The wooden facade of this Toronto property by local practice Williamson Chong Architects is set-back and angled towards a nearby ravine (+ slideshow).
The Bala Line home, which accommodates a family of five, is situated on a street towards the western edge of the ravine, and sits 60 feet (18.3 metres) above the disused Bala Line railway.
In order to reflect the surrounding terrain, the architects stacked a series of staggered terraced spaces on top of each other.
They added a shallow wooden void to the front facade, which is angled to provide the interior with daylight from the south and west.
"This house integrates a series of terraced spaces strung together by a staircase – coinciding with the cascading topography beyond," said the architects.
"The project erodes toward the ravine, leaving a light-filled series of upper spaces capturing any natural light and thermally moderating effects of fresh valley air – most notably in the form of a carved front facade," they added.
Towards the back of the house, both a sliding glazed door and glass wraparound wall can be pulled away to open up a corner of the house to the outside.
A shallow set of stairs provides access to the interior space, as well as doubling up as tiered seating for family and guests in the garden.
Inside, the sunken living room at the rear of the house is situated next to a higher open-plan dining and kitchen area.
Two children's bedrooms and a large bathroom are located on the second floor, while the master bedroom and en suite occupy the entire third floor.
Throughout the majority of the property, walls are painted white and floors are wooden – with the exception of the kitchen, where light-coloured floor tiles contrast with wooden cabinets.
Williamson Chong Architects was founded in 2011 by Donald Chong, Betsy Williamson and Shane Williamson. The Toronto studio's previous projects include a house in Frogs Hollow that burrows into the Ontario landscape.
Photography is by Bob Gundu.