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TownhouseResidential

203 N LOUIS ST

MOUNT PROSPECT, IL 60056
1,249 ft²
Lot SizeThe size of the land the home sits on, from county records.
2004
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.
Built 20044 units1,548–1,548 ft²
$1.6M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$394K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$255
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-3.9%vs the Mount Prospect ZIP median sale $/ft² ($265)

Sales Performance

$372K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
25.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
200420092011201520212025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
200420092011201520212025

7 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

3 bed
4 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
3 bd · 3 ba · 1,548 ft²
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$387K–$392K
2 units
$396K–$396K
1 unit
$432K–$432K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.100%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.0%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.10.7 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.0%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.49%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$387,157
Median tax billThe middle annual property tax bill among the building's units.$7,419
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit BDec 1, 2025$372,000Unit DFeb 9, 2021$293,000Unit BJun 29, 2015$322,500Unit DAug 12, 2011$217,500Unit CFeb 24, 2011$217,000Unit CJan 6, 2009$272,500Unit AAug 18, 2004$343,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,419 (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.$33,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,247
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$28,753
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$330,000

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.34
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
62
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
65
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
StyleThe architectural style of the home, such as ranch or colonial.Modern
CountyCOOK
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2005
Lot (acres)The size of the land the home sits on, from county records.0.03
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.Asphalt
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

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

H
Prospect High SchoolA+
High · Grades 9–12 · 1.3 mi
M
Lincoln Middle SchoolA-
Middle · Grades 6–8 · 1.3 mi
E
Westbrook Early Learning Center
Elementary · Grades PK–1 · 1.7 mi

District: Mount Prospect School District 57

Neighborhood · ZIP 60056These 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.59
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.124
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.43

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.56,070
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,043 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$99,966
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,404
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%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

203 N Louis St
3 bd · 2.5 ba · 1,548 ft²
$390K
203 N Louis St Unit A
3 bd · 3 ba · 1,548 ft²
$396K
203 N Louis St # B
3 bd · 2.5 ba · 1,548 ft²
$392K
203 N Louis St Unit C
3 bd · 3 ba · 1,548 ft²
$387K
203 N Louis St # D
3 bd · 2.5 ba · 1,548 ft²
$432K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 203 N Louis St

How many units are in 203 N Louis St, Mt Prospect, IL?

203 N Louis St, Mt Prospect, IL has 4 residential units across built in 2004, according to county assessor records.

What is a unit at 203 N Louis St, Mt Prospect, IL worth?

The median TopHap Estimate across the 4 units at 203 N Louis St, Mt Prospect, IL is $394,088. That works out to $255 per square foot. Units run from 1,548 to 1,548 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 203 N Louis St, Mt Prospect, IL expensive for Mount Prospect?

Units at 203 N Louis St, Mt Prospect, IL carry a median of $255 per square foot, 4% below the Mount Prospect median of $265 per square foot.

How often do units sell at 203 N Louis St, Mt Prospect, IL?

1 units at 203 N Louis St, Mt Prospect, IL sold in the last 12 months, out of 7 recorded arms-length sales all time. That is a turnover rate of 25.0% of the building per year. The median sale over that period was $372K.

Have units at 203 N Louis St, Mt Prospect, IL appreciated?

Across 3 repeat sales of the same unit, 203 N Louis St, Mt Prospect, IL returned a median 1.4% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 9.5 years.

What floor plans does 203 N Louis St, Mt Prospect, IL have?

The most common plan at 203 N Louis St, Mt Prospect, IL is a 3-bedroom of 1,548 square feet, repeated 4 times, with a median estimate of $394,088. TopHap identifies 1 recurring plans in the building.

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