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Single Family ResidenceResidential
$80,573$55 / 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 69How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $36,500 on Jan 21, 2015

504 W UNION ST

AVOCA, IA 51521
4
Beds
2
Baths
1,456 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$81K
$56K low$105K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$36,500 · Jan 21, 2015

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,316 (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.$83,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$20,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$62,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$79,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$83,700

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.51
72
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
71
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
55
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.27 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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
CountyPottawattamie
Lot (acres)The size of the land the home sits on, from county records.0.28
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Pier/Post & Beam
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.None
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.Shed · 120 ft²Patio · 288 ft²

Transaction History(3)

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
AHSTW Intermediate SchoolB+
Middle · Grades 4–8 · 0.1 mi
H
AHSTW High SchoolA-
High · Grades 9–12 · 0.1 mi
E
AHSTW Primary SchoolB-
Elementary · Grades PK–3 · 0.1 mi

District: Ahstw Community School District

Neighborhood · ZIP 51521These 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.135
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.15

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.2,321
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.27 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$72,641
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,943
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

504 W 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 97% of homes in Pottawattamie County
  • Among the lowest price per square foot in Pottawattamie County
  • Bigger than 78% of homes in Pottawattamie County
  • Newer than 83% of homes in Avoca 51521

What homes are worth in Avoca 51521

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

This home
$55K$525K

This home is worth more than 9% of homes in Avoca 51521.

How it measures up in Avoca 51521

The dot is this home. The mark in the middle is the typical home in Avoca 51521.

Estimated value$80,573
CheaperTypical $190,106Pricier

Pricier than 9% of homes nearby

Price per ft²$55
CheaperTypical $163Pricier

Pricier than 2% of homes nearby

Living area1,456 ft²
SmallerTypical 1,247 ft²Bigger

Bigger than 69% of homes nearby

Lot size0.28 ac
SmallerTypical 0.32 acBigger

Bigger than 46% of homes nearby

Year built1999
OlderTypical 1943Newer

Newer than 83% of homes nearby

How 504 W Union St ranks against every home in each area.
MeasureThis homeAvoca 51521Pottawattamie County
Estimated valuepricier than$80,5739% of homes3% of homes
Price per ft²pricier than$552% of homesalmost no homes
Living areabigger than1,456 ft²69% of homes78% of homes
Lot sizebigger than0.28 ac46% of homes63% of homes
Year builtnewer than199983% of homes83% of homes

About 504 W Union St

How much is 504 W Union St, Avoca, IA worth?

The TopHap Estimate for 504 W Union St, Avoca, IA is $80,573 as of Sep 24, 2026. The likely range is $55,813 to $105,333. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 504 W Union St, Avoca, IA last sell?

504 W Union St, Avoca, IA last sold on Jan 21, 2015 for $36,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 504 W Union St, Avoca, IA?

504 W Union St, Avoca, IA has 4 bedrooms, 2 bathrooms, 1,456 square feet of living space and a 0.28-acre lot.

When was 504 W Union St, Avoca, IA built?

504 W Union St, Avoca, IA was built in 1999, making it 27 years old. The building has 1 story.

What schools serve 504 W Union St, Avoca, IA?

504 W Union St, Avoca, IA is assigned to AHSTW Intermediate School (middle), rated B+; AHSTW High School (high), rated A-; AHSTW Primary School (elementary), rated B-. All sit in Ahstw Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 504 W Union St, Avoca, IA compare to other homes in Avoca 51521?

Among the 1,036 homes in Avoca 51521, it is worth more than 9% of them ($80,573 against a typical $190,106), its price per square foot is higher than 2% of them ($55 against a typical $163), it is bigger than 69% of them (1,456 ft² against a typical 1,247 ft²), its lot is bigger than 46% of them (0.28 ac against a typical 0.32 ac) and it is newer than 83% of them (1999 against a typical 1943). Measured against all of Pottawattamie County, it is worth more than 3% 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 504 W Union St, Avoca, IA?

The 2024 property tax bill for 504 W Union St, Avoca, IA was $1,316. The county assessed it at $83,700.

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