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Rural ResidenceResidential
Last sold for $1,766,000 on Apr 14, 2026

4149 490TH ST

ALTON, IA 51003
2.5
Baths
1,352 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.
4.57 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
1
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,766,000 · Apr 14, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$486 (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.$115,530 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,850
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$107,680
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$57,150
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$115,530

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Rural Residence
CountySIOUX
Lot (acres)The size of the land the home sits on, from county records.4.57
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.Forced Air With Air Conditioning
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, 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 · 108 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.

Neighborhood · ZIP 51003These 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.117
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.18

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.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.2,164
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.39 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,017
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,952
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.28 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

4149 490th 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.

  • Smaller than 72% of homes in Alton 51003
  • Has a bigger lot than 86% of homes in Sioux County
  • Older than 97% of homes in Sioux County

How it measures up in Alton 51003

The dot is this home. The mark in the middle is the typical home in Alton 51003.

Living area1,352 ft²
SmallerTypical 1,627 ft²Bigger

Bigger than 28% of homes nearby

Lot size4.57 ac
SmallerTypical 0.4 acBigger

Bigger than 84% of homes nearby

Year built1890
OlderTypical 1956Newer

Newer than 6% of homes nearby

How 4149 490th St ranks against every home in each area.
MeasureThis homeAlton 51003Sioux County
Living areabigger than1,352 ft²28% of homes35% of homes
Lot sizebigger than4.57 ac84% of homes86% of homes
Year builtnewer than18906% of homes3% of homes

About 4149 490th St

When did 4149 490th St, Alton, IA last sell?

4149 490th St, Alton, IA last sold on Apr 14, 2026 for $1,766,000, according to the county's recorded deed.

How big is 4149 490th St, Alton, IA?

4149 490th St, Alton, IA has 2.5 bathrooms, 1,352 square feet of living space and a 4.57-acre lot.

When was 4149 490th St, Alton, IA built?

4149 490th St, Alton, IA was built in 1890, making it 136 years old. The building has 1 story.

How does 4149 490th St, Alton, IA compare to other homes in Alton 51003?

Among the 670 homes in Alton 51003, it is bigger than 28% of them (1,352 ft² against a typical 1,627 ft²), its lot is bigger than 84% of them (4.57 ac against a typical 0.4 ac) and it is newer than 6% of them (1890 against a typical 1956). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4149 490th St, Alton, IA?

The 2025 property tax bill for 4149 490th St, Alton, IA was $486. The county assessed it at $115,530.

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