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TownhouseResidential
$435,794$355 / 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 93How 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

509 PORTER ST

LEMONT, IL 60439
3
Beds
3 / 1
Baths
1,227 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.
2,827 ft²
Lot SizeThe size of the land the home sits on, from county records.
2019
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

$436K
$406K low$466K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,990 (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.$48,072 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,767
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$46,305
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$48,070
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$480,720

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.
5
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.Townhouse
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.07
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached

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 · 0.2 mi
E
Oakwood School
Elementary · Grades PK–1 · 1.0 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

509 Porter 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 76% of homes in Lemont 60439
  • Costs more per square foot than 94% of homes in Lemont 60439
  • Smaller than 88% of homes in Lemont 60439
  • Has a smaller lot than 96% of homes in Lemont 60439
  • Among the newest 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
$254K$1.1M

This home is worth more than 24% 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$435,794
CheaperTypical $594,306Pricier

Pricier than 24% of homes nearby

Price per ft²$355
CheaperTypical $259Pricier

Pricier than 94% of homes nearby

Living area1,227 ft²
SmallerTypical 2,319 ft²Bigger

Bigger than 12% of homes nearby

Lot size2,827 ft²
SmallerTypical 0.28 acBigger

Bigger than 4% of homes nearby

Year built2019
OlderTypical 1993Newer

Newer than 94% of homes nearby

How 509 Porter St ranks against every home in each area.
MeasureThis homeLemont 60439Cook County
Estimated valuepricier than$435,79424% of homes69% of homes
Price per ft²pricier than$35594% of homes83% of homes
Living areabigger than1,227 ft²12% of homes34% of homes
Lot sizebigger than2,827 ft²4% of homes5% of homes
Year builtnewer than201994% of homesalmost all homes

About 509 Porter St

How much is 509 Porter St, Lemont, IL worth?

The TopHap Estimate for 509 Porter St, Lemont, IL is $435,794 as of Sep 24, 2026. The likely range is $405,682 to $465,906. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 509 Porter St, Lemont, IL?

509 Porter St, Lemont, IL has 3 bedrooms, 3 bathrooms, 1,227 square feet of living space and a 0.07-acre lot.

When was 509 Porter St, Lemont, IL built?

509 Porter St, Lemont, IL was built in 2019, making it 7 years old. The building has 2 stories.

What schools serve 509 Porter St, Lemont, IL?

509 Porter 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 509 Porter St, Lemont, IL compare to other homes in Lemont 60439?

Among the 9,105 homes in Lemont 60439, it is worth more than 24% of them ($435,794 against a typical $594,306), its price per square foot is higher than 94% of them ($355 against a typical $259), it is bigger than 12% of them (1,227 ft² against a typical 2,319 ft²), its lot is bigger than 4% of them (2,827 ft² against a typical 0.28 ac) and it is newer than 94% of them (2019 against a typical 1993). Measured against all of Cook County, it is worth more than 69% 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 509 Porter St, Lemont, IL?

The 2023 property tax bill for 509 Porter St, Lemont, IL was $9,990. The county assessed it at $48,072.

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