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CondominiumResidential
$339,734
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 83How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

320 RIVER ST

LEMONT, IL 60439
Building report
0
Baths
0.72 ac
Lot SizeThe size of the land the home sits on, from county records.
2007
Year BuiltThe year the home was originally built, according to county records.

Valuation

$340K
$281K low$399K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,976 (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.$14,804 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$167
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$14,637
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$20,288
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$148,040

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.55
78
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
9
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.
73
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.66 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyCOOK
Lot (acres)The size of the land the home sits on, from county records.0.72
PoolWhether the property has a pool, and what kind, such as in-ground.No

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 · 0.5 mi
E
Oakwood School
Elementary · Grades PK–1 · 1.2 mi
M
Old Quarry Middle SchoolA+
Middle · Grades 6–8 · 1.6 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

320 River 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 92% of homes in Lemont 60439
  • Has a bigger lot than 85% of homes in Cook County
  • Newer than 97% 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
$261K$1.1M

This home is worth more than 8% 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$339,734
CheaperTypical $590,703Pricier

Pricier than 8% of homes nearby

Lot size0.72 ac
SmallerTypical 0.27 acBigger

Bigger than 81% of homes nearby

Year built2007
OlderTypical 1993Newer

Newer than 84% of homes nearby

How 320 River St ranks against every home in each area.
MeasureThis homeLemont 60439Cook County
Estimated valuepricier than$339,7348% of homes51% of homes
Lot sizebigger than0.72 ac81% of homes85% of homes
Year builtnewer than200784% of homes97% of homes

About 320 River St

How much is 320 River St, Lemont, IL worth?

The TopHap Estimate for 320 River St, Lemont, IL is $339,734 as of Aug 30, 2026. The likely range is $280,892 to $398,576. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 320 River St, Lemont, IL last sell?

320 River St, Lemont, IL last sold on Jan 1, 1900, according to the county's recorded deed.

When was 320 River St, Lemont, IL built?

320 River St, Lemont, IL was built in 2007, making it 19 years old. It is a condo/apartment home.

What schools serve 320 River St, Lemont, IL?

320 River St, 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 320 River St, Lemont, IL compare to other homes in Lemont 60439?

Among the 9,056 homes in Lemont 60439, it is worth more than 8% of them ($339,734 against a typical $590,703), its lot is bigger than 81% of them (0.72 ac against a typical 0.27 ac) and it is newer than 84% of them (2007 against a typical 1993). Measured against all of Cook County, it is worth more than 51% 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 320 River St, Lemont, IL?

The 2023 property tax bill for 320 River St, Lemont, IL was $2,976. The county assessed it at $14,804.

More homes on River St

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Assigned schools

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