As far as I can tell, for the past month or so they've been tearing apart the *old* part of the building, and doing it from 11 PM to 3 or 4 AM. And there are definitely city by-laws about such noise - no construction is allowed from 7 PM to 7 AM, and to my knowledge no extension has been granted (no notice given).

Frankly, though, this is but the tip of the iceberg with what they've been doing lately... and in this case, they moved into the neighborhood, not the other way around! :-)