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Single Family ResidenceResidential
$393,558$244 / 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 92How 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
Last sold for $379,000 on Oct 20, 2025

820 18TH AVE SE

ROCK VALLEY, IA 51247
2
Baths
1,616 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.
0.64 ac
Lot SizeThe size of the land the home sits on, from county records.
1974
Year BuiltThe year the home was originally built, according to county records.
7
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

$394K
$362K low$425K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$379,000 · Oct 20, 2025
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.$244,058
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$195,246
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.38%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$149,500
PEOPLES BANK · recorded Mar 4, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,000 (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.$359,590 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$33,610
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$325,980
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$311,740
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$359,590

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.Split Level
CountySIOUX
Lot (acres)The size of the land the home sits on, from county records.0.64
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
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
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 · 2,400 ft²Porch · 336 ft²

Transaction History(4)

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%

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.No

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

820 18th Ave Se 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 more than 78% of homes in Sioux County
  • Costs more per square foot than 75% of homes in Sioux County
  • Has a bigger lot than 69% of homes in Sioux County

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
$96K$658K

This home is worth more than 74% 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$393,558
CheaperTypical $282,167Pricier

Pricier than 74% of homes nearby

Price per ft²$244
CheaperTypical $192Pricier

Pricier than 74% of homes nearby

Living area1,616 ft²
SmallerTypical 1,502 ft²Bigger

Bigger than 59% of homes nearby

Lot size0.64 ac
SmallerTypical 0.36 acBigger

Bigger than 68% of homes nearby

Year built1974
OlderTypical 1974Newer

Newer than 50% of homes nearby

How 820 18th Ave Se ranks against every home in each area.
MeasureThis homeRock Valley 51247Sioux County
Estimated valuepricier than$393,55874% of homes78% of homes
Price per ft²pricier than$24474% of homes75% of homes
Living areabigger than1,616 ft²59% of homes59% of homes
Lot sizebigger than0.64 ac68% of homes69% of homes
Year builtnewer than197450% of homes56% of homes

About 820 18th Ave Se

How much is 820 18th Ave Se, Rock Valley, IA worth?

The TopHap Estimate for 820 18th Ave Se, Rock Valley, IA is $393,558 as of Jul 14, 2026. The likely range is $361,971 to $425,145. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 820 18th Ave Se, Rock Valley, IA last sell?

820 18th Ave Se, Rock Valley, IA last sold on Oct 20, 2025 for $379,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 820 18th Ave Se, Rock Valley, IA?

820 18th Ave Se, Rock Valley, IA has 2 bathrooms, 1,616 square feet of living space and a 0.64-acre lot.

When was 820 18th Ave Se, Rock Valley, IA built?

820 18th Ave Se, Rock Valley, IA was built in 1974, making it 52 years old. It is a split level home.

What schools serve 820 18th Ave Se, Rock Valley, IA?

820 18th Ave Se, 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 820 18th Ave Se, 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 74% of them ($393,558 against a typical $282,167), its price per square foot is higher than 74% of them ($244 against a typical $192), it is bigger than 59% of them (1,616 ft² against a typical 1,502 ft²), its lot is bigger than 68% of them (0.64 ac against a typical 0.36 ac) and it is newer than 50% of them (1974 against a typical 1974). Measured against all of Sioux County, it is worth more than 78% 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 820 18th Ave Se, Rock Valley, IA?

The 2025 property tax bill for 820 18th Ave Se, Rock Valley, IA was $5,000. The county assessed it at $359,590.

Closest homes

More homes in Rock Valley 51247

Assigned schools

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