This extension to the roof of a Brussels apartment block by local studio Notan Office features a fireplace that takes its cues from the work of modernist architect and designer Alvar Aalto. More
Atelier Pierre Thibault has restored and enlarged an early 19th-century home in Montreal, creating two separate libraries and a writing studio overlooking a river. More
Austin-based architect Tom Hurt has extended the back of a ranch house using a series of stacked units and wooden interiors to form a multi-storey living space. More
Brooklyn-based Office of Architecture has completely gutted and expanded a local row house for an architect, jewellery designer and their two children. More
A climbing wall, a study and a bedroom are all contained within this Brisbane house extension, designed by Phorm Architecture + Design to be reminiscent of a treehouse. More
Skylights helps to bring daylight into all three levels of this Porto townhouse, which has been refurbished and extended by local studio Pablo Pita Architects. More
A large sliding window set into the end wall of this extension to a terraced house in Dublin by Irish practice Architectural Farm is enclosed within a wooden frame that provides internal and external seating. More
Floor-to-ceiling windows allow guests to wake up to views of the Dolomites at this complex of copper-clad holiday apartments in northern Italy by Plasma Studio. More
US firm Jensen Architects has revamped a Victorian home in San Francisco with perforated aluminium panels across the back and minimalist interiors to match. More
New York firm EL Studio has placed a contemporary box-shaped extension on top of this suburban home in Maryland to more than double its size. More
Located near Dublin's docklands, this three-storey Georgian terraced house has been converted from three bed-sits into one light-filled "upside-down house" with a charred-larch extension at the back. More
This moody Melbourne house extension by local studio Branch Studio Architects features dark rammed-charcoal walls, window nooks and an outdoor bathtub. More
British studio Guarnieri Architects has added a glazed box containing a swimming pool, hot tub and steam room to the rear of a Victorian terrace in Clapham Common, south London. More
A pair of interlocking volumes clad in pale brick and fronted by large, frameless windows extend the rear of this Victorian house in west London, which has been overhauled by McLaren Excell. More
London studio Amin Taha Architects has updated a 1950s terraced house in the city's Bayswater neighbourhood, adding a basement level topped with a rugged concrete soffit and a lightwell set into a courtyard garden. More
Architecture studio Bergmeisterwolf has completed an extension to a house on the shores of Italy's Lake Garda, featuring glazed walls that disappear into the ground to open the living area up to the garden. More
San Francisco firm Schwartz and Architecture has overhauled a single-family home on a steep and narrow site, lifting the existing building to add a storey beneath it, and creating an extension at the back over three levels. More
Rust-toned frames cover the facade of this extension to a central London home, which Gianni Botsford Architects designed to house its owner's private collection of photographs, prints and lithographs. More
Casey Hughes Architects has renovated and extended a 1950s house in Los Angeles, adding a tall metal-clad volume featuring a pair of high windows. More
Canadian studio Aleph-Bau has overhauled an urban residence in Toronto, creating a bright white facade and adding a sculptural rooftop volume wrapped in aluminium. More