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Single Family ResidenceResidential
$234,836$215 / 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 81How 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 $26,000 on Nov 4, 1988

509 S UNION ST

ROCK RAPIDS, IA 51246
2 / 1
Baths
1,092 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.
1954
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.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$235K
$191K low$279K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$26,000 · Nov 4, 1988
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.$234,836
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$187,869

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,830 (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.$145,270 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$24,380
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$120,890
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$130,220
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$145,270

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.Ranch
CountyLyon
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1960
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)
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.Forced Air
CoolingThe type of cooling or air conditioning in the home.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 · 116 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 · 0.6 mi
E
Central Lyon Elementary SchoolA
Elementary · Grades PK–6 · 0.6 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
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

509 S 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 71% of homes in Rock Rapids 51246
  • Smaller than 86% of homes in Lyon County
  • Has a smaller lot than 70% of homes in Lyon County

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
$73K$793K

This home is worth more than 48% 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$234,836
CheaperTypical $242,985Pricier

Pricier than 48% of homes nearby

Price per ft²$215
CheaperTypical $162Pricier

Pricier than 71% of homes nearby

Living area1,092 ft²
SmallerTypical 1,545 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.26 ac
SmallerTypical 0.33 acBigger

Bigger than 40% of homes nearby

Year built1954
OlderTypical 1956Newer

Newer than 48% of homes nearby

How 509 S Union St ranks against every home in each area.
MeasureThis homeRock Rapids 51246Lyon County
Estimated valuepricier than$234,83648% of homes46% of homes
Price per ft²pricier than$21571% of homes68% of homes
Living areabigger than1,092 ft²16% of homes14% of homes
Lot sizebigger than0.26 ac40% of homes30% of homes
Year builtnewer than195448% of homes48% of homes

About 509 S Union St

How much is 509 S Union St, Rock Rapids, IA worth?

The TopHap Estimate for 509 S Union St, Rock Rapids, IA is $234,836 as of Jul 14, 2026. The likely range is $190,842 to $278,830. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 S Union St, Rock Rapids, IA last sell?

509 S Union St, Rock Rapids, IA last sold on Nov 4, 1988 for $26,000, according to the county's recorded deed.

How big is 509 S Union St, Rock Rapids, IA?

509 S Union St, Rock Rapids, IA has 2 bathrooms, 1,092 square feet of living space and a 0.26-acre lot.

When was 509 S Union St, Rock Rapids, IA built?

509 S Union St, Rock Rapids, IA was built in 1954, making it 72 years old. It is a ranch home. The building has 1 story.

What schools serve 509 S Union St, Rock Rapids, IA?

509 S 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 509 S Union St, Rock Rapids, IA compare to other homes in Rock Rapids 51246?

Among the 1,469 homes in Rock Rapids 51246, it is worth more than 48% of them ($234,836 against a typical $242,985), its price per square foot is higher than 71% of them ($215 against a typical $162), it is bigger than 16% of them (1,092 ft² against a typical 1,545 ft²), its lot is bigger than 40% of them (0.26 ac against a typical 0.33 ac) and it is newer than 48% of them (1954 against a typical 1956). Measured against all of Lyon County, it is worth more than 46% 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 509 S Union St, Rock Rapids, IA?

The 2024 property tax bill for 509 S Union St, Rock Rapids, IA was $1,830. The county assessed it at $145,270.

More homes on S Union St

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Assigned schools

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