285 units if you use the as built parking with a 0.8 ratio. Of course, could up that with parking above grade with some redesign.
With this perhaps going forward as residential as conceptualized, I bet the taller tower would go ahead first, as the parking in the first phase can't support either tower. It would also hedge bets, as when the project is ready for the second tower, they can choose between residential and office.
Question for planners: does the old Beltline floorplate restriction still exist? This site is in the 930m2 area.
This is a 930m2 polygon on the site, with a 24m building to building setback, and lines showing a 1.5 m setback:
To hit maximum density without needing relaxation of the current rules floorplate rules, you want a three tower project instead:
Fortunately, a three tower project would fit on the site and still comply with all the rules, and not involve a tower straddling old and new, or a tower that can't utilize the existing parkade core. A three tower project at 12 FAR would let you build 3 towers each at 30 residential floors give or take (around 90-91 floors combined).