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Northbrook

Northbrook is a suburb of Chicago, located at the northern edge of Cook County, Illinois, United States. When incorporated in 1901, the village was known as Shermerville in honor of Frederick Schermer, who donated the land for its first train station. The village changed its name to Northbrook in 1923 as an effort to improve its public image. The name was chosen because the West Fork of the North Branch of the Chicago River runs through the Village.Glenbrook North High School, founded in 1952 as Glenbrook High School, is located in Northbrook. The village is also home to the Northbrook Park District, founded in 1927, Northbrook Court shopping mall, the Ed Rudolph Velodrome, the Chicago Curling Club, and the Northbrook Public Library. (Source: Wikipedia)

Housing stock map

See the share of the area's total housing units that are in single family homes, condominiums, two-to-four unit buildings, buildings with five to 49 units, and buildings with 50 units or more.


The Composition of Cook County’s Housing Market >

Housing market indicators

All of these property level data sets are connected to parcel-level data files from the county Assessors offices that include data on every parcel in the Chicago metropolitan area. All of these parcel-level data sets include historical data and are updated on a regular basis ranging from every week to every year depending on the data set.

Housing Stock Composition

The composition of a neighborhood’s housing stock determines the appropriate targeted strategies for stabilizing local housing markets. Learn more about this data set.

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Housing Units by Property Type


Property Type 2019
Single Family 79.2%
Condominium 17.3%
Building with 2-4 Units 0.2%
Building with 5+ Units 3.4%


Property Sales Activity

This indicator provides information on how active local residential property markets are, what types of properties are being purchased, who is buying them, and how much buyers are paying for properties.

Total Sales Activity

This is the total number of property sales in a given year. In Cook County, data are broken out separately for total sales activity on single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units. Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 859 591 514 382 338 392 420 559 610 651 630 671 733 643 646
Single Family 663 459 366 311 271 312 327 431 482 502 493 530 559 503 499
Condominium 196 131 148 71 66 80 92 128 128 149 137 140 172 139 146
Building with 2-4 Units -- -- -- -- -- -- 1 -- -- -- -- 1 2 -- 1
Building with 5+ Units -- 1 -- -- 1 -- -- -- -- -- -- -- -- 1 --


Sales per 100 Residential Parcels

This indicator allows users to compare the level of property sales activity across geographies. This data point represents the total number of sales on all residential parcels divided by the total number of residential parcels in a given year, multiplied by 100.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 6.6 4.5 4.0 2.9 2.6 3.0 3.2 4.3 4.8 5.1 4.9 5.2 5.7 5.0 5.0


Share of Sales, Business Buyers

This represents a range of investor types from small mom-and-pop investors to large Wall Street-traded equity funds. Heightened levels of single family homes purchased by business buyers is often indicative of a distressed and low priced inventory of homes, and low demand for owner-occupied housing in a neighborhood. In Cook County, this data point is available as the share of total sales activity where the buyer was a business entity by property type (single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units). Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 12.5% 9.6% 9.3% 10.5% 10.4% 11.2% 11.7% 5.9% 11.0% 11.1% 7.1% 9.1% 11.3% 10.3% 10.8%
Single Family 13.7% 9.8% 8.5% 8.7% 10.7% 10.9% 10.7% 6.5% 13.1% 12.4% 7.9% 10.6% 10.0% 9.3% 11.0%
Condominium 8.2% 9.2% 11.5% 18.3% 7.6% 12.5% 15.2% 3.9% 3.1% 6.7% 4.4% 2.9% 14.5% 12.9% 10.3%
Building with 2-4 Units -- -- -- -- -- -- -- -- -- -- -- 100.0% 100.0% -- --
Building with 5+ Units -- -- -- -- 100.0% -- -- -- -- -- -- -- -- 100.0% --


Share of Sales, Extremely Low Value

This represents the percent of sales that were purchased for less than $20,000 in a given year. In Cook County, this data point is available as the share of total sales activity that sold for less than $20,000 by property type (single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units). Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 0.6% 0.2% 0.2% 0.3% -- 0.3% 0.2% -- -- -- -- -- 0.8% 0.2% 0.2%
Single Family 0.3% -- -- -- -- 0.3% 0.3% -- -- -- -- -- -- 0.2% 0.2%
Condominium 1.5% 0.8% 0.7% 1.4% -- -- -- -- -- -- -- -- 3.5% -- --


Mortgage Activity

These data measure the flow of mortgage credit into an area and indicates the level of lender investment. The level of mortgage activity in a neighborhood relative to other areas can assess how access to credit has changed over time in a community and how the flow of credit differs across geographies and for different property types.

Total Mortgage Activity

This is the total number of mortgages in a given year. In Cook County, data are broken out separately for total mortgage activity on single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units. Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 3,415 3,020 2,765 2,116 2,483 2,221 1,986 2,720 1,935 1,428 1,637 1,938 1,418 1,117 1,490
Single Family 2,956 2,627 2,355 1,881 2,289 2,069 1,855 2,527 1,739 1,274 1,476 1,749 1,236 992 1,323
Condominium 458 392 409 235 193 152 129 193 194 153 161 186 179 124 167
Building with 2-4 Units 1 -- 1 -- -- -- 1 -- 2 1 -- 2 3 -- --
Building with 5+ Units -- 1 -- -- 1 -- 1 -- -- -- -- 1 -- 1 --


Mortgages per 100 Residential Parcels

Mortgages  per 100 Residential Parcel


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 26.3 23.2 21.3 16.3 19.1 17.1 15.3 20.9 15.2 11.1 12.8 15.1 11.1 8.7 11.6


Foreclosure Filing Activity

This is an indicator of distress in a local housing market and viewing changing levels of activity allows for an understanding of the evolving nature of the foreclosure crisis in a neighborhood.

Total Foreclosure Filings Activity

This is the total number of new foreclosure filings in a given year. In Cook County, data are broken out separately for foreclosure filing activity on single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units. Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 36 45 94 167 192 219 160 139 81 47 42 52 39 41 35
Single Family 31 37 83 138 163 170 134 96 62 40 39 48 31 37 28
Condominium 5 8 11 29 29 48 25 43 19 7 3 4 8 4 7
Building with 2-4 Units -- -- -- -- -- 1 1 -- -- -- -- -- -- -- --


Foreclosure Filings per 100 Residential Parcels

This indicator allows users to compare the level of foreclosure filing activity across geographies. This data point represents the total number of foreclosure filings on all residential parcels divided by the total number of residential parcels in a given year, multiplied by 100.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 0.3 0.3 0.7 1.3 1.5 1.7 1.2 1.1 0.6 0.4 0.3 0.4 0.3 0.3 0.3


Cumulative Foreclosure Filings Activity



Property Type 2019
All Residential Properties 8.5%


Foreclosure Auctions

These are properties that have completed the foreclosure process. Understanding foreclosure auction activity helps determine the flow of year-over-year of REO (real estate owned) properties into a market, how third-party demand at auctions differs based on property types, and the density of REO activity across geographies. The level of completed foreclosure auctions activity in a neighborhood indicates distress in a local housing market.

Total Auction Activity

This is the total number of completed foreclosure auctions in a given year. In Cook County, data are broken out separately for total auction activity on single family homes, condominium units, two-to-four unit buildings, and in buildings with five or more units. Outside of Cook County, data are for all residential parcels.


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 4 12 9 34 57 59 40 56 58 44 46 34 26 13 21
Single Family 3 11 5 26 46 47 25 38 38 25 38 31 24 9 20
Condominium 1 1 4 8 11 12 15 18 20 19 8 3 1 4 1
Building with 2-4 Units -- -- -- -- -- -- -- -- -- -- -- -- 1 -- --


Share of Auctions Resulting in REO

This is the percent of completed foreclosure auctions in a given geography where there were no bidders and the property became bank-owned REO (real estate owned).


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties 25.0% 91.7% 100.0% 94.1% 94.7% 93.2% 95.0% 91.1% 84.5% 77.3% 80.4% 76.5% 69.2% 76.9% 81.0%
Single Family 33.3% 90.9% 100.0% 96.2% 93.5% 95.7% 92.0% 86.8% 78.9% 72.0% 84.2% 77.4% 70.8% 88.9% 80.0%
Condominium -- 100.0% 100.0% 87.5% 100.0% 83.3% 100.0% 100.0% 95.0% 84.2% 62.5% 66.7% -- 50.0% 100.0%
Building with 2-4 Units -- -- -- -- -- -- -- -- -- -- -- -- 100.0% -- --


REO per 100 Residential Parcels


Property Type 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
All Residential Properties -- 0.1 0.1 0.2 0.4 0.4 0.3 0.4 0.4 0.3 0.3 0.2 0.1 0.1 0.1


Population and Age

Population and Age


Indicator Value
Total Population 33,343
Share of Population Aged under 18 21.9%
Share of Population Aged 18 to 44 20.2%
Share of Population Aged 45 to 64 30.9%
Share of Population Aged over 65 27.1%


Race and Ethnicity

Race and Ethnicity


Indicator Value
Share of Population that is White 78.3%
Share of Population that is African American 1.5%
Share of Population that is Hispanic or Latino 2.0%
Share of Population that is Asian 17.1%
Share of Population that is Some Other Race 1.1%


Household Income

Household Income


Indicator Value
Total Households 13,056
Share of Households with Income Less than $25,000 7.5%
Share of Households with Income $25,000 to $50,000 12.4%
Share of Households with Income $50,000 to $100,000 18.8%
Share of Households with Income $100,000 or More 61.3%


Poverty Rate

Share of Population that is under the Poverty Level


Indicator Value
Share of Population that is under the Poverty Level 3.3%


Resident Tenure

Total Households


Indicator Value
Total Households 13,056


Share of Households that are Owner-Occupied


Indicator Value
Share of Households that are Owner-Occupied 85.9%


Share of Households that are Renter-Occupied


Indicator Value
Share of Households that are Renter-Occupied 14.1%


Cost Burdened Households

Share of Owner-Occupied Households that are Cost-Burdened


Indicator Value
Share of Owner-Occupied Households that are Cost-Burdened 25.5%


Share of Renter-Occupied Households that are Cost-Burdened


Indicator Value
Share of Renter-Occupied Households that are Cost-Burdened 49.0%


Share of All Households that are Cost-Burdened


Indicator Value
Share of All Households that are Cost-Burdened 28.5%