ShonTron
Moderator
Maybe we will start seeing more of this type of thing. As low hanging fruit becomes scarcer developers will start turning to options like this. It's not even the first building on this street that got additional floors added. Didn't one of those hospitals add some floors later on?
The Shell Oil Tower, built in 1958, had seven additional floors added in 1966. It's not too hard to spot the additional floors, but they match architecturally.
The Hospital For Sick Children's University Avenue wing had two floors added around the same time the Elm Wing was built in the 1970s. Mount Sinai Hospital had an addition built on top of the original structure, but on the Murray Street side. And of course, there's the 1990s Princess Margaret Hospital which used the facade of old Ontario Hydro buildings for a taller construction as well.