Concrete bathrooms with colour-changing shower screens feature in this renovated apartment inside Moshe Safdie's famous brutalist Habitat 67 in Montreal, Canada, where scribbles on the walls date back to the housing complex's construction.

Locally based design studio Rainville Sangare? was enlisted by a couple to renovate Unit 622 in the 1960s housing complex, which is located at 2600 Avenue Pierre-Dupuy on the Marc-Drouin Quay.
Israeli-Canadian architect Sadfie's design is considered an example of brutalist architecture ? the controversial 20th-century style that has since come back in vogue ? and comprises 158 homes in 354 stacked, prefabricated concrete "boxes".

The renovated Unit 622 is made up of two of these blocks set perpendicular to each other, resembling the shape of a T in plan. One of the wings contains an open-plan living, kitchen and dining room, while the other hosts a master bedroom and guest bedroom.
A concrete wall where the two volumes meet is left exposed and is covereed with colourful markings from when the complex was constructed over 50 years ago.

"The space is structured around the junction of the blocks," said Rainville Sangare? in a statement. "The concrete junction was left bare to highlight the assembly of the building."

The studio's main change to the layout of the apartment was to include a new bathroom for guests. It slots in between the two bedrooms in the rear wing, alongside the master bedroom's en...