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Single Family ResidenceResidential
$234,647$105 / 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 $13,000 on Jan 26, 1990

309 S UNION ST

ROCK RAPIDS, IA 51246
4
Beds
3 / 1
Baths
2,244 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
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
$193K low$277K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$13,000 · Jan 26, 1990

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,518 (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.$187,890 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$19,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$168,390
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$175,260
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$187,890

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.0.21
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.Asphalt
HeatingThe type of heating system in the home.Forced Air
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, Detached
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 434 ft²Porch · 192 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 · 0.7 mi
E
Central Lyon Elementary SchoolA
Elementary · Grades PK–6 · 0.8 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

309 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 less per square foot than 73% of homes in Rock Rapids 51246
  • Bigger than 87% of homes in Rock Rapids 51246
  • Has a smaller lot than 84% of homes in Lyon County
  • Older than 75% 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
$67K$784K

This home is worth more than 52% 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$234,647
CheaperTypical $227,371Pricier

Pricier than 52% of homes nearby

Price per ft²$105
CheaperTypical $150Pricier

Pricier than 27% of homes nearby

Living area2,244 ft²
SmallerTypical 1,544 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.21 ac
SmallerTypical 0.33 acBigger

Bigger than 19% of homes nearby

Year built1920
OlderTypical 1956Newer

Newer than 25% of homes nearby

How 309 S Union St ranks against every home in each area.
MeasureThis homeRock Rapids 51246Lyon County
Estimated valuepricier than$234,64752% of homes56% of homes
Price per ft²pricier than$10527% of homes30% of homes
Living areabigger than2,244 ft²87% of homes87% of homes
Lot sizebigger than0.21 ac19% of homes16% of homes
Year builtnewer than192025% of homes28% of homes

About 309 S Union St

How much is 309 S Union St, Rock Rapids, IA worth?

The TopHap Estimate for 309 S Union St, Rock Rapids, IA is $234,647 as of Aug 30, 2026. The likely range is $192,566 to $276,728. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 S Union St, Rock Rapids, IA last sell?

309 S Union St, Rock Rapids, IA last sold on Jan 26, 1990 for $13,000, according to the county's recorded deed.

How big is 309 S Union St, Rock Rapids, IA?

309 S Union St, Rock Rapids, IA has 4 bedrooms, 3 bathrooms, 2,244 square feet of living space and a 0.21-acre lot.

When was 309 S Union St, Rock Rapids, IA built?

309 S Union St, Rock Rapids, IA was built in 1920, making it 106 years old. It is a conventional home. The building has 2 stories.

What schools serve 309 S Union St, Rock Rapids, IA?

309 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 309 S 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 52% of them ($234,647 against a typical $227,371), its price per square foot is higher than 27% of them ($105 against a typical $150), it is bigger than 87% of them (2,244 ft² against a typical 1,544 ft²), its lot is bigger than 19% of them (0.21 ac against a typical 0.33 ac) and it is newer than 25% of them (1920 against a typical 1956). Measured against all of Lyon County, it is worth more than 56% 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 309 S Union St, Rock Rapids, IA?

The 2024 property tax bill for 309 S Union St, Rock Rapids, IA was $2,518. The county assessed it at $187,890.

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