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Single Family ResidenceResidential
$543,257$173 / 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

21324 STATE ROUTE AA

UNION STAR, MO 64494
2
Beds
1
Baths
3,133 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.
6.8 ac
Lot SizeThe size of the land the home sits on, from county records.
1901
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$543K
$513K low$573K 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.$543,257
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$434,606

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,962 (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.$57,030 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$55,130
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$50,530
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$301,010

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.6.80
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Stone (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Gas
GarageWhether the property has a garage, and details like whether it is attached to the home.Mixed

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 · 7.0 mi
E
King City Elementary SchoolA
Elementary · Grades PK–6 · 7.0 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

21324 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 74% of homes in Union Star 64494
  • Bigger than 94% of homes in Union Star 64494
  • Has a bigger lot than 74% of homes in Andrew County
  • Older than 88% 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$543,257
CheaperTypical $197,140Pricier

Pricier than 96% of homes nearby

Price per ft²$173
CheaperTypical $118Pricier

Pricier than 74% of homes nearby

Living area3,133 ft²
SmallerTypical 1,500 ft²Bigger

Bigger than 94% of homes nearby

Lot size6.8 ac
SmallerTypical 2.9 acBigger

Bigger than 63% of homes nearby

Year built1901
OlderTypical 1958Newer

Newer than 21% of homes nearby

How 21324 State Route Aa ranks against every home in each area.
MeasureThis homeUnion Star 64494Andrew County
Estimated valuepricier than$543,25796% of homes88% of homes
Price per ft²pricier than$17374% of homes74% of homes
Living areabigger than3,133 ft²94% of homes79% of homes
Lot sizebigger than6.8 ac63% of homes74% of homes
Year builtnewer than190121% of homes12% of homes

About 21324 State Route Aa

How much is 21324 State Route Aa, Union Star, MO worth?

The TopHap Estimate for 21324 State Route Aa, Union Star, MO is $543,257 as of Jul 14, 2026. The likely range is $513,369 to $573,145. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 21324 State Route Aa, Union Star, MO?

21324 State Route Aa, Union Star, MO has 2 bedrooms, 1 bathrooms, 3,133 square feet of living space and a 6.80-acre lot.

When was 21324 State Route Aa, Union Star, MO built?

21324 State Route Aa, Union Star, MO was built in 1901, making it 125 years old. The building has 2 stories.

What schools serve 21324 State Route Aa, Union Star, MO?

21324 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 21324 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 ($543,257 against a typical $197,140), its price per square foot is higher than 74% of them ($173 against a typical $118), it is bigger than 94% of them (3,133 ft² against a typical 1,500 ft²), its lot is bigger than 63% of them (6.8 ac against a typical 2.9 ac) and it is newer than 21% of them (1901 against a typical 1958). Measured against all of Andrew County, it is worth more than 88% 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 21324 State Route Aa, Union Star, MO?

The 2024 property tax bill for 21324 State Route Aa, Union Star, MO was $3,962. The county assessed it at $57,030.

Closest homes

More homes in Union Star 64494

Assigned schools

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