I've been looking around for apartments in Westdale, this building is on the corner of King and North Oval, across from the Tim Horton's and the library. I went as far as to check the address (4 North Oval), though it doesn't seem to exist anywhere on the internet. Anyone now anything about this building?

It's probably condos or otherwise unavailable if there's no internet trail. Have you checked out the buildings over on Main West, by White Chapel Cemetery? I know you said Westdale, but there are at least ten or twelve buildings you could check out down there.

It's probably a massive drug operation.

You could just knock and ask where the superintendent is (or contact info) if you really want to know?

Why are you interested in the unknown though, there's lots of apartments all over the place.. in my opinion it's best to stick with something that has an 'internet trail' just as a bonus.. that way you know of the good and bad, and that it's established enough for the owner to do all that stuff.