We stayed for 2 nights for Loyola graduation, which is a 20 minute walk from the property.
The full apartment sits above Scott's shop/garage in a coach house separate from the main house.
The coach house is as described and Scott is a genial host. I was pleasantly surprised by the details Scott had taken care of: the fridge was stocked with cream and other sundries, there was an A/C unit, and there were dishes and even a corkscrew.
I highly recommend it as a comfortable place to lay your head while spending your days taking in Chicago.