Average Home Sale Price over the last 12 months from October 2010 to September 2011: Cook County: Detached homes – $258,892 Attached homes – $235,260 DuPage County: Detached homes – $341,293 Attached homes – $142,887 Kane County: Detached homes – $200,898 Attached homes – $125,700 Statistics provided by MRED Multiple Listing Service