[lachlanholmes]

Rooftop amenity space explains the switch to concrete, at least partially. At the DRP I believe it was stated they couldn’t add rooftop amenity space because in the eyes of the building code it would make it a seven storey building, and not a six storey building, which is generally the limit for wood structures.

The cost of lumber going through the roof right about when this project started construction probably helped the switch as well, too.