The two elongated wings that make up this extension to an Australian farmhouse are set into the side of a hill, connected by a stairwell that offer views straight through its middle (+ slideshow). More
This collection of angular asphalt-clad roof extensions provide elevated sleeping platforms, a study and a pair of funnel-shaped skylights for a home in eastern Denmark. More
A concrete floor merges with seating inside and outside this rusted steel and glass extension to a Victorian-style house in west London, designed by local architecture studio McLaren Excell (+ slideshow). More
Strips of black-stained timber give a charred appearance to this extension to a north-west London flat, designed by Fraher Architects to create a bigger kitchen for a client who loves to cook (+ slideshow). More
Architecture studio Cadaval & Solà-Morales has transformed a traditional white brick house in Mexico City into an apartment complex, with the addition of a row of black penthouses (+ slideshow). More
A pair of glass doors, weighing almost four tonnes and measuring six metres in height, pivot out towards the garden of this renovated Antwerp home. More
The tiled roof of this residence in Switzerland has been raised by one metre to provide extra height for the newly renovated spaces within. More
A doll's house provided the inspiration for this extension to a house outside Melbourne, which features a gabled profile, a simple gridded layout and a transparent rear facade (+ slideshow). More
Paris studio CUT Architectures has returned to the house it extended in 2011 to create a glazed study featuring a yellow staircase that integrates a desk (+ slideshow). More
A pair of twisted concrete fins frame a fireplace at the centre of this pavilion, designed by German architecture office NE-AR as an extension to an holiday home in Argentina (+ slideshow). More
Rotterdam architect Antonia Reif has renovated and extended a modest 1960s bungalow, creating a two-storey living room and a generous bedroom that both open out to the garden (+ slideshow). More
Slate-grey bricks applied in zigzagging rows give the walls of this London house extension a faceted texture that contrasts the smooth, pale yellow brickwork of the original property (+ slideshow). More
A colossal iron staircase bursts through the medieval stone walls of this fortified tower in rural Italy and into a copper-clad extension, as part of a renovation by local studio Gianluca Gelmini (+ slideshow). More
A sliver of glazing stretches all the way up from the ground to the roof of this extension to a west London house, which is named The Lantern in reference to the way it glows at night (+ slideshow). More
This extension to a home in Kortrijk, Belgium, was added by local architect Steven Vandenborre to wrap around the property's outdoor swimming pool (+ slideshow). More
A cluster of glass pavilions positioned around the base of this existing Melbourne house open onto terraces that are sheltered by a copper-edged canopy (+ slideshow). More
Pre-rusted steel clads this L-shaped extension to a farmhouse in rural Canada, giving the block a burnt orange colouring that complements the red brickwork of its neighbour (+ slideshow). More
This concrete pod with faceted sides and a glass facade is perched up over a courtyard, creating an extension to a house in Mexico that doesn't compromise its existing outdoor spaces (+ slideshow). More
Melbourne studio Make Architecture has renovated a red brick bungalow outside the city, adding an extension featuring a decorative timber facade that references brickwork patterns (+ slideshow). More
This London house extension features a red brick exterior thought to look like a profile of a fox and a multi-hued interior that references Adolf Loos' Modernist houses of the 1920s (+ slideshow). More