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Single Family ResidenceResidential
$397,073$232 / 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 Jul 14, 2026

645 1ST ST

LEMONT, IL 60439
3
Beds
2 / 1
Baths
1,715 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.
0.55 ac
Lot SizeThe size of the land the home sits on, from county records.
1899
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
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

$397K
$376K low$418K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,660 (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.$30,548 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$15,548
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$15,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,548
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$305,480

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.42
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
20
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Old Style
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.55
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.None
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached

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

E
Oakwood School
Elementary · Grades PK–1 · 0.7 mi
H
Lemont Township High SchoolA+
High · Grades 9–12 · 0.7 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

645 1st 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 86% of homes in Lemont 60439
  • Costs less per square foot than 76% of homes in Lemont 60439
  • Smaller than 72% of homes in Lemont 60439
  • Has a bigger lot than 83% of homes in Cook County
  • Older than 95% of homes in Lemont 60439

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
$274K$1.1M

This home is worth more than 14% 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$397,073
CheaperTypical $604,051Pricier

Pricier than 14% of homes nearby

Price per ft²$232
CheaperTypical $261Pricier

Pricier than 24% of homes nearby

Living area1,715 ft²
SmallerTypical 2,295 ft²Bigger

Bigger than 28% of homes nearby

Lot size0.55 ac
SmallerTypical 0.28 acBigger

Bigger than 77% of homes nearby

Year built1899
OlderTypical 1993Newer

Newer than 5% of homes nearby

How 645 1st St ranks against every home in each area.
MeasureThis homeLemont 60439Cook County
Estimated valuepricier than$397,07314% of homes62% of homes
Price per ft²pricier than$23224% of homes42% of homes
Living areabigger than1,715 ft²28% of homes61% of homes
Lot sizebigger than0.55 ac77% of homes83% of homes
Year builtnewer than18995% of homes6% of homes

About 645 1st St

How much is 645 1st St, Lemont, IL worth?

The TopHap Estimate for 645 1st St, Lemont, IL is $397,073 as of Jul 14, 2026. The likely range is $376,391 to $417,755. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 645 1st St, Lemont, IL last sell?

645 1st St, Lemont, IL last sold on Oct 30, 1996, according to the county's recorded deed.

How big is 645 1st St, Lemont, IL?

645 1st St, Lemont, IL has 3 bedrooms, 2 bathrooms, 1,715 square feet of living space and a 0.55-acre lot.

When was 645 1st St, Lemont, IL built?

645 1st St, Lemont, IL was built in 1899, making it 127 years old. It is a old style home. The building has 2 stories.

What schools serve 645 1st St, Lemont, IL?

645 1st St, Lemont, IL is assigned to Oakwood School (elementary); Lemont Township High School (high), rated A+; 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 645 1st St, Lemont, IL compare to other homes in Lemont 60439?

Among the 9,057 homes in Lemont 60439, it is worth more than 14% of them ($397,073 against a typical $604,051), its price per square foot is higher than 24% of them ($232 against a typical $261), it is bigger than 28% of them (1,715 ft² against a typical 2,295 ft²), its lot is bigger than 77% of them (0.55 ac against a typical 0.28 ac) and it is newer than 5% of them (1899 against a typical 1993). Measured against all of Cook County, it is worth more than 62% 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 645 1st St, Lemont, IL?

The 2023 property tax bill for 645 1st St, Lemont, IL was $5,660. The county assessed it at $30,548.

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