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Single Family ResidenceResidential
$322,516$240 / 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 THORNTON ST

LOCKPORT, IL 60441
1
Baths
1,346 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.
1.05 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.
2
StoriesHow many floors the home has above ground.

Valuation

$323K
$298K low$347K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,504 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$103,324 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$49,416
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$53,908
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$96,384
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$309,972

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.49
39
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
22
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.
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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

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
CountyWILL
Lot (acres)The size of the land the home sits on, from county records.1.05
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
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.

E
Walsh Elementary School
Elementary · Grades PK–1 · 0.7 mi
H
Lockport Township High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Oak Prairie Junior High SchoolA+
Middle · Grades 6–8 · 2.2 mi

District: Will County School District 92

Neighborhood · ZIP 60441These 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.96
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.35,427
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,391 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$100,510
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$113,100
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.37 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 Thornton 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.

  • Costs more per square foot than 78% of homes in Lockport 60441
  • Smaller than 76% of homes in Lockport 60441
  • Has a bigger lot than 96% of homes in Lockport 60441
  • Older than 91% of homes in Will County

What homes are worth in Lockport 60441

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

This home
$135K$682K

This home is worth more than 40% of homes in Lockport 60441.

How it measures up in Lockport 60441

The dot is this home. The mark in the middle is the typical home in Lockport 60441.

Estimated value$322,516
CheaperTypical $349,672Pricier

Pricier than 40% of homes nearby

Price per ft²$240
CheaperTypical $213Pricier

Pricier than 78% of homes nearby

Living area1,346 ft²
SmallerTypical 1,768 ft²Bigger

Bigger than 24% of homes nearby

Lot size1.05 ac
SmallerTypical 0.22 acBigger

Bigger than 96% of homes nearby

Year built1948
OlderTypical 1996Newer

Newer than 12% of homes nearby

How 509 Thornton St ranks against every home in each area.
MeasureThis homeLockport 60441Will County
Estimated valuepricier than$322,51640% of homes37% of homes
Price per ft²pricier than$24078% of homes74% of homes
Living areabigger than1,346 ft²24% of homes26% of homes
Lot sizebigger than1.05 ac96% of homes95% of homes
Year builtnewer than194812% of homes9% of homes

About 509 Thornton St

How much is 509 Thornton St, Lockport, IL worth?

The TopHap Estimate for 509 Thornton St, Lockport, IL is $322,516 as of Sep 24, 2026. The likely range is $298,416 to $346,616. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Thornton St, Lockport, IL last sell?

509 Thornton St, Lockport, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 509 Thornton St, Lockport, IL?

509 Thornton St, Lockport, IL has 1 bathrooms, 1,346 square feet of living space and a 1.05-acre lot.

When was 509 Thornton St, Lockport, IL built?

509 Thornton St, Lockport, IL was built in 1948, making it 78 years old. The building has 2 stories.

What schools serve 509 Thornton St, Lockport, IL?

509 Thornton St, Lockport, IL is assigned to Walsh Elementary School (elementary); Lockport Township High School (high), rated A+; Oak Prairie Junior High School (middle), rated A+. All sit in Will County School District 92. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Thornton St, Lockport, IL compare to other homes in Lockport 60441?

Among the 12,513 homes in Lockport 60441, it is worth more than 40% of them ($322,516 against a typical $349,672), its price per square foot is higher than 78% of them ($240 against a typical $213), it is bigger than 24% of them (1,346 ft² against a typical 1,768 ft²), its lot is bigger than 96% of them (1.05 ac against a typical 0.22 ac) and it is newer than 12% of them (1948 against a typical 1996). Measured against all of Will County, it is worth more than 37% 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 Thornton St, Lockport, IL?

The 2025 property tax bill for 509 Thornton St, Lockport, IL was $6,504. The county assessed it at $103,324.

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