91,788 to $124,470. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4128 Ammann Ln, Saint Louis, MO last sell?

4128 Ammann Ln, Saint Louis, MO last sold on Mar 20, 2020 for $49,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 4128 Ammann Ln, Saint Louis, MO?

4128 Ammann Ln, Saint Louis, MO has 3 bedrooms, 1.5 bathrooms, 1,519 square feet of living space and a 0.09-acre lot.

When was 4128 Ammann Ln, Saint Louis, MO built?

4128 Ammann Ln, Saint Louis, MO was built in 1963, making it 63 years old. It is a conventional home. The building has 1 story.

What schools serve 4128 Ammann Ln, Saint Louis, MO?

4128 Ammann Ln, Saint Louis, MO is assigned to Barack Obama School (elementary), rated F; Normandy High School (high), rated F. All sit in Normandy School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4128 Ammann Ln, Saint Louis, MO compare to other homes in Saint Louis 63121?

Among the 9,375 homes in Saint Louis 63121, it is worth more than 67% of them ($108,129 against a typical $87,159), its price per square foot is higher than 32% of them ($71 against a typical $82), it is bigger than 80% of them (1,519 ft² against a typical 1,075 ft²), its lot is bigger than 9% of them (3,868 ft² against a typical 0.15 ac) and it is newer than 94% of them (1963 against a typical 1941). Measured against all of St. Louis County, it is worth more than 13% 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 4128 Ammann Ln, Saint Louis, MO?

The 2025 property tax bill for 4128 Ammann Ln, Saint Louis, MO was $2,153. The county assessed it at $22,410.

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