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Single Family ResidenceResidential
$267,080$199 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $202,000 on Jun 29, 2021

1823 OLD STATE ROUTE 21

ARNOLD, MO 63010
2
Baths
1,344 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.
0.91 ac
Lot SizeThe size of the land the home sits on, from county records.
1960
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$267K
$256K low$279K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$202,000 · Jun 29, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,409 (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.$19,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$17,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$19,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$104,800

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
44
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
40
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
87
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
79
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
8
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.10 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
CountyJEFFERSON
Lot (acres)The size of the land the home sits on, from county records.0.91
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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, 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.Porch · 84 ft²

Transaction History(2)

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
Meramec Heights Elementary SchoolA-
Elementary · Grades KG–5 · 1.3 mi
M
Ridgewood Middle SchoolA
Middle · Grades 6–8 · 2.2 mi
H
Fox High SchoolB-
High · Grades 9–12 · 4.7 mi

District: Fox C-6 School District

Neighborhood · ZIP 63010These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.154

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.35,823
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,671 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$78,859
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,374
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.41 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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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

1823 Old State Route 21 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.

  • Costs less per square foot than 66% of homes in Arnold 63010
  • Has a bigger lot than 89% of homes in Arnold 63010
  • Older than 88% of homes in Arnold 63010

What homes are worth in Arnold 63010

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

This home
$169K$500K

This home is worth more than 53% of homes in Arnold 63010.

How it measures up in Arnold 63010

The dot is this home. The mark in the middle is the typical home in Arnold 63010.

Estimated value$267,080
CheaperTypical $262,305Pricier

Pricier than 53% of homes nearby

Price per ft²$199
CheaperTypical $217Pricier

Pricier than 34% of homes nearby

Living area1,344 ft²
SmallerTypical 1,222 ft²Bigger

Bigger than 62% of homes nearby

Lot size0.91 ac
SmallerTypical 0.25 acBigger

Bigger than 89% of homes nearby

Year built1960
OlderTypical 1984Newer

Newer than 12% of homes nearby

How 1823 Old State Route 21 ranks against every home in each area.
MeasureThis homeArnold 63010Jefferson County
Estimated valuepricier than$267,08053% of homes46% of homes
Price per ft²pricier than$19934% of homes44% of homes
Living areabigger than1,344 ft²62% of homes50% of homes
Lot sizebigger than0.91 ac89% of homes67% of homes
Year builtnewer than196012% of homes16% of homes

About 1823 Old State Route 21

How much is 1823 Old State Route 21, Arnold, MO worth?

The TopHap Estimate for 1823 Old State Route 21, Arnold, MO is $267,080 as of Oct 21, 2026. The likely range is $255,598 to $278,562. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1823 Old State Route 21, Arnold, MO last sell?

1823 Old State Route 21, Arnold, MO last sold on Jun 29, 2021 for $202,000, according to the county's recorded deed.

How big is 1823 Old State Route 21, Arnold, MO?

1823 Old State Route 21, Arnold, MO has 2 bathrooms, 1,344 square feet of living space and a 0.91-acre lot.

When was 1823 Old State Route 21, Arnold, MO built?

1823 Old State Route 21, Arnold, MO was built in 1960, making it 66 years old. The building has 1 story.

What schools serve 1823 Old State Route 21, Arnold, MO?

1823 Old State Route 21, Arnold, MO is assigned to Meramec Heights Elementary School (elementary), rated A-; Ridgewood Middle School (middle), rated A; Fox High School (high), rated B-. All sit in Fox C-6 School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1823 Old State Route 21, Arnold, MO compare to other homes in Arnold 63010?

Among the 12,298 homes in Arnold 63010, it is worth more than 53% of them ($267,080 against a typical $262,305), its price per square foot is higher than 34% of them ($199 against a typical $217), it is bigger than 62% of them (1,344 ft² against a typical 1,222 ft²), its lot is bigger than 89% of them (0.91 ac against a typical 0.25 ac) and it is newer than 12% of them (1960 against a typical 1984). Measured against all of Jefferson County, it is worth more than 46% 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 1823 Old State Route 21, Arnold, MO?

The 2025 property tax bill for 1823 Old State Route 21, Arnold, MO was $1,409. The county assessed it at $19,900.

More homes on Old State Route 21

Closest homes

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Assigned schools

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