Cosgriff House by Christopher Polly
Australian architect Christopher Polly has converted a small Sydney bungalow into a two-storey house by adding extra rooms behind and underneath. More
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Pedervegen 8 by Rever & Drage
This timber-clad house extension in Norway by Oslo studio Rever & Drage features curvy towers that point outwards like periscopes (+ slideshow). More
House N by Maxwan
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
East London House by Mikhail Riches
London studio Mikhail Riches has renovated a nineteenth-century house in London and added a glazed kitchen and dining room at the rear (+ slideshow). More
Hawthbush extension by Mole Architects
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
Garden Tree House by Hironaka Ogawa
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
HomeMade by Bureau de Change
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
Slim House extension by Alma-nac
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
Book Tower House by Platform 5 Architects
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
Maison D by Emmanuelle Weiss
French architect Emmanuelle Weiss has added a contrasting dark brick extension to a red brick house outside Lille (+ slideshow). More
Haus Bergé by KHBT
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
House at Goleen by Niall McLaughlin Architects
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
Residential Extension by Alison Brooks Architects
Alison Brooks Architects has extended a nineteenth century house in north London by adding two tapered volumes that project into the garden (+ slideshow). More
20th Street Residence by SFOSL
This rooftop house extension by Californian architects SFOSL has a metal bridge at its entrance and a facade that folds open. More
SH House by BaksvanWengerden
Dutch studio BaksvanWengerden has added a splayed concrete extension to a triangular brick house in north Holland (+ slideshow). More
Sunset Villa by TT Architects
A covered courtyard has been inserted into the side of this Kurashiki house by Japanese firm TT Architects (+ slideshow). More
Une Maison sur la Maison by THE Architectes
A mysterious black gable frames two new bedrooms on the roof of a house in the outskirts of Paris. More
The Orangery by Liddicoat & Goldhill
London architects Liddicoat & Goldhill added an extension to a south London home with an oak-screened staircase and double-height windows. More
Villa SK by Atelier Thomas Pucher
Austrian architects Atelier Thomas Pucher built a glass box and courtyard onto this house in Graz to bring the family's living space outdoors (+ slideshow). More
Eden House by The Practice of Everyday Design
A chunky bay window protrudes from this timber-clad addition to a house in Ontario by Canadian studio The Practice of Everyday Design (+ slideshow). More