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Single Family ResidenceResidential
$554,486$236 / 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 94How 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

21023 STATE ROUTE AA

UNION STAR, MO 64494
1
Baths
2,346 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.
67.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1880
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
5
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$554K
$521K low$588K 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.$554,486
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$443,589

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,935 (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.$42,250 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$6,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$35,350
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$38,230
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$236,890

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.minimal

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
CountyAndrew
Lot (acres)The size of the land the home sits on, from county records.67.10
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Gravity
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 144 ft²Porch · 928 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
King City High SchoolC
Middle · Grades 7–12 · 7.1 mi
E
King City Elementary SchoolA
Elementary · Grades PK–6 · 7.1 mi

District: King City R-I School District

Neighborhood · ZIP 64494These 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.148
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.124
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.20

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.90%
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.8.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.666
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.11 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$66,989
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$77,266
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.37 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

21023 State Route Aa 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 96% of homes in Union Star 64494
  • Costs more per square foot than 93% of homes in Andrew County
  • Bigger than 83% of homes in Union Star 64494
  • Has a bigger lot than 90% of homes in Andrew County
  • Older than 97% of homes in Andrew County

What homes are worth in Union Star 64494

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

This home
$56K$665K

This home is worth more than 96% of homes in Union Star 64494.

How it measures up in Union Star 64494

The dot is this home. The mark in the middle is the typical home in Union Star 64494.

Estimated value$554,486
CheaperTypical $197,140Pricier

Pricier than 96% of homes nearby

Price per ft²$236
CheaperTypical $118Pricier

Pricier than 89% of homes nearby

Living area2,346 ft²
SmallerTypical 1,500 ft²Bigger

Bigger than 83% of homes nearby

Lot size67.1 ac
SmallerTypical 2.9 acBigger

Bigger than 85% of homes nearby

Year built1880
OlderTypical 1958Newer

Newer than 4% of homes nearby

How 21023 State Route Aa ranks against every home in each area.
MeasureThis homeUnion Star 64494Andrew County
Estimated valuepricier than$554,48696% of homes89% of homes
Price per ft²pricier than$23689% of homes93% of homes
Living areabigger than2,346 ft²83% of homes61% of homes
Lot sizebigger than67.1 ac85% of homes90% of homes
Year builtnewer than18804% of homes3% of homes

About 21023 State Route Aa

How much is 21023 State Route Aa, Union Star, MO worth?

The TopHap Estimate for 21023 State Route Aa, Union Star, MO is $554,486 as of Jul 14, 2026. The likely range is $520,813 to $588,159. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21023 State Route Aa, Union Star, MO last sell?

21023 State Route Aa, Union Star, MO last sold on Oct 16, 2012, according to the county's recorded deed.

How big is 21023 State Route Aa, Union Star, MO?

21023 State Route Aa, Union Star, MO has 1 bathrooms, 2,346 square feet of living space and a 67.10-acre lot.

When was 21023 State Route Aa, Union Star, MO built?

21023 State Route Aa, Union Star, MO was built in 1880, making it 146 years old. The building has 2 stories.

What schools serve 21023 State Route Aa, Union Star, MO?

21023 State Route Aa, Union Star, MO is assigned to King City High School (middle), rated C; King City Elementary School (elementary), rated A. All sit in King City R-I School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21023 State Route Aa, Union Star, MO compare to other homes in Union Star 64494?

Among the 448 homes in Union Star 64494, it is worth more than 96% of them ($554,486 against a typical $197,140), its price per square foot is higher than 89% of them ($236 against a typical $118), it is bigger than 83% of them (2,346 ft² against a typical 1,500 ft²), its lot is bigger than 85% of them (67.1 ac against a typical 2.9 ac) and it is newer than 4% of them (1880 against a typical 1958). Measured against all of Andrew County, it is worth more than 89% 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 21023 State Route Aa, Union Star, MO?

The 2024 property tax bill for 21023 State Route Aa, Union Star, MO was $2,935. The county assessed it at $42,250.

Closest homes

More homes in Union Star 64494

Assigned schools

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