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Single Family ResidenceResidential
$98,787$117 / 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 92How 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
Last sold for $206,000 on Aug 1, 2004

3620 BLACKSTONE AVE

MARKHAM, IL 60428
2
Beds
1
Baths
843 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.
0.41 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
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

$99K
$91K low$107K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$206,000 · Aug 1, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,862 (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.$10,000 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$3,977
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$6,023
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$9,999
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$100,000

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
10
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.
72
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
78
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.7 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%

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
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.41
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(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.

Foreclosure Filings(1)

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

E
Markham Park Elementary SchoolD
Elementary · Grades PK–5 · 0.2 mi
M
Prairie-Hills Junior High SchoolD+
Middle · Grades 6–8 · 0.9 mi
H
Tinley Park High SchoolA
High · Grades 9–12 · 3.6 mi

District: Prairie-Hills Elementary School District 144

Neighborhood · ZIP 60428These 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.78
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 100.43

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.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
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.12,305
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,123 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$58,165
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,508
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

3620 Blackstone 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 98% of homes in Cook County
  • Costs less per square foot than 93% of homes in Cook County
  • Smaller than 95% of homes in Cook County
  • Has a bigger lot than 94% of homes in Markham 60428
  • Older than 85% of homes in Markham 60428

What homes are worth in Markham 60428

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

This home
$92K$273K

This home is worth more than 3% of homes in Markham 60428.

How it measures up in Markham 60428

The dot is this home. The mark in the middle is the typical home in Markham 60428.

Estimated value$98,787
CheaperTypical $152,328Pricier

Pricier than 3% of homes nearby

Price per ft²$117
CheaperTypical $132Pricier

Pricier than 24% of homes nearby

Living area843 ft²
SmallerTypical 1,092 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.41 ac
SmallerTypical 0.16 acBigger

Bigger than 94% of homes nearby

Year built1948
OlderTypical 1959Newer

Newer than 15% of homes nearby

How 3620 Blackstone Ave ranks against every home in each area.
MeasureThis homeMarkham 60428Cook County
Estimated valuepricier than$98,7873% of homes2% of homes
Price per ft²pricier than$11724% of homes7% of homes
Living areabigger than843 ft²8% of homes5% of homes
Lot sizebigger than0.41 ac94% of homes79% of homes
Year builtnewer than194815% of homes33% of homes

About 3620 Blackstone Ave

How much is 3620 Blackstone Ave, Markham, IL worth?

The TopHap Estimate for 3620 Blackstone Ave, Markham, IL is $98,787 as of Sep 24, 2026. The likely range is $91,034 to $106,540. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3620 Blackstone Ave, Markham, IL last sell?

3620 Blackstone Ave, Markham, IL last sold on Aug 1, 2004 for $206,000, according to the county's recorded deed.

How big is 3620 Blackstone Ave, Markham, IL?

3620 Blackstone Ave, Markham, IL has 2 bedrooms, 1 bathrooms, 843 square feet of living space and a 0.41-acre lot.

When was 3620 Blackstone Ave, Markham, IL built?

3620 Blackstone Ave, Markham, IL was built in 1948, making it 78 years old. The building has 1 story.

What schools serve 3620 Blackstone Ave, Markham, IL?

3620 Blackstone Ave, Markham, IL is assigned to Markham Park Elementary School (elementary), rated D; Prairie-Hills Junior High School (middle), rated D+; Tinley Park High School (high), rated A. All sit in Prairie-Hills Elementary School District 144. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3620 Blackstone Ave, Markham, IL compare to other homes in Markham 60428?

Among the 4,776 homes in Markham 60428, it is worth more than 3% of them ($98,787 against a typical $152,328), its price per square foot is higher than 24% of them ($117 against a typical $132), it is bigger than 8% of them (843 ft² against a typical 1,092 ft²), its lot is bigger than 94% of them (0.41 ac against a typical 0.16 ac) and it is newer than 15% of them (1948 against a typical 1959). Measured against all of Cook County, it is worth more than 2% 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 3620 Blackstone Ave, Markham, IL?

The 2023 property tax bill for 3620 Blackstone Ave, Markham, IL was $3,862. The county assessed it at $10,000.

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