Paris studio Atelier Zündel Cristea has added a glass-walled extension that projects from the rear of this hundred-year-old house in the Vincennes suburb (+ slideshow). More about Maison a Vincennes by Atelier Zündel Cristea features glass-walled extension
Dublin practice GKMP Architects has added two tiny extensions to a nineteenth century terraced house in the city, one of which incorporates a wooden window seat looking out onto the garden. More about House extension by GKMP Architects includes a wooden window seat
Melbourne practice Architecture Architecture has altered the orientation of a house in the Australian city so the main living areas get the best of the northern sunlight (+ slideshow). More about Renovated house turned around to face the sun by Architecture Architecture
Diagonal strips of wood clad the exterior of this annexe that Austrian studio Franz Architekten has added to a house in the suburbs of Vienna to make room for extra family members (+ slideshow). More about Family house extension by Franz Architekten clad with diagonal strips of larch
Belgian studio Atelier Tom Vanhee has converted a former school building in the village of Woesten into a community centre and added a white gabled extension that appears to be sliding out of the original brick facade (+ slideshow). More about Community Centre Woesten by Atelier Tom Vanhee has a contrasting gabled extension
London studio Hayhurst and Co used pale white larch to wrap walls and furnishings both inside and outside this beach house-inspired extension to a family residence in Hampstead, north London. More about Hayhurst and Co adds beach house-inspired extension to London residence
London studio Scott Architects has added a curvy timber extension to a terraced house in Hackney, featuring a bowed wall that cuts through the centre of a green roof (+ slideshow). More about Curvy timber extension by Scott Architects features a sloping grass roof
Webs of red parachute cables take the place of traditional balustrades between the two levels of this office that architects Joe Fraher and Lizzie Webster have built as an extension of their London home (+ slideshow). More about Parachute cables form netted balustrades at Fraher Architects' London studio
A faceted roof made from a shimmering copper-bronze alloy covers this extension by British firm Emrys Architects to a pair of Georgian townhouses in London (+ slideshow). More about Office extension with a faceted copper roof by Emrys Architects
Paris studio Marchi Architectes layered up timber slats of different thicknesses and proportions to give an irregular texture to the walls of this sunken house extension in Normandy, France (+ slideshow). More about Blackened timber house extension hidden in the forest by Marchi Architectes
Berlin practice Sauerbruch Hutton has renovated and extended a former Prussian military uniform factory to accommodate its own offices and an artist's studio. More about Offices and a studio in a renovated military uniform factory by Sauerbruch Hutton
Israeli studio SO Architecture added this auditorium and gallery to a hilltop war memorial in Nesher, Israel, and tilted it upwards so that it faces towards the sky (+ slideshow). More about Nesher Memorial auditorium and gallery by SO Architecture
This extension to a woodland home in Ontario by Canadian studio UUfie features charred cedar walls and a mirrored entrance (+ slideshow). More about Lake Cottage with mirrored entrance by UUfie
London studio Denizen Works has overhauled a cottage in Scotland's Outer Hebrides by rebuilding the original structure and adding two extensions modelled on agricultural sheds (+ slideshow). More about House No.7 cottage and extensions on the Isle of Tiree by Denizen Works
A twisted angular roof oversails this extension to a suburban house in Melbourne by Australian architects March Studio (+ slideshow). More about Mullet House by March Studio
Dutch Design Week 2013: Dutch firm Bierman Henket architecten has added an extension shaped like a rugby ball on top of a neo-classical museum in the city of Zwolle (+ slideshow). More about Museum De Fundatie by Bierman Henket architecten
Small attic spaces are tucked between the ribs of a triangular roof at this house extension in Japan by mA-style Architects (+ slideshow). More about Koya No Sumika by mA-style Architects
Studio Webb has added a zinc-clad roof extension to a private school in south London, which sets off against the building's existing brickwork (+ slideshow). More about Classroom extension by Studio Webb
Ghent studio Open Y Office has extended a house in Belgium, adding a concrete structure that could also function as a standalone residence (+ slideshow). More about House Wiva by Open Y Office
This steel and glass restaurant extension by Austrian studio Architekten Rüf Stasi Partner juts out over the edge of Karren Mountain in the Austrian Alps (+ slideshow + photographs by Zooey Braun). More about Panoramarestaurant Karren by Architekten Rüf Stasi Partner