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Single Family ResidenceResidential
$184,962$151 / 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 93How 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

21 ALTA ST

GLEN CARBON, IL 62034
3
Beds
1
Baths
1,222 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1962
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$185K
$172K low$198K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,810 (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.$54,650 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$5,790
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$48,860
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$51,160
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$163,950

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.38
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
31
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.
67
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.

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
CountyMADISON
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.1970
Lot (acres)The size of the land the home sits on, from county records.0.22
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Glen Carbon Elementary School
Elementary · Grades KG–2 · 1.1 mi
M
Liberty Middle SchoolB+
Middle · Grades 6–8 · 3.0 mi
H
Edwardsville High SchoolA-
High · Grades 9–12 · 3.1 mi

District: Edwardsville Community Unit School District 7

Neighborhood · ZIP 62034These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.145

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.6%
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.16,797
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,070 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$103,081
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,546
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.40 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 Alta 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 91% of homes in Glen Carbon 62034
  • Costs less per square foot than 92% of homes in Glen Carbon 62034
  • Has a smaller lot than 76% of homes in Glen Carbon 62034
  • Older than 90% of homes in Glen Carbon 62034

What homes are worth in Glen Carbon 62034

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

This home
$101K$651K

This home is worth more than 9% of homes in Glen Carbon 62034.

How it measures up in Glen Carbon 62034

The dot is this home. The mark in the middle is the typical home in Glen Carbon 62034.

Estimated value$184,962
CheaperTypical $327,296Pricier

Pricier than 9% of homes nearby

Price per ft²$151
CheaperTypical $236Pricier

Pricier than 8% of homes nearby

Living area1,222 ft²
SmallerTypical 1,290 ft²Bigger

Bigger than 43% of homes nearby

Lot size0.22 ac
SmallerTypical 0.29 acBigger

Bigger than 24% of homes nearby

Year built1962
OlderTypical 1990Newer

Newer than 10% of homes nearby

How 21 Alta St ranks against every home in each area.
MeasureThis homeGlen Carbon 62034Madison County
Estimated valuepricier than$184,9629% of homes48% of homes
Price per ft²pricier than$1518% of homes43% of homes
Living areabigger than1,222 ft²43% of homes59% of homes
Lot sizebigger than0.22 ac24% of homes40% of homes
Year builtnewer than196210% of homes48% of homes

About 21 Alta St

How much is 21 Alta St, Glen Carbon, IL worth?

The TopHap Estimate for 21 Alta St, Glen Carbon, IL is $184,962 as of Oct 21, 2026. The likely range is $171,991 to $197,933. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Alta St, Glen Carbon, IL last sell?

21 Alta St, Glen Carbon, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Alta St, Glen Carbon, IL?

21 Alta St, Glen Carbon, IL has 3 bedrooms, 1 bathrooms, 1,222 square feet of living space and a 0.22-acre lot.

When was 21 Alta St, Glen Carbon, IL built?

21 Alta St, Glen Carbon, IL was built in 1962, making it 64 years old. The building has 1 story.

What schools serve 21 Alta St, Glen Carbon, IL?

21 Alta St, Glen Carbon, IL is assigned to Glen Carbon Elementary School (elementary); Liberty Middle School (middle), rated B+; Edwardsville High School (high), rated A-. All sit in Edwardsville Community Unit School District 7. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Alta St, Glen Carbon, IL compare to other homes in Glen Carbon 62034?

Among the 5,135 homes in Glen Carbon 62034, it is worth more than 9% of them ($184,962 against a typical $327,296), its price per square foot is higher than 8% of them ($151 against a typical $236), it is bigger than 43% of them (1,222 ft² against a typical 1,290 ft²), its lot is bigger than 24% of them (0.22 ac against a typical 0.29 ac) and it is newer than 10% of them (1962 against a typical 1990). Measured against all of Madison County, it is worth more than 48% 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 Alta St, Glen Carbon, IL?

The 2025 property tax bill for 21 Alta St, Glen Carbon, IL was $3,810. The county assessed it at $54,650.

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