The architect says Krueck & Sexton was commissioned for the project when the tower was just half built. This meant the team could have an input on drawings for the top two penthouse floors, including the position of the stairs.
"We always envisaged that the stairs would be a special element," Lundgren says. "One doesn't normally expect to see stairs in an apartment tower, so we chose to play this up by creating a sculptural glass staircase and positioning it right in the centre of the apartment. This means you are constantly interacting with the stairs. When you first enter the penthouse, you are confronted with the stairway, and you are always walking around it, beneath it or on it as you move though the space. This helped drive the materiality of the stair."
The staircase, which features glass treads, sits on an onyx plinth, which is illuminated from beneath. The stairs are also defined by a custom-patterned, sandblasted glass wall that extends down through both floors, linking the public areas on the lower level with the private master suite on the upper level.
"The pattern is imprinted on both sides of the glass, but the patterns are slightly out of alignment, so the glass has a movement of its own. It appears to dance as you move past," says Lundgren.
In keeping with the owners' desire for a light, airy space that would be both a sanctuary and an ideal home for entertaining, the living spaces feature white walls and expansive, floor-to-ceiling double-height windows that maximise spectacular city and lake views.