Check your mail and fill out the Census - what to look for
Download the data tools require a Cityscape Permits membership
Residents report vacant and abandoned buildings in their neighborhoods to 311 in Chicago, and these are displayed on the map.
Building owners are required to register their own buildings as vacant, but those are not included in this map. The City of Chicago's Vacant Building Registry where owners must register their buildings.
You can report a building that you suspect is vacant or abandoned by calling 311 in Chicago, or using the City of Chicago's online form.