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Single Family ResidenceResidential
$80,401$141 / 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 78How 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

831 TONAWANDA ST

ROCKWELL CITY, IA 50579
2
Beds
1
Baths
570 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$80K
$63K low$98K high
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.$80,401
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$64,321

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$234 (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.$17,490 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,210
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$13,280
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$11,210
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$17,490

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.4 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
CountyCalhoun
Lot (acres)The size of the land the home sits on, from county records.0.16
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.None
CoolingThe type of cooling or air conditioning in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

M
South Central Calhoun Middle SchoolC-
Middle · Grades 4–8 · 0.3 mi
E
South Central Calhoun Elementary SchoolB
Elementary · Grades PK–3 · 0.9 mi
H
South Central Calhoun High SchoolB-
High · Grades 9–12 · 10.0 mi

District: South Central Calhoun Community School District

Neighborhood · ZIP 50579These 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.142
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.10

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.80%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.2,689
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.19 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$58,256
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$75,139
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.32 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.61%

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.No

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

831 Tonawanda 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 less than 86% of homes in Calhoun County
  • Among the smallest homes in Rockwell City 50579
  • Has a smaller lot than 88% of homes in Calhoun County

What homes are worth in Rockwell City 50579

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

This home
$48K$1.1M

This home is worth more than 17% of homes in Rockwell City 50579.

How it measures up in Rockwell City 50579

The dot is this home. The mark in the middle is the typical home in Rockwell City 50579.

Estimated value$80,401
CheaperTypical $154,916Pricier

Pricier than 17% of homes nearby

Price per ft²$141
CheaperTypical $107Pricier

Pricier than 64% of homes nearby

Living area570 ft²
SmallerTypical 1,456 ft²Bigger

Smaller than almost all homes nearby

Lot size0.16 ac
SmallerTypical 0.28 acBigger

Bigger than 18% of homes nearby

Year built1940
OlderTypical 1940Newer

Newer than 51% of homes nearby

How 831 Tonawanda St ranks against every home in each area.
MeasureThis homeRockwell City 50579Calhoun County
Estimated valuepricier than$80,40117% of homes14% of homes
Price per ft²pricier than$14164% of homes63% of homes
Living areabigger than570 ft²almost no homesalmost no homes
Lot sizebigger than0.16 ac18% of homes12% of homes
Year builtnewer than194051% of homes48% of homes

About 831 Tonawanda St

How much is 831 Tonawanda St, Rockwell City, IA worth?

The TopHap Estimate for 831 Tonawanda St, Rockwell City, IA is $80,401 as of Jul 14, 2026. The likely range is $63,074 to $97,728. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 831 Tonawanda St, Rockwell City, IA last sell?

831 Tonawanda St, Rockwell City, IA last sold on Nov 3, 2022, according to the county's recorded deed.

How big is 831 Tonawanda St, Rockwell City, IA?

831 Tonawanda St, Rockwell City, IA has 2 bedrooms, 1 bathrooms, 570 square feet of living space and a 0.16-acre lot.

When was 831 Tonawanda St, Rockwell City, IA built?

831 Tonawanda St, Rockwell City, IA was built in 1940, making it 86 years old. The building has 1 story.

What schools serve 831 Tonawanda St, Rockwell City, IA?

831 Tonawanda St, Rockwell City, IA is assigned to South Central Calhoun Middle School (middle), rated C-; South Central Calhoun Elementary School (elementary), rated B; South Central Calhoun High School (high), rated B-. All sit in South Central Calhoun Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 831 Tonawanda St, Rockwell City, IA compare to other homes in Rockwell City 50579?

Among the 1,243 homes in Rockwell City 50579, it is worth more than 17% of them ($80,401 against a typical $154,916), its price per square foot is higher than 64% of them ($141 against a typical $107), it is bigger than almost none of them (570 ft² against a typical 1,456 ft²), its lot is bigger than 18% of them (0.16 ac against a typical 0.28 ac) and it is newer than 51% of them (1940 against a typical 1940). Measured against all of Calhoun County, it is worth more than 14% 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 831 Tonawanda St, Rockwell City, IA?

The 2024 property tax bill for 831 Tonawanda St, Rockwell City, IA was $234. The county assessed it at $17,490.

Closest homes

More homes in Rockwell City 50579

Assigned schools

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