Depends on the city and such, course by then, for a place like NYC, I think too many of the buildings would qualify under the historic buildings preservation that you can't tear down too many of the buildings.

I can see that with Seoul and any other cities that have been hit hard by strife. Oh, and some places like in Shanghai, they're constantly just throwing up buildings, so if a corp pays off the correct local official, yeah, you can get the building approval to put up new buildings and tear down the old stuff. lol.