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Single Family ResidenceResidential
$224,730$273 / 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 82How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $21,000 on Feb 27, 2002

400 N UNION ST

ROCK RAPIDS, IA 51246
1
Baths
824 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.
1 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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

$225K
$185K low$265K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$21,000 · Feb 27, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$432 (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.$42,680 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$9,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$33,680
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$38,560
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$42,680

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

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
CountyLyon
Lot (acres)The size of the land the home sits on, from county records.1.00
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.Block (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 40 ft²

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

M
Central Lyon Secondary SchoolA+
Middle · Grades 7–12 · 1.0 mi
E
Central Lyon Elementary SchoolA
Elementary · Grades PK–6 · 1.1 mi

District: Central Lyon Community School District

Neighborhood · ZIP 51246These 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.125
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.19

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.1%
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.4,544
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.28 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$73,023
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,712
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.27 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

400 N Union 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.

  • Costs more per square foot than 90% of homes in Lyon County
  • Smaller than 97% of homes in Lyon County
  • Has a bigger lot than 70% of homes in Rock Rapids 51246

What homes are worth in Rock Rapids 51246

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

This home
$66K$770K

This home is worth more than 50% of homes in Rock Rapids 51246.

How it measures up in Rock Rapids 51246

The dot is this home. The mark in the middle is the typical home in Rock Rapids 51246.

Estimated value$224,730
CheaperTypical $225,430Pricier

Pricier than 50% of homes nearby

Price per ft²$273
CheaperTypical $150Pricier

Pricier than 88% of homes nearby

Living area824 ft²
SmallerTypical 1,542 ft²Bigger

Bigger than 4% of homes nearby

Lot size1 ac
SmallerTypical 0.33 acBigger

Bigger than 70% of homes nearby

Year built1950
OlderTypical 1956Newer

Newer than 44% of homes nearby

How 400 N Union St ranks against every home in each area.
MeasureThis homeRock Rapids 51246Lyon County
Estimated valuepricier than$224,73050% of homes54% of homes
Price per ft²pricier than$27388% of homes90% of homes
Living areabigger than824 ft²4% of homes3% of homes
Lot sizebigger than1 ac70% of homes63% of homes
Year builtnewer than195044% of homes46% of homes

About 400 N Union St

How much is 400 N Union St, Rock Rapids, IA worth?

The TopHap Estimate for 400 N Union St, Rock Rapids, IA is $224,730 as of Aug 30, 2026. The likely range is $184,532 to $264,928. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 400 N Union St, Rock Rapids, IA last sell?

400 N Union St, Rock Rapids, IA last sold on Feb 27, 2002 for $21,000, according to the county's recorded deed.

How big is 400 N Union St, Rock Rapids, IA?

400 N Union St, Rock Rapids, IA has 1 bathrooms, 824 square feet of living space and a 1.00-acre lot.

When was 400 N Union St, Rock Rapids, IA built?

400 N Union St, Rock Rapids, IA was built in 1950, making it 76 years old. It is a conventional home. The building has 1 story.

What schools serve 400 N Union St, Rock Rapids, IA?

400 N Union St, Rock Rapids, IA is assigned to Central Lyon Secondary School (middle), rated A+; Central Lyon Elementary School (elementary), rated A. All sit in Central Lyon Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 400 N Union St, Rock Rapids, IA compare to other homes in Rock Rapids 51246?

Among the 1,470 homes in Rock Rapids 51246, it is worth more than 50% of them ($224,730 against a typical $225,430), its price per square foot is higher than 88% of them ($273 against a typical $150), it is bigger than 4% of them (824 ft² against a typical 1,542 ft²), its lot is bigger than 70% of them (1 ac against a typical 0.33 ac) and it is newer than 44% of them (1950 against a typical 1956). Measured against all of Lyon County, it is worth more than 54% 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 400 N Union St, Rock Rapids, IA?

The 2024 property tax bill for 400 N Union St, Rock Rapids, IA was $432. The county assessed it at $42,680.

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