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Single Family ResidenceResidential
$242,174$277 / 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 Aug 30, 2026

21 W PATTERSON ST

MASCOUTAH, IL 62258
2
Baths
874 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$242K
$228K low$257K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,384 (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.$66,654 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,299
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$59,355
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$61,958
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$199,962

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.46
40
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
14
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
83
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
69
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
24
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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
CountyST. CLAIR
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1975
Lot (acres)The size of the land the home sits on, from county records.0.24
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.No Foundation
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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.Deck · 336 ft²Porch · 78 ft²

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

E
Mascoutah Elementary SchoolA
Elementary · Grades PK–5 · 0.6 mi
M
Mascoutah Middle SchoolB-
Middle · Grades 6–8 · 0.6 mi
H
Mascoutah High SchoolA
High · Grades 9–12 · 1.1 mi

District: Mascoutah Community Unit School District 19

Neighborhood · ZIP 62258These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.91
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.171

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.93%
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.7.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.10,389
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.134 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$94,499
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,031
Average tempThe average temperature here across a full year.56°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.59%

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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

21 W Patterson 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 more than 66% of homes in St. Clair County
  • Costs more per square foot than 88% of homes in St. Clair County
  • Smaller than 86% of homes in Mascoutah 62258
  • Older than 95% of homes in St. Clair County

What homes are worth in Mascoutah 62258

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

This home
$78K$555K

This home is worth more than 47% of homes in Mascoutah 62258.

How it measures up in Mascoutah 62258

The dot is this home. The mark in the middle is the typical home in Mascoutah 62258.

Estimated value$242,174
CheaperTypical $250,636Pricier

Pricier than 47% of homes nearby

Price per ft²$277
CheaperTypical $185Pricier

Pricier than 87% of homes nearby

Living area874 ft²
SmallerTypical 1,320 ft²Bigger

Bigger than 14% of homes nearby

Lot size0.24 ac
SmallerTypical 0.25 acBigger

Bigger than 46% of homes nearby

Year built1900
OlderTypical 1983Newer

Newer than 9% of homes nearby

How 21 W Patterson St ranks against every home in each area.
MeasureThis homeMascoutah 62258St. Clair County
Estimated valuepricier than$242,17447% of homes66% of homes
Price per ft²pricier than$27787% of homes88% of homes
Living areabigger than874 ft²14% of homes17% of homes
Lot sizebigger than0.24 ac46% of homes46% of homes
Year builtnewer than19009% of homes5% of homes

About 21 W Patterson St

How much is 21 W Patterson St, Mascoutah, IL worth?

The TopHap Estimate for 21 W Patterson St, Mascoutah, IL is $242,174 as of Aug 30, 2026. The likely range is $227,781 to $256,567. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 W Patterson St, Mascoutah, IL last sell?

21 W Patterson St, Mascoutah, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 W Patterson St, Mascoutah, IL?

21 W Patterson St, Mascoutah, IL has 2 bathrooms, 874 square feet of living space and a 0.24-acre lot.

When was 21 W Patterson St, Mascoutah, IL built?

21 W Patterson St, Mascoutah, IL was built in 1900, making it 126 years old. The building has 1 story.

What schools serve 21 W Patterson St, Mascoutah, IL?

21 W Patterson St, Mascoutah, IL is assigned to Mascoutah Elementary School (elementary), rated A; Mascoutah Middle School (middle), rated B-; Mascoutah High School (high), rated A. All sit in Mascoutah Community Unit School District 19. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 W Patterson St, Mascoutah, IL compare to other homes in Mascoutah 62258?

Among the 3,992 homes in Mascoutah 62258, it is worth more than 47% of them ($242,174 against a typical $250,636), its price per square foot is higher than 87% of them ($277 against a typical $185), it is bigger than 14% of them (874 ft² against a typical 1,320 ft²), its lot is bigger than 46% of them (0.24 ac against a typical 0.25 ac) and it is newer than 9% of them (1900 against a typical 1983). Measured against all of St. Clair County, it is worth more than 66% 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 21 W Patterson St, Mascoutah, IL?

The 2025 property tax bill for 21 W Patterson St, Mascoutah, IL was $4,384. The county assessed it at $66,654.

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