I thought that I'd do what I like to do so much -- crunch some numbers! I am trying to come up with a reasonable height for this tower, with a given number of floors and a given per-square-foot budget.
I will look at four possible spending options: cheap, medium-budget, high-budget and luxury. Given the anticipated 12% office vacancy rates when this tower comes on line, I doubt that Caisse de Dépots et Placements will go cheap, given that a little extra money on building quality will make it significantly easier to attract tenants. The project will (in my opinion) probably be in the 'medium-budget' or 'high-budget' class. I have 'luxury' as an option, but realistically it's doubtful -- although I would be happy to be proven wrong.
Here are the numbers I am using. They are guesses on my part, if anybody has more realistic numbers, I would use them instead.
HEIGHT PER STANDARD FLOOR
Cheap: 3.9m
Medium: 4.1m
High: 4.3m
Luxury: 4.5m
TOTAL EXTRA CEILING HEIGHT DUE TO PODIUM
Cheap: none
Medium: 4m
High: 8m
Luxury: 12m
EXTRA ROOF HEIGHT, OTHER THAN ESSENTIAL MECHANICAL (5m)
Cheap: none
Medium: 5m
High: 10m
Luxury: 20m
45f=180.5m / 46f=184.4m / 47f=188.3m / 48f=192.2m / 49f=196.1m / 50f=200.0m (cheap)
45f=198.5m / 46f=202.6m / 47f=206.7m / 48f=210.7m / 49f=214.8m / 50f=218.9m (medium-budget)
45f=216.5m / 46f=220.8m / 47f=225.1m / 48f=229.4m / 49f=233.7m / 50f=238.0m (high-budget)
45f=239.5m / 46f=244.0m / 47f=248.5m / 48f=253.0m / 49f=257.5m / 50f=262.0m (luxury)
For comparison, other MINT towers include Bay-Adelaide West u/c at 50f, 218m (medium-budget by this scale), Bay Wellington at 49f, 207m (between cheap and medium-budget), and Royal Trust at 46f, 183m (cheap). FCP at 72f, 298m is also between cheap and medium-budget by modern standards, as is Commerce Court West at 57f, 239m.
We need to keep in mind that Toronto is still quite conservative when it comes to floor height, compared to some other cities. Bay-Adelaide West is hardly 'medium-budget' for Toronto, but it is when compared to office towers going up in say Dubai (leaving aside the much lower labour and other costs there).
If this tower follows suit, it is likely to end up between 200m and 220m, depending on the number of floors.
Bill