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Apartments (Generic)Residential
Last sold for $75,250,000 on Jan 13, 2026

1550 DEMPSTER ST # 99

MOUNT PROSPECT, IL 60056
0
Baths
10.26 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$75,250,000 · Jan 13, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$660,391 (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.$2,534,627 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$380,072
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,154,555
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$2,534,625
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$25,346,270

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.35
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.
62
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
64
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.Apartments (Generic)
StyleThe architectural style of the home, such as ranch or colonial.Two Family
CountyCook
Lot (acres)The size of the land the home sits on, from county records.10.26
HeatingThe type of heating system in the home.None

Transaction History(12)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

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

E
Robert Frost Elementary SchoolB
Elementary · Grades KG–5 · 0.4 mi
M
Friendship Junior High SchoolB+
Middle · Grades 6–8 · 1.4 mi
H
Prospect High SchoolA+
High · Grades 9–12 · 2.9 mi

District: Community Consolidated School District 59

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%

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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

1550 Dempster St # 99 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 97% of homes in Cook County

How it measures up in Mount Prospect 60056

The dot is this home. The mark in the middle is the typical home in Mount Prospect 60056.

Lot size10.26 ac
SmallerTypical 0.22 acBigger

Bigger than 95% of homes nearby

Year built1965
OlderTypical 1965Newer

Newer than 52% of homes nearby

How 1550 Dempster St # 99 ranks against every home in each area.
MeasureThis homeMount Prospect 60056Cook County
Lot sizebigger than10.26 ac95% of homes97% of homes
Year builtnewer than196552% of homes59% of homes

About 1550 Dempster St # 99

When did 1550 Dempster St # 99, Mount Prospect, IL last sell?

1550 Dempster St # 99, Mount Prospect, IL last sold on Jan 13, 2026 for $75,250,000, according to the county's recorded deed. TopHap holds 7 recorded sales for this parcel.

When was 1550 Dempster St # 99, Mount Prospect, IL built?

1550 Dempster St # 99, Mount Prospect, IL was built in 1965, making it 61 years old. It is a two family home.

What schools serve 1550 Dempster St # 99, Mount Prospect, IL?

1550 Dempster St # 99, Mount Prospect, IL is assigned to Robert Frost Elementary School (elementary), rated B; Friendship Junior High School (middle), rated B+; Prospect High School (high), rated A+. All sit in Community Consolidated School District 59. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1550 Dempster St # 99, Mount Prospect, IL compare to other homes in Mount Prospect 60056?

Among the 17,955 homes in Mount Prospect 60056, its lot is bigger than 95% of them (10.26 ac against a typical 0.22 ac) and it is newer than 52% of them (1965 against a typical 1965). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 1550 Dempster St # 99, Mount Prospect, IL?

The 2023 property tax bill for 1550 Dempster St # 99, Mount Prospect, IL was $660,391. The county assessed it at $2,534,627.

More homes on Dempster St # 99

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Assigned schools

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