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Single Family ResidenceResidential
$181,425$114 / 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 73How 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

306 S UNION ST

ROCK RAPIDS, IA 51246
1.5
Baths
1,596 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.
0.42 ac
Lot SizeThe size of the land the home sits on, from county records.
1930
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$181K
$132K low$231K 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.$181,425
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$145,140

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,364 (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.$129,340 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$33,680
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$95,660
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$113,380
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$129,340

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.0.41
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.Yes
CoolingThe type of cooling or air conditioning in the home.None
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.Porch · 276 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.

M
Central Lyon Secondary SchoolA+
Middle · Grades 7–12 · 0.7 mi
E
Central Lyon Elementary SchoolA
Elementary · Grades PK–6 · 0.7 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.Yes

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

306 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.

  • Worth less than 68% of homes in Lyon County
  • Costs less per square foot than 74% of homes in Rock Rapids 51246
  • Older than 67% 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
$73K$793K

This home is worth more than 33% 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$181,425
CheaperTypical $242,985Pricier

Pricier than 33% of homes nearby

Price per ft²$114
CheaperTypical $162Pricier

Pricier than 26% of homes nearby

Living area1,596 ft²
SmallerTypical 1,545 ft²Bigger

Bigger than 53% of homes nearby

Lot size0.42 ac
SmallerTypical 0.33 acBigger

Bigger than 59% of homes nearby

Year built1930
OlderTypical 1956Newer

Newer than 33% of homes nearby

How 306 S Union St ranks against every home in each area.
MeasureThis homeRock Rapids 51246Lyon County
Estimated valuepricier than$181,42533% of homes32% of homes
Price per ft²pricier than$11426% of homes26% of homes
Living areabigger than1,596 ft²53% of homes53% of homes
Lot sizebigger than0.42 ac59% of homes51% of homes
Year builtnewer than193033% of homes36% of homes

About 306 S Union St

How much is 306 S Union St, Rock Rapids, IA worth?

The TopHap Estimate for 306 S Union St, Rock Rapids, IA is $181,425 as of Jul 14, 2026. The likely range is $132,175 to $230,675. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 306 S Union St, Rock Rapids, IA last sell?

306 S Union St, Rock Rapids, IA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 306 S Union St, Rock Rapids, IA?

306 S Union St, Rock Rapids, IA has 1.5 bathrooms, 1,596 square feet of living space and a 0.41-acre lot.

When was 306 S Union St, Rock Rapids, IA built?

306 S Union St, Rock Rapids, IA was built in 1930, making it 96 years old. It is a conventional home. The building has 2 stories.

What schools serve 306 S Union St, Rock Rapids, IA?

306 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 306 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 33% of them ($181,425 against a typical $242,985), its price per square foot is higher than 26% of them ($114 against a typical $162), it is bigger than 53% of them (1,596 ft² against a typical 1,545 ft²), its lot is bigger than 59% of them (0.42 ac against a typical 0.33 ac) and it is newer than 33% of them (1930 against a typical 1956). Measured against all of Lyon County, it is worth more than 32% 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 306 S Union St, Rock Rapids, IA?

The 2025 property tax bill for 306 S Union St, Rock Rapids, IA was $1,364. The county assessed it at $129,340.

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Assigned schools

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See this home in context

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