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Single Family ResidenceResidential
$299,461$211 / 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 83How 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 $155,000 on Apr 23, 2018

821 18TH PL

ROCK VALLEY, IA 51247
2 / 2
Baths
1,416 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1975
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$299K
$249K low$350K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$155,000 · Apr 23, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,496 (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.$233,210 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$24,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$208,710
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$204,420
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$233,210

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySIOUX
Lot (acres)The size of the land the home sits on, from county records.0.32
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, Attached
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.Patio · 115 ft²Porch · 252 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.

E
Rock Valley Elementary SchoolA
Elementary · Grades PK–5 · 0.8 mi
M
Rock Valley High SchoolA-
Middle · Grades 9–12 · 0.8 mi

District: Rock Valley Community School District

Neighborhood · ZIP 51247These 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.127
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
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.5,240
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.47 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,197
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,994
Average tempThe average temperature here across a full year.47°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

821 18th Pl 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.

What homes are worth in Rock Valley 51247

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

This home
$81K$641K

This home is worth more than 54% of homes in Rock Valley 51247.

How it measures up in Rock Valley 51247

The dot is this home. The mark in the middle is the typical home in Rock Valley 51247.

Estimated value$299,461
CheaperTypical $285,074Pricier

Pricier than 54% of homes nearby

Price per ft²$211
CheaperTypical $195Pricier

Pricier than 58% of homes nearby

Living area1,416 ft²
SmallerTypical 1,500 ft²Bigger

Bigger than 42% of homes nearby

Lot size0.32 ac
SmallerTypical 0.36 acBigger

Bigger than 43% of homes nearby

Year built1975
OlderTypical 1975Newer

Newer than 51% of homes nearby

How 821 18th Pl ranks against every home in each area.
MeasureThis homeRock Valley 51247Sioux County
Estimated valuepricier than$299,46154% of homes55% of homes
Price per ft²pricier than$21158% of homes60% of homes
Living areabigger than1,416 ft²42% of homes42% of homes
Lot sizebigger than0.32 ac43% of homes45% of homes
Year builtnewer than197551% of homes57% of homes

About 821 18th Pl

How much is 821 18th Pl, Rock Valley, IA worth?

The TopHap Estimate for 821 18th Pl, Rock Valley, IA is $299,461 as of Aug 30, 2026. The likely range is $249,253 to $349,669. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 821 18th Pl, Rock Valley, IA last sell?

821 18th Pl, Rock Valley, IA last sold on Apr 23, 2018 for $155,000, according to the county's recorded deed.

How big is 821 18th Pl, Rock Valley, IA?

821 18th Pl, Rock Valley, IA has 2 bathrooms, 1,416 square feet of living space and a 0.32-acre lot.

When was 821 18th Pl, Rock Valley, IA built?

821 18th Pl, Rock Valley, IA was built in 1975, making it 51 years old. The building has 1 story.

What schools serve 821 18th Pl, Rock Valley, IA?

821 18th Pl, Rock Valley, IA is assigned to Rock Valley Elementary School (elementary), rated A; Rock Valley High School (middle), rated A-. All sit in Rock Valley Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 821 18th Pl, Rock Valley, IA compare to other homes in Rock Valley 51247?

Among the 1,825 homes in Rock Valley 51247, it is worth more than 54% of them ($299,461 against a typical $285,074), its price per square foot is higher than 58% of them ($211 against a typical $195), it is bigger than 42% of them (1,416 ft² against a typical 1,500 ft²), its lot is bigger than 43% of them (0.32 ac against a typical 0.36 ac) and it is newer than 51% of them (1975 against a typical 1975). Measured against all of Sioux County, it is worth more than 55% 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 821 18th Pl, Rock Valley, IA?

The 2025 property tax bill for 821 18th Pl, Rock Valley, IA was $3,496. The county assessed it at $233,210.

More homes on 18th Pl

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