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Single Family ResidenceResidential
$98,000$128 / 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 89How 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

815 S 21ST ST

SAINT JOSEPH, MO 64507
0
Baths
768 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
1917
Year BuiltThe year the home was originally built, according to county records.

Valuation

$98K
$88K low$108K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$346 (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.$4,830 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$760
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,070
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$760
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$25,410

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.48
91
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
75
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
57
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
16
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.45 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%

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
CountyBUCHANAN
Lot (acres)The size of the land the home sits on, from county records.0.16
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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.

H
Central High SchoolC+
High · Grades 9–12 · 0.5 mi
E
Carden Park Elementary SchoolC-
Elementary · Grades KG–6 · 0.8 mi
M
Truman Middle SchoolD+
Middle · Grades 7–8 · 1.1 mi

District: St. Joseph School District

Neighborhood · ZIP 64507These 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.125
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.22

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
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.14,833
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.257 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$64,170
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$79,643
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.38 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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

815 S 21st St 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 less than 86% of homes in Saint Joseph 64507
  • Costs less per square foot than 65% of homes in Saint Joseph 64507
  • Smaller than 94% of homes in Buchanan County
  • Has a smaller lot than 67% of homes in Buchanan County
  • Older than 74% of homes in Buchanan County

What homes are worth in Saint Joseph 64507

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

This home
$58K$639K

This home is worth more than 14% of homes in Saint Joseph 64507.

How it measures up in Saint Joseph 64507

The dot is this home. The mark in the middle is the typical home in Saint Joseph 64507.

Estimated value$98,000
CheaperTypical $157,650Pricier

Pricier than 14% of homes nearby

Price per ft²$128
CheaperTypical $143Pricier

Pricier than 35% of homes nearby

Living area768 ft²
SmallerTypical 1,116 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.16 ac
SmallerTypical 0.17 acBigger

Bigger than 48% of homes nearby

Year built1917
OlderTypical 1932Newer

Newer than 31% of homes nearby

How 815 S 21st St ranks against every home in each area.
MeasureThis homeSaint Joseph 64507Buchanan County
Estimated valuepricier than$98,00014% of homes19% of homes
Price per ft²pricier than$12835% of homes36% of homes
Living areabigger than768 ft²8% of homes6% of homes
Lot sizebigger than0.16 ac48% of homes33% of homes
Year builtnewer than191731% of homes26% of homes

About 815 S 21st St

How much is 815 S 21st St, Saint Joseph, MO worth?

The TopHap Estimate for 815 S 21st St, Saint Joseph, MO is $98,000 as of Oct 21, 2026. The likely range is $87,535 to $108,465. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 815 S 21st St, Saint Joseph, MO last sell?

815 S 21st St, Saint Joseph, MO last sold on Apr 18, 2024, according to the county's recorded deed.

How big is 815 S 21st St, Saint Joseph, MO?

815 S 21st St, Saint Joseph, MO has 768 square feet of living space and a 0.16-acre lot.

When was 815 S 21st St, Saint Joseph, MO built?

815 S 21st St, Saint Joseph, MO was built in 1917, making it 109 years old.

What schools serve 815 S 21st St, Saint Joseph, MO?

815 S 21st St, Saint Joseph, MO is assigned to Central High School (high), rated C+; Carden Park Elementary School (elementary), rated C-; Truman Middle School (middle), rated D+. All sit in St. Joseph School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 815 S 21st St, Saint Joseph, MO compare to other homes in Saint Joseph 64507?

Among the 5,088 homes in Saint Joseph 64507, it is worth more than 14% of them ($98,000 against a typical $157,650), its price per square foot is higher than 35% of them ($128 against a typical $143), it is bigger than 8% of them (768 ft² against a typical 1,116 ft²), its lot is bigger than 48% of them (0.16 ac against a typical 0.17 ac) and it is newer than 31% of them (1917 against a typical 1932). Measured against all of Buchanan County, it is worth more than 19% 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 815 S 21st St, Saint Joseph, MO?

The 2025 property tax bill for 815 S 21st St, Saint Joseph, MO was $346. The county assessed it at $4,830.

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