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Single Family ResidenceResidential
$685,792$285 / 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 89How 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 $650,000 on Aug 17, 2021

4797 20TH AVE

NORWALK, IA 50211
4
Beds
5 / 2
Baths
2,409 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.
5.84 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.
2
StoriesHow many floors the home has above ground.
8
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

$686K
$607K low$765K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$650,000 · Aug 17, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,006 (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.$636,100 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$234,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$401,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$547,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$636,100

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.45 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 percent flood zone

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
CountyWarren
Lot (acres)The size of the land the home sits on, from county records.5.84
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 140 ft²Patio · 90 ft²Porch · 72 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.

E
Martensdale - St. Marys ElementaryA-
Elementary · Grades PK–6 · 5.8 mi
M
Martensdale - St. Marys Jr. / Sr. High SchoolB
Middle · Grades 7–12 · 5.8 mi

District: Martensdale-St. Marys Community School District

Neighborhood · ZIP 50211These 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.108
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.16

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.16,417
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.281 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,016
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,471
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

4797 20th Ave 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 96% of homes in Warren County
  • Costs more per square foot than 87% of homes in Warren County
  • Bigger than 89% of homes in Warren County
  • Has a bigger lot than 95% of homes in Norwalk 50211
  • Newer than 65% of homes in Warren County

What homes are worth in Norwalk 50211

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

This home
$173K$890K

This home is worth more than 95% of homes in Norwalk 50211.

How it measures up in Norwalk 50211

The dot is this home. The mark in the middle is the typical home in Norwalk 50211.

Estimated value$685,792
CheaperTypical $327,694Pricier

Pricier than 95% of homes nearby

Price per ft²$285
CheaperTypical $217Pricier

Pricier than 85% of homes nearby

Living area2,409 ft²
SmallerTypical 1,577 ft²Bigger

Bigger than 88% of homes nearby

Lot size5.84 ac
SmallerTypical 0.24 acBigger

Bigger than 95% of homes nearby

Year built2003
OlderTypical 2005Newer

Newer than 46% of homes nearby

How 4797 20th Ave ranks against every home in each area.
MeasureThis homeNorwalk 50211Warren County
Estimated valuepricier than$685,79295% of homes96% of homes
Price per ft²pricier than$28585% of homes87% of homes
Living areabigger than2,409 ft²88% of homes89% of homes
Lot sizebigger than5.84 ac95% of homes87% of homes
Year builtnewer than200346% of homes65% of homes

About 4797 20th Ave

How much is 4797 20th Ave, Norwalk, IA worth?

The TopHap Estimate for 4797 20th Ave, Norwalk, IA is $685,792 as of Sep 24, 2026. The likely range is $607,027 to $764,557. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4797 20th Ave, Norwalk, IA last sell?

4797 20th Ave, Norwalk, IA last sold on Aug 17, 2021 for $650,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4797 20th Ave, Norwalk, IA?

4797 20th Ave, Norwalk, IA has 4 bedrooms, 5 bathrooms, 2,409 square feet of living space and a 5.84-acre lot.

When was 4797 20th Ave, Norwalk, IA built?

4797 20th Ave, Norwalk, IA was built in 2003, making it 23 years old. The building has 2 stories.

What schools serve 4797 20th Ave, Norwalk, IA?

4797 20th Ave, Norwalk, IA is assigned to Martensdale - St. Marys Elementary (elementary), rated A-; Martensdale - St. Marys Jr. / Sr. High School (middle), rated B. All sit in Martensdale-St. Marys Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4797 20th Ave, Norwalk, IA compare to other homes in Norwalk 50211?

Among the 6,557 homes in Norwalk 50211, it is worth more than 95% of them ($685,792 against a typical $327,694), its price per square foot is higher than 85% of them ($285 against a typical $217), it is bigger than 88% of them (2,409 ft² against a typical 1,577 ft²), its lot is bigger than 95% of them (5.84 ac against a typical 0.24 ac) and it is newer than 46% of them (2003 against a typical 2005). Measured against all of Warren County, it is worth more than 96% 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 4797 20th Ave, Norwalk, IA?

The 2024 property tax bill for 4797 20th Ave, Norwalk, IA was $7,006. The county assessed it at $636,100.

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