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CondominiumResidential
$415,474$143 / 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 85How 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 $400,000 on Mar 11, 2025

857 ILLINOIS ST # R4

LEMONT, IL 60439
4
Beds
3
Baths
2,900 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.
0.59 ac
Lot SizeThe size of the land the home sits on, from county records.
2005
Year BuiltThe year the home was originally built, according to county records.

Valuation

$415K
$353K low$478K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Mar 11, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,147 (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.$34,390 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,017
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$30,373
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$34,389
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$343,900

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.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
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.
45
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.Condominium
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.59
HeatingThe type of heating system in the home.None

Transaction History(3)

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.

H
Lemont Township High SchoolA+
High · Grades 9–12 · 0.1 mi
E
Oakwood School
Elementary · Grades PK–1 · 1.2 mi
M
Old Quarry Middle SchoolA+
Middle · Grades 6–8 · 1.8 mi

District: Lemont Township High School District 210

Neighborhood · ZIP 60439These 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.38
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 100.50

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
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.25,154
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.776 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$127,381
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$151,623
Average tempThe average temperature here across a full year.49°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

857 Illinois St # R4 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 80% of homes in Lemont 60439
  • Among the lowest price per square foot in Lemont 60439
  • Bigger than 88% of homes in Cook County
  • Has a bigger lot than 83% of homes in Cook County
  • Newer than 94% of homes in Cook County

What homes are worth in Lemont 60439

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

This home
$251K$1.1M

This home is worth more than 20% of homes in Lemont 60439.

How it measures up in Lemont 60439

The dot is this home. The mark in the middle is the typical home in Lemont 60439.

Estimated value$415,474
CheaperTypical $593,866Pricier

Pricier than 20% of homes nearby

Price per ft²$143
CheaperTypical $258Pricier

Cheaper than almost all homes nearby

Living area2,900 ft²
SmallerTypical 2,294 ft²Bigger

Bigger than 69% of homes nearby

Lot size0.59 ac
SmallerTypical 0.28 acBigger

Bigger than 78% of homes nearby

Year built2005
OlderTypical 1993Newer

Newer than 81% of homes nearby

How 857 Illinois St # R4 ranks against every home in each area.
MeasureThis homeLemont 60439Cook County
Estimated valuepricier than$415,47420% of homes65% of homes
Price per ft²pricier than$143almost no homes13% of homes
Living areabigger than2,900 ft²69% of homes88% of homes
Lot sizebigger than0.59 ac78% of homes83% of homes
Year builtnewer than200581% of homes94% of homes

About 857 Illinois St # R4

How much is 857 Illinois St # R4, Lemont, IL worth?

The TopHap Estimate for 857 Illinois St # R4, Lemont, IL is $415,474 as of Sep 24, 2026. The likely range is $353,419 to $477,529. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 857 Illinois St # R4, Lemont, IL last sell?

857 Illinois St # R4, Lemont, IL last sold on Mar 11, 2025 for $400,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 857 Illinois St # R4, Lemont, IL?

857 Illinois St # R4, Lemont, IL has 4 bedrooms, 3 bathrooms, 2,900 square feet of living space and a 0.59-acre lot.

When was 857 Illinois St # R4, Lemont, IL built?

857 Illinois St # R4, Lemont, IL was built in 2005, making it 21 years old.

What schools serve 857 Illinois St # R4, Lemont, IL?

857 Illinois St # R4, Lemont, IL is assigned to Lemont Township High School (high), rated A+; Oakwood School (elementary); Old Quarry Middle School (middle), rated A+. All sit in Lemont Township High School District 210. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 857 Illinois St # R4, Lemont, IL compare to other homes in Lemont 60439?

Among the 9,089 homes in Lemont 60439, it is worth more than 20% of them ($415,474 against a typical $593,866), its price per square foot is higher than almost none of them ($143 against a typical $258), it is bigger than 69% of them (2,900 ft² against a typical 2,294 ft²), its lot is bigger than 78% of them (0.59 ac against a typical 0.28 ac) and it is newer than 81% of them (2005 against a typical 1993). Measured against all of Cook County, it is worth more than 65% 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 857 Illinois St # R4, Lemont, IL?

The 2023 property tax bill for 857 Illinois St # R4, Lemont, IL was $7,147. The county assessed it at $34,390.

More homes on Illinois St # R4

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