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Single Family ResidenceResidential
$4,904,576$845 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $990,000 on Sep 24, 1997

665 PROSPECT AVE

WINNETKA, IL 60093
5
Beds
6 / 2
Baths
5,804 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.
0.68 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$4.9M
$4.7M low$5.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$990,000 · Sep 24, 1997
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$3,535,976
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$2,828,781
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.29%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$873,600
PERL MORTGAGE INC · R · recorded May 31, 2013
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$495,000
LASALLE NATIONAL BANK

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$54,871 (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.$240,000 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$97,482
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$142,518
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$240,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,400,000

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.32
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.
61
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
66
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Split Level
CountyCook
Lot (acres)The size of the land the home sits on, from county records.0.68
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.Hot Water
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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.

E
Greeley Elementary SchoolA
Elementary · Grades KG–4 · 0.9 mi
M
The Carleton W. Washburne SchoolA
Middle · Grades 7–8 · 1.0 mi
H
New Trier Township High School - WinnetkaA-
High · Grades 10–12 · 1.2 mi

District: Winnetka School District 36

Neighborhood · ZIP 60093These 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.53
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.117
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.41

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.19,121
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,952 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$236,385
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$357,267
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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

665 Prospect Ave 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.

  • Among the most valuable homes in Cook County
  • Among the highest price per square foot in Cook County
  • Bigger than 98% of homes in Cook County
  • Has a bigger lot than 85% of homes in Cook County
  • Among the oldest homes in Winnetka 60093

What homes are worth in Winnetka 60093

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

This home
$284K$5.4M

This home is worth more than 97% of homes in Winnetka 60093.

How it measures up in Winnetka 60093

The dot is this home. The mark in the middle is the typical home in Winnetka 60093.

Estimated value$4,904,576
CheaperTypical $1,605,842Pricier

Pricier than 97% of homes nearby

Price per ft²$845
CheaperTypical $546Pricier

Pricier than 94% of homes nearby

Living area5,804 ft²
SmallerTypical 2,912 ft²Bigger

Bigger than 92% of homes nearby

Lot size0.68 ac
SmallerTypical 0.3 acBigger

Bigger than 76% of homes nearby

Year built1890
OlderTypical 1956Newer

Older than almost all homes nearby

How 665 Prospect Ave ranks against every home in each area.
MeasureThis homeWinnetka 60093Cook County
Estimated valuepricier than$4,904,57697% of homesalmost all homes
Price per ft²pricier than$84594% of homesalmost all homes
Living areabigger than5,804 ft²92% of homes98% of homes
Lot sizebigger than0.68 ac76% of homes85% of homes
Year builtnewer than1890almost no homes3% of homes

About 665 Prospect Ave

How much is 665 Prospect Ave, Winnetka, IL worth?

The TopHap Estimate for 665 Prospect Ave, Winnetka, IL is $4,904,576 as of Jul 14, 2026. The likely range is $4,696,765 to $5,112,387. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 665 Prospect Ave, Winnetka, IL last sell?

665 Prospect Ave, Winnetka, IL last sold on Sep 24, 1997 for $990,000, according to the county's recorded deed.

How big is 665 Prospect Ave, Winnetka, IL?

665 Prospect Ave, Winnetka, IL has 5 bedrooms, 6 bathrooms, 5,804 square feet of living space and a 0.68-acre lot.

When was 665 Prospect Ave, Winnetka, IL built?

665 Prospect Ave, Winnetka, IL was built in 1890, making it 136 years old. It is a split level home. The building has 2 stories.

What schools serve 665 Prospect Ave, Winnetka, IL?

665 Prospect Ave, Winnetka, IL is assigned to Greeley Elementary School (elementary), rated A; The Carleton W. Washburne School (middle), rated A; New Trier Township High School - Winnetka (high), rated A-. All sit in Winnetka School District 36. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 665 Prospect Ave, Winnetka, IL compare to other homes in Winnetka 60093?

Among the 7,003 homes in Winnetka 60093, it is worth more than 97% of them ($4,904,576 against a typical $1,605,842), its price per square foot is higher than 94% of them ($845 against a typical $546), it is bigger than 92% of them (5,804 ft² against a typical 2,912 ft²), its lot is bigger than 76% of them (0.68 ac against a typical 0.3 ac) and it is newer than almost none of them (1890 against a typical 1956). Measured against all of Cook County, it is worth more than almost all 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 665 Prospect Ave, Winnetka, IL?

The 2023 property tax bill for 665 Prospect Ave, Winnetka, IL was $54,871. The county assessed it at $240,000.

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