I drove by today to see what was going on, and I agree, the site prep currently going on is where they intend to build the office building.
I really don't think this is the next building they are going to construct though. Tannery Place North is nearly completely pre-leased and I can't imagine them not pressing ahead with immediate construction for a 2021 occupancy.
The real question is whether Building #3 will be the Home 2 Suites Hotel or the office building. Personally, I think with market justification, they would build the hotel next.
There are three possibilities for the current site prep that I can think of.
1) - Tannery Place North and the office building are going to share a common surface parking area, and they have to level the ground now prior to construction of Tannery Place North.
2) - There will be an entrance into the Junction Urban Village just to the west of the Main/Vaughan Harvey intersection, and this is in preparation for that.
3) - as noted above, this might have something to do with constructing a pad for the relocated tower crane for Tannery place North.
Tannery Place South - current status: