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Single Family ResidenceResidential
$257,607$248 / 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 Sep 24, 2026

12505 S KOSTNER AVE

ALSIP, IL 60803
3
Beds
1
Baths
1,040 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.
0.21 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

$258K
$246K low$269K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,197 (2023)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$19,000 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,999
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$14,001
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$18,999
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$190,000

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
16
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
72
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
75
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
40
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
StyleThe architectural style of the home, such as ranch or colonial.Bungalow
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.21
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.Raised (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.None
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached

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
Lane Elementary SchoolD+
Elementary · Grades KG–6 · 0.4 mi
M
Prairie Junior High SchoolC+
Middle · Grades 7–8 · 0.7 mi
H
Alan B. Shepard High SchoolC-
High · Grades 9–12 · 2.5 mi

District: Alsip-Hazelgreen-Oaklawn School District 126

Neighborhood · ZIP 60803These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.108
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.46

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.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.20,810
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,847 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$68,007
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$86,389
Average tempThe average temperature here across a full year.50°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.54%

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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

12505 S Kostner Ave 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 69% of homes in Cook County
  • Costs more per square foot than 67% of homes in Alsip 60803
  • Smaller than 83% of homes in Cook County
  • Has a bigger lot than 65% of homes in Cook County
  • Older than 70% of homes in Alsip 60803

What homes are worth in Alsip 60803

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

This home
$96K$441K

This home is worth more than 39% of homes in Alsip 60803.

How it measures up in Alsip 60803

The dot is this home. The mark in the middle is the typical home in Alsip 60803.

Estimated value$257,607
CheaperTypical $273,948Pricier

Pricier than 39% of homes nearby

Price per ft²$248
CheaperTypical $228Pricier

Pricier than 67% of homes nearby

Living area1,040 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 29% of homes nearby

Lot size0.21 ac
SmallerTypical 0.17 acBigger

Bigger than 60% of homes nearby

Year built1962
OlderTypical 1970Newer

Newer than 30% of homes nearby

How 12505 S Kostner Ave ranks against every home in each area.
MeasureThis homeAlsip 60803Cook County
Estimated valuepricier than$257,60739% of homes31% of homes
Price per ft²pricier than$24867% of homes49% of homes
Living areabigger than1,040 ft²29% of homes17% of homes
Lot sizebigger than0.21 ac60% of homes65% of homes
Year builtnewer than196230% of homes55% of homes

About 12505 S Kostner Ave

How much is 12505 S Kostner Ave, Alsip, IL worth?

The TopHap Estimate for 12505 S Kostner Ave, Alsip, IL is $257,607 as of Sep 24, 2026. The likely range is $246,097 to $269,117. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 12505 S Kostner Ave, Alsip, IL?

12505 S Kostner Ave, Alsip, IL has 3 bedrooms, 1 bathrooms, 1,040 square feet of living space and a 0.21-acre lot.

When was 12505 S Kostner Ave, Alsip, IL built?

12505 S Kostner Ave, Alsip, IL was built in 1962, making it 64 years old. It is a bungalow home. The building has 1 story.

What schools serve 12505 S Kostner Ave, Alsip, IL?

12505 S Kostner Ave, Alsip, IL is assigned to Lane Elementary School (elementary), rated D+; Prairie Junior High School (middle), rated C+; Alan B. Shepard High School (high), rated C-. All sit in Alsip-Hazelgreen-Oaklawn School District 126. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12505 S Kostner Ave, Alsip, IL compare to other homes in Alsip 60803?

Among the 6,840 homes in Alsip 60803, it is worth more than 39% of them ($257,607 against a typical $273,948), its price per square foot is higher than 67% of them ($248 against a typical $228), it is bigger than 29% of them (1,040 ft² against a typical 1,200 ft²), its lot is bigger than 60% of them (0.21 ac against a typical 0.17 ac) and it is newer than 30% of them (1962 against a typical 1970). Measured against all of Cook County, it is worth more than 31% 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 12505 S Kostner Ave, Alsip, IL?

The 2023 property tax bill for 12505 S Kostner Ave, Alsip, IL was $5,197. The county assessed it at $19,000.

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