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Single Family ResidenceResidential
$526,414$170 / 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 95How 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

12551 S MASON AVE

ALSIP, IL 60803
5
Beds
4 / 1
Baths
3,103 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$526K
$499K low$554K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,261 (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.$40,083 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$8,448
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$31,635
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$40,082
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$400,830

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.
4
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.
74
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.Split Level
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.28
ConstructionThe main material the home's frame and walls are built from.Frame (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.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

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
Chippewa Elementary SchoolA
Elementary · Grades 1–3 · 0.1 mi
H
Alan B. Shepard High SchoolC-
High · Grades 9–12 · 0.8 mi
M
Independence Jr High SchoolA
Middle · Grades 6–8 · 0.9 mi

District: Palos Heights School District 128

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

12551 S Mason 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.

  • Among the most valuable homes in Alsip 60803
  • Costs less per square foot than 80% of homes in Cook County
  • Bigger than 97% of homes in Alsip 60803
  • Has a bigger lot than 72% of homes in Cook County
  • Newer than 72% of homes in Cook County

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
$100K$441K

This home is worth more than almost all 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$526,414
CheaperTypical $274,583Pricier

Pricier than almost all homes nearby

Price per ft²$170
CheaperTypical $228Pricier

Pricier than 21% of homes nearby

Living area3,103 ft²
SmallerTypical 1,200 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.28 ac
SmallerTypical 0.17 acBigger

Bigger than 69% of homes nearby

Year built1976
OlderTypical 1970Newer

Newer than 65% of homes nearby

How 12551 S Mason Ave ranks against every home in each area.
MeasureThis homeAlsip 60803Cook County
Estimated valuepricier than$526,414almost all homes79% of homes
Price per ft²pricier than$17021% of homes20% of homes
Living areabigger than3,103 ft²97% of homes90% of homes
Lot sizebigger than0.28 ac69% of homes72% of homes
Year builtnewer than197665% of homes72% of homes

About 12551 S Mason Ave

How much is 12551 S Mason Ave, Alsip, IL worth?

The TopHap Estimate for 12551 S Mason Ave, Alsip, IL is $526,414 as of Oct 21, 2026. The likely range is $499,017 to $553,811. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 12551 S Mason Ave, Alsip, IL?

12551 S Mason Ave, Alsip, IL has 5 bedrooms, 4 bathrooms, 3,103 square feet of living space and a 0.28-acre lot.

When was 12551 S Mason Ave, Alsip, IL built?

12551 S Mason Ave, Alsip, IL was built in 1976, making it 50 years old. It is a split level home. The building has 2 stories.

What schools serve 12551 S Mason Ave, Alsip, IL?

12551 S Mason Ave, Alsip, IL is assigned to Chippewa Elementary School (elementary), rated A; Alan B. Shepard High School (high), rated C-; Independence Jr High School (middle), rated A. All sit in Palos Heights School District 128. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12551 S Mason Ave, Alsip, IL compare to other homes in Alsip 60803?

Among the 6,878 homes in Alsip 60803, it is worth more than almost all of them ($526,414 against a typical $274,583), its price per square foot is higher than 21% of them ($170 against a typical $228), it is bigger than 97% of them (3,103 ft² against a typical 1,200 ft²), its lot is bigger than 69% of them (0.28 ac against a typical 0.17 ac) and it is newer than 65% of them (1976 against a typical 1970). Measured against all of Cook County, it is worth more than 79% 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 12551 S Mason Ave, Alsip, IL?

The 2023 property tax bill for 12551 S Mason Ave, Alsip, IL was $10,261. The county assessed it at $40,083.

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Assigned schools

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