Maybe not, but The Toronto Sun Building at 333 King looks to be "available"--up for sale in other words.
Its business apparently cannibalized by the success of its own free paper, it isn't surprising that the Sun might be looking to downsize. But this Toronto Star article says no decision has been made as to whether their staff will stay in the building as tenants or relocate. Mind you, the Sun management is also claiming that the sale of the building is only being "considered"; well, if its already in this database I'd say the decision has been made already.
By the way, the Urbandb website looks like a definite bookmark. It aims to be
...an online open-content collaborative effort to accurately document development and real-estate activity.
Kind of like a "wiki" for development activity. Probably useful to activists/researchers of all sorts. Currently, the kind of information it wants to offer for free is rather, rather expensive.
h/t J. D Creighton.