That address is in an area of apartment buildings and individual condos. Its value is unclear from Zillow (as if that's a shock!). http://www.zillow.com/homes/map/6148-south-ellis,-chicago.-IL_rb/ By checking the Cook County Assessor's office for current tax records I turned this up. But was hoping that it would have disclosed recent sales history. Sadly, it does not. http://www.cookcountyassessor.com/data/searchflat/searchdetails001.asp?FAddress=6148&Street=ellis&pinhelp1=If+you+wish+to+obtain+information+on+a+specific+residential+property+but+you+do+not+know+the+PIN%2C+simply+enter+the+address+in+the+%22Search+by+Address%22+function%2E+It+should+be+noted+that+due+to+the+transitory+nature+of+addresses%2C+our+address+file+might+contain+errors+or+omissions%2E+If+you+experience+difficulties%2C+please+call+the+Cook+County+Assessor%92s+Office+Taxpayer+Information+Department+at+312%2D443%2D7550%2E+When+entering+the+street+name+of+your+desired+property%2C+to+aid+in+your+search%2C+please+do+not+enter+the+street+suffix%2C+such+as+St%2E%2C+Dr%2E%2C+Ave%2E%2C+etc%2E+You+will+then+need+to+enter+the+city+name+in+the+box+on+the+third+line+of+the+section%2E+Please+note+that+you+do+not+need+to+select+a+class+to+conduct+a+search%2E%0D%0A%0D%0AOnce+the+required+fields+of+information+are+entered%2C+click+once+on+the+%22Search+by+Address%22+button+to+submit+your+search%2E+This+will+bring+up+a+page+with+your+desired+PIN%2C+corresponding+address%2C+city%2C+neighborhood%2C+class+code%2C+township%2C+age%2C+description+of+class+code%2C+assessed+value%2C+and+a+description+of+the+property%92s+characteristics%2E+To+compare+your+property%92s+assessed+value+to+other+similar+properties+on+your+block+or+in+your+neighborhood%2C+you+may+enter+a+range+of+addresses+on+the+search+page%2E+For+example%2C+you+may+enter+400+%96+500+N+Main+in+Chicago%2E+This+may+be+useful+if+you+are+considering+an+appeal+based+on+lack+of+uniformity%2E%0D%0A%0D%0A&City=chicago&add_search=Search+By+Address&search_type=address&pin=20143090120000