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Single Family ResidenceResidential
$331,710
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 91How 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
Last sold for $295,000 on Jun 28, 2022

520 THORNTON ST

LOCKPORT, IL 60441
3
Beds
2.5
Baths
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
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.

Valuation

$332K
$303K low$361K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$295,000 · Jun 28, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,264 (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.$105,524 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$32,087
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$73,437
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$98,437
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$316,572

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.
24
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.
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
StyleThe architectural style of the home, such as ranch or colonial.Split Level
CountyWILL
Lot (acres)The size of the land the home sits on, from county records.0.40
HeatingThe type of heating system in the home.Yes
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

Foreclosure Filings(1)

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 · 2.3 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

520 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.

  • Has a bigger lot than 86% of homes in Lockport 60441
  • Older than 68% 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
$139K$670K

This home is worth more than 43% 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$331,710
CheaperTypical $350,098Pricier

Pricier than 43% of homes nearby

Lot size0.4 ac
SmallerTypical 0.22 acBigger

Bigger than 86% of homes nearby

Year built1977
OlderTypical 1996Newer

Newer than 35% of homes nearby

How 520 Thornton St ranks against every home in each area.
MeasureThis homeLockport 60441Will County
Estimated valuepricier than$331,71043% of homes40% of homes
Lot sizebigger than0.4 ac86% of homes82% of homes
Year builtnewer than197735% of homes32% of homes

About 520 Thornton St

How much is 520 Thornton St, Lockport, IL worth?

The TopHap Estimate for 520 Thornton St, Lockport, IL is $331,710 as of Aug 30, 2026. The likely range is $302,534 to $360,886. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 520 Thornton St, Lockport, IL last sell?

520 Thornton St, Lockport, IL last sold on Jun 28, 2022 for $295,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 520 Thornton St, Lockport, IL?

520 Thornton St, Lockport, IL has 3 bedrooms, 2.5 bathrooms and a 0.40-acre lot.

When was 520 Thornton St, Lockport, IL built?

520 Thornton St, Lockport, IL was built in 1977, making it 49 years old. It is a split level home. The building has 2 stories.

What schools serve 520 Thornton St, Lockport, IL?

520 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 520 Thornton St, Lockport, IL compare to other homes in Lockport 60441?

Among the 12,513 homes in Lockport 60441, it is worth more than 43% of them ($331,710 against a typical $350,098), its lot is bigger than 86% of them (0.4 ac against a typical 0.22 ac) and it is newer than 35% of them (1977 against a typical 1996). Measured against all of Will County, it is worth more than 40% 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 520 Thornton St, Lockport, IL?

The 2025 property tax bill for 520 Thornton St, Lockport, IL was $7,264. The county assessed it at $105,524.

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