Quote:
Originally Posted by drummer
Haha, yeah I doubt anything remotely close to adding floors to skyscrapers in the way I described will ever happen - probably cheaper to tear down and build a new one.
Then the old post office site is on the other side - what are the restrictions to that one?
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There is no height restriction for the post office block north of the park. In fact, that site was planned to have a 40-story tower on it at one point that was said to be around 550 feet. Novare was the developer, and there are still plans for as much as 800,000 square feet of space on it, but nothing definite.
As for adding floors to skyscrapers, it can be done, and even many years after they've been "finished" as long as it's been engineered to happen. The Blue Cross-Blue Shield Tower in Chicago was completed in 1997. It was 410 feet tall with 32 floors. In 2010 they completed an addition to the building that added 22 floors. So it went from being a 410 foot building with 32 floors to a 744 foot building with 54 floors.
Here's the database page.
http://skyscraperpage.com/cities/?buildingID=6375
Here's the construction thread. It's almost 10 years old, so some of the image links don't work anymore.
http://forum.skyscraperpage.com/showthread.php?t=111764