Developers in Chicago are building as fast as they can right now. It's counterintuitive to people on the outside, but from what I read, it's because labor, material, and capital are dirt cheap. So the developers are putting up new skyscrapers and other mega-developments so they're in a good position to take advantage of the recovery.
A new 57-story office tower opened just last week: https://www.chicagoarchitecture.org/2020/10/18/a-new-skyscra...
Dozens of new residential towers have been announced, and at least a dozen are under construction, including one that's almost finished at 101 stories tall.
https://www.chicagoarchitecture.org/2020/10/05/sit-back-brea...