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 about Sculp IT adds "world's largest pivoting window" to an Antwerp townhouse
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 about Studio Inches raises the roof of a Swiss home to create a lofty living space
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 about Gabled extension by BKK Architects borrows the form of a doll's house
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 about CUT Architectures adds a second concrete-framed extension to a French home
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 about Lakeside concrete pavilion by NE-AR houses a fireplace inside a twisted column
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 about Antonia Reif adds an inconspicuous extension to a 1960s Rotterdam bungalow
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 about Fraher Architects includes textured brick cladding on north London house extension
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 about Gianluca Gelmini inserts an angular iron staircase inside a medieval Italian fortress
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 about Fraher Architects completes an extension with a window that stretches up to the roof
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 about Concrete and glass extension to Belgian house shelters a poolside patio
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 about B.E. Architecture adds gridded glass rooms to a Melbourne residence
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 about Superkül extends Canadian farmhouse with rusty Corten-clad block
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 about Faceted concrete capsule by Noborders Collective extends a Mexican residence
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 about Make Architecture adds perforated wooden facade to renovated and extended Melbourne house
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 about David Kohn's Sanderson House extension conceived as a fox in the garden
The sloping roofline of an old extension to a London residence is surrounded by the pale brickwork of its replacement, designed by local studio Tsuruta Architects (+ slideshow). More about Remodelled London house extension reveals the outline of its predecessor
This blackened plywood box added by architect Antonin Ziegler to one end of a rural home on France's northern coast provides a private library and garage for its inhabitants (+ slideshow). More about Blackened timber reading room extends a coastal home in northern France
A sloped section of roof joins this timber-clad extension by Melbourne studio Julie Firkin Architects to the adjacent weatherboard house (+ slideshow). More about Triangular void connects a two-storey timber extension to a Melbourne bungalow
Slender batons of untreated larch cover two extensions erected in the garden of this semi-detached home in London, as part of a refurbishment and remodelling by architecture studio Haptic (+ slideshow). More about Haptic adds a pair of extensions to a Victorian home in west London
A cylindrical tower clad in weathered steel forms part of this extension to a 19th-century stone cottage in the English countryside, designed to recall a gasworks that previously stood on the site. More about Chris Dyson Architects adds a rusty steel tower to a rural stone cottage