A large window wraps around one corner of this brickwork extension to a Victorian house in London by local office Cousins and Cousins (+ slideshow). More about London house extension by Cousins and Cousins has a window wrapping its corner
The upper storey of this brick extension to a mid-century home in north London by Lipton Plant Architects projects over the entrance to form a porch (+ slideshow). More about Lipton Plant Architects adds pale-brick extension to north London home
Pale wooden window frames contrast with the black-stained cedar facades of this extension to a detached house in Nantes by French studio Bertin Bichet Architectes (+ slideshow). More about Nantes house extension contrasts blackened wood facades with pale window frames
A glass-fronted stairwell joins a craggy stone Portuguese house to its new concrete extension by Filipe Pina + Maria Inês Costa (+ slideshow). More about Filipe Pina + Maria Inês Costa add concrete extension to stone house in Portugal
The steeply angled roofs of a wooden pavilion and extension by Bent Architects will screen a family home in Australia from a "monster" development on an adjoining plot of land (+ slideshow). More about Bent Architecture's wooden extension screens a Melbourne home from neighbouring "McMansion"
The street-facing elevation of this brick and steel extension to a 1920s Montreal property echoes the proportions of the original building, but at the rear a large angular outcrop projects over the back garden (+ slideshow). More about Steel cladding frames an offset window at Montreal house extension by Naturehumaine
Italian studio Massimo Galeotti Architetto has filled in the empty corner of a house in Treviso with a timber-clad extension to provide space for a new music room (+ slideshow). More about Massimo Galeotti adds modern timber infill to the corner of an old Italian villa
Atelier Data has extended a 1980s home in the Algarve, Portugal, with whitewashed concrete structures and fenced-in courtyards (+ slideshow). More about Atelier Data adds concrete volumes and internal courtyards to Algarve house
Two oversized sash-style windows have been added to the back of this two-storey extension by Sydney architects Panovscott, allowing both levels to open up completely to the garden (+ slideshow). More about Giant sash windows cover the back of Panovscott's Sydney house extension
A strip of glazing cuts through the middle of this two-storey extension to a Georgian property in west London, by Norton Ellis architects (+ slideshow). More about Norton Ellis extends Georgian basement flat with glass and brick "outhouses"
This gabled extension to a brick house in the Netherlands was designed by Studio Prototype to mimic the shape of the original property but is clad in an entirely different material. More about House W extension by Studio Prototype contrasts stripy cedar with original brickwork
This extension by French architect Clément Bacle mirrors the size and shape of the original brick house it adjoins, but uses modern materials to distinguish it as new (+ slideshow). More about House Between the Two extension by Clément Bacle mirrors original house
Eastabrook Architects and Jonathan Tuckey Design have added a contemporary glazed extension to a Grade II-listed Cotswolds house to provide additional space without detracting from the original building (+ slideshow). More about Eastabrook Architects and Jonathan Tuckey Design add glazed extension to Grade II-listed Yew Tree House
Gianni Botsford Architects has added a subtle extension to a London townhouse, which is partly submerged in the garden and has transparent walls to help camouflage it from sight (+ slideshow). More about Gianni Botsford sinks "invisible" extension into the garden of a London house
Architect Simon Astridge employed a varied material palette of plywood, concrete, brick and stone to create this extension to a Victorian terraced house in London (+ movie). More about Simon Astridge opts for a variety of raw materials in Balham House extension
Skylights at the apex of a sloping roof project light onto the brick internal walls of this extension to a bungalow in Sydney, by local studio Andrew Burges Architects (+ slideshow) More about High-level windows funnel daylight into Skylight House extension by Andrew Burges
Belgian firm ADN Architectures gave this wooden house extension in Brussels a V-shaped roofline that inverts the pointed gables of the existing property (+ slideshow). More about ADN Architectures adds V-shaped extension to Brussels bungalow
Japanese firm Suppose Design Office has replaced the roof of a 35-year-old family house, creating a lofty new living room that opens to the garden at both ends (+ slideshow). More about Suppose Design Office adds double-height dining room to House in Chiba
This London house extension by Tigg Coll Architects features sliding glass doors that retract into the brick walls to open the space up to the garden (+ slideshow). More about Glazing disappears into the walls of Tigg Coll's Malbrook Road extension
Jonathan Tuckey Design has refurbished the interior of a semi-detached house in London and added a dining room extension with a latticed wooden ceiling (+ slideshow). More about Doyle Gardens extension by Jonathan Tuckey features a criss-crossing wooden ceiling