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Single Family ResidenceResidential
$237,985$159 / 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 86How 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 $155,000 on Aug 16, 2022

521 E MARK ST

SHELL ROCK, IA 50670
3
Beds
1 / 1
Baths
1,500 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.
0.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$238K
$204K low$272K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$155,000 · Aug 16, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,674 (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.$157,130 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$18,560
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$138,570
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$150,180
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$157,130

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.38
39
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
14
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
68
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
61
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
12
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.Single Family Residence
CountyBUTLER
Lot (acres)The size of the land the home sits on, from county records.0.26
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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.DeckPatio · 396 ft²

Transaction History(1)

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
Shell Rock Elementary SchoolA
Elementary · Grades PK–4 · 0.4 mi
M
Waverly-Shell Rock Middle SchoolB+
Middle · Grades 5–8 · 4.1 mi
H
Waverly-Shell Rock Senior High SchoolA+
High · Grades 9–12 · 4.3 mi

District: Waverly-Shell Rock Community School District

Neighborhood · ZIP 50670These 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.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.11

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.1,981
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.35 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$80,862
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$91,558
Average tempThe average temperature here across a full year.47°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.61%

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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

521 E Mark St 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 71% of homes in Butler County
  • Costs more per square foot than 70% of homes in Butler County
  • Has a smaller lot than 77% of homes in Shell Rock 50670
  • Newer than 71% of homes in Butler County

What homes are worth in Shell Rock 50670

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

This home
$67K$615K

This home is worth more than 47% of homes in Shell Rock 50670.

How it measures up in Shell Rock 50670

The dot is this home. The mark in the middle is the typical home in Shell Rock 50670.

Estimated value$237,985
CheaperTypical $250,271Pricier

Pricier than 47% of homes nearby

Price per ft²$159
CheaperTypical $182Pricier

Pricier than 36% of homes nearby

Living area1,500 ft²
SmallerTypical 1,428 ft²Bigger

Bigger than 57% of homes nearby

Lot size0.26 ac
SmallerTypical 0.46 acBigger

Bigger than 23% of homes nearby

Year built1976
OlderTypical 1967Newer

Newer than 64% of homes nearby

How 521 E Mark St ranks against every home in each area.
MeasureThis homeShell Rock 50670Butler County
Estimated valuepricier than$237,98547% of homes71% of homes
Price per ft²pricier than$15936% of homes70% of homes
Living areabigger than1,500 ft²57% of homes51% of homes
Lot sizebigger than0.26 ac23% of homes33% of homes
Year builtnewer than197664% of homes71% of homes

About 521 E Mark St

How much is 521 E Mark St, Shell Rock, IA worth?

The TopHap Estimate for 521 E Mark St, Shell Rock, IA is $237,985 as of Jul 14, 2026. The likely range is $203,627 to $272,343. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 E Mark St, Shell Rock, IA last sell?

521 E Mark St, Shell Rock, IA last sold on Aug 16, 2022 for $155,000, according to the county's recorded deed.

How big is 521 E Mark St, Shell Rock, IA?

521 E Mark St, Shell Rock, IA has 3 bedrooms, 1 bathrooms, 1,500 square feet of living space and a 0.26-acre lot.

When was 521 E Mark St, Shell Rock, IA built?

521 E Mark St, Shell Rock, IA was built in 1976, making it 50 years old. The building has 1 story.

What schools serve 521 E Mark St, Shell Rock, IA?

521 E Mark St, Shell Rock, IA is assigned to Shell Rock Elementary School (elementary), rated A; Waverly-Shell Rock Middle School (middle), rated B+; Waverly-Shell Rock Senior High School (high), rated A+. All sit in Waverly-Shell Rock Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 E Mark St, Shell Rock, IA compare to other homes in Shell Rock 50670?

Among the 878 homes in Shell Rock 50670, it is worth more than 47% of them ($237,985 against a typical $250,271), its price per square foot is higher than 36% of them ($159 against a typical $182), it is bigger than 57% of them (1,500 ft² against a typical 1,428 ft²), its lot is bigger than 23% of them (0.26 ac against a typical 0.46 ac) and it is newer than 64% of them (1976 against a typical 1967). Measured against all of Butler County, it is worth more than 71% 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 521 E Mark St, Shell Rock, IA?

The 2025 property tax bill for 521 E Mark St, Shell Rock, IA was $2,674. The county assessed it at $157,130.

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