This is an interesting thread. Here's a link you may be interested in, that gives property information for all of Racine County.http://maps.sewrpc.org/racinemapping/
Click the disclaimer, and enter the house number and street name on the next screen. Go from there...
Also, you can use the several mapping programs to zoom in on the address so you can see what's there today. Some of the programs allow you to do bird's eye view and to rotate the view. Type in the address to get the map.http://atlas.freshlogicstudios.com/http://maps.google.com/http://www.bing.com/maps/
I did all of this to research a 1909 photo of my grandparents standing in front of their building in Racine, along with some neighbors, a horse and a cow. My grandfather was a butcher. The building, although somewhat modified, is still there.