Basement

MASA Architects design a serene urban hideout with open-plan spaces that juxtapose gritty, exposed brick and concrete with silky stone and glass finishes.

The new bedroom is a bright, open space with views to mature trees and distant views to Lake Ontario. "T

A cantilevered staircase with tread and railings composed of translucent steel mesh now connects the second and third floors.

Like all the interior rooms, the furniture elements in the master bedroom have been built into the architecture, making efficient use of the compact space.

The dining area connects to the backyard pool area via glass sliding doors. A teak sliding screen opens to a separate den.

In the kitchen, the showstopping ceiling’s herringbone pattern is echoed by the terra-cotta tiles on the floor. Architect Michael O’Sullivan, who designed the steel-and-glass kitchen cabinets, the table, and the pendant lights (made by Lava Glass), further amped up the richness of the room by specifying an onyx kitchen island. Interior designer Yvette Jay, a collaborator and classmate of O’Sullivan, kept her material palette “tight and limited. I had to restrict myself so that everything here ties in with the architecture.”

O’Sullivan designed the ceiling “to have a knitted or woven quality like that of wool or silk.” It dives down over the kitchen and dining area, eventually reaching a point at the entry that is low enough to touch. Here, resident Jes Wood leans against the onyx kitchen island while her daughter Ruby hangs out. Replica Jean Prouvé chairs surround the dining table; a vase by Bruce and Estelle Martin for Kamaka Pottery sits on top. The Reel table under the television is by Atelier Oï for B&B Italia.

Sunlight from the leafy courtyard dapples the airy kitchen.

Custom kitchen cabinetry with a stone countertop is made of the same ash wood sustainably harvested in Canada.