This timber-clad house extension in Norway by Oslo studio Rever & Drage features curvy towers that point outwards like periscopes (+ slideshow). More »

Dutch studio Maxwan has renovated a thatched house in the seaside town of Noordwijk in the Netherlands and added concrete and glass protrusions to the front and back (+ slideshow). More »

London studio David Mikhail Architects has renovated a nineteenth-century house in London and added a glazed kitchen and dining room at the rear (+ slideshow). More »

UK firm Mole Architects extended a protected farmhouse in south-east England by adding an extension with a barrel-vaulted roof that references local agricultural buildings (+ slideshow). More »

More from architect Hironaka Ogawa: the two trees felled to make way for this house extension in Kagawa, Japan, were reinstalled inside the living room (+ slideshow). More »

London studio Bureau de Change has combined two terraced houses in London by punching through original walls and adding a glazed kitchen and a floating staircase (+ slideshow). More »

London studio alma-nac has staggered the floors of this extension to a 2.3 metre-wide terraced house in south London to help bring natural light in through a sloping roof. More »

Walls of books fold around a wooden staircase in this renovation and extension to a north London home by Hackney studio Platform 5 Architects. More »

French architect Emmanuelle Weiss has added a contrasting dark brick extension to a red brick house outside Lille (+ slideshow). More »

KHBT of London and Berlin has doubled the size a 1970s family house in Offenbach, Germany, by wrapping a timber-clad extension around the walls and over the roof (+ slideshow). More »

A simple uniform of Irish blue limestone dresses these four mono-pitched extensions to a rural cottage on the south coast of Ireland by London firm Niall McLaughlin Architects (+ slideshow). More »

Alison Brooks Architects has extended a nineteenth century house in north London by adding two tapered volumes that project into the garden (+ slideshow). More »

This rooftop house extension by Californian architects SFOSL has a metal bridge at its entrance and a facade that folds open. More »

Dutch studio BaksvanWengerden has added a splayed concrete extension to a triangular brick house in north Holland (+ slideshow). More »