Across the street from the AH site on Euclid is the Rolling Meadows courthouse complex, which was built in the early 70s. If you include the courthouse parking lot, the complex is roughly a tenth the size of the AH site. Multiple county and state offices are located on-site. It's not the worst municipal courthouse in Cook County (Maywood), but its facilities are dated, and if the Bears stadium goes forward, there's going to be a substantial uptick in cases that will go through their doors.
I've always wondered why the Bears haven't proposed some sort of a deal with Cook County, where the Bears would take over the Rolling Meadows complex in exchange for setting aside a part of the AH site for a new courthouse, perhaps along with something along the lines of new facilities for Illinois State Police and AH police/fire to handle the inevitable stresses that will be associated with the new stadium. I imagine that would cause AH to change its tune really quickly regarding property taxes, plus that kind of a deal would provide plenty of incentives from Cook County and Illinois to provide the sorts of financing the Bears need to get the AH stadium built.
I'm fully aware of the headaches involved with papering over a deal of that magnitude, but everyone involved would walk away claiming victory, and a shitload of beaks would get wet as a result.