Supertalls: Super complicated and super interesting, their sheer presence is a statement in itself.

Supertall residential buildings bring housing density to a relatively small footprint, but present enormous challenges for all that ambition — financing trouble, architectural and engineering feats, sky-high maintenance costs. Verticalizing cities is by no means an easy way out.

“I think, in the midst of a housing crisis, when you have the opportunity to build housing in a way that doesn’t sprawl out into our greenery, it is not a bad thing,” says Councillor Robin Buxton-Potts. She’s interim councillor for Ward 13 Toronto Centre, where the 95-storey Concord Sky project is landing at Yonge and Gerrard.