[Vin]

That overhang still needs to be on support columns that have to break into the heritage building to create a Frankenstein monster, plus I'm sure the beautiful veranda walkway would be destroyed, not unless they cantilever the whole overhang, which seems quite impossible here.

Just add the additional 2 floors to the 5 stories to make sure this beautiful building is preserved. However, viewcones/height limits would make sure that will never happen.