A triangular lightwell covered in scale-like shingles extends from the roof of this living room that architect Nuno Melo Sousa has added to a house in Penafiel, Portugal (+ slideshow). More about Nuno Melo Sousa uses a wedge-shaped lightwell to bring light into a courtyard living room
Irish studio NOJI Architects experimented with plywood to create the three different kinds of structure that frame this extension to a terraced house in Dublin. More about Plywood frames create a pattern of triangles inside house extension by NOJI Architects
Forming a new end to a 1960s housing estate in London, this timber-framed house extension was designed to look contemporary but also to match the aesthetic of the original block (+ slideshow). More about Maccreanor Lavington extends a 1960s London housing estate with a modern interpretation
Architects Tom and James Teatum have reshuffled the upper-floor layout of two houses in west London to create a pair of double-fronted flats – one spread across the second floor and another squeezed beneath the newly extended rafters (+ slideshow). More about Teatum+Teatum squeezes a new flat into the top of two Victorian homes
Architecture studio Sevil Peach has overhauled a house once owned by Victorian painter and illustrator Frederick Barnard to create an artist's residence boasting period features and a patio-side bathtub. More about Home of Charles Dickens illustrator converted by Sevil Peach into an artist's studio
This metal-framed extension to a clapboard house near Melbourne was left intentionally incomplete by architect Andrew Maynard to show off the "beautiful skeleton" of an unfinished building (+ slideshow). More about Andrew Maynard adds greenhouse-like extension to a Melbourne home – but leaves it unfinished
Architecture studio Lipton Plant has turned a small space at the side of a Victorian house in north London into the glazed entrance for a basement extension focused around an oak staircase (+ slideshow). More about Lipton Plant creates a nanny flat underneath a London home
Hexagonal slate tiles cover this extension to a west London home designed by architects Christian Ducker and Tyeth Gundry to create a bright and spacious new kitchen (+ slideshow). More about Gundry and Ducker's Slate House is an extension clad with hexagonal tiles
This rust-coloured copper home extension by British studio Poulsom Middlehurst sits above the red-brick walls and clay-tiled roof of a Victorian terrace in east London. More about Poulsom Middlehurst adds copper-clad extension to east London attic flat
Architect Jochen Specht has doubled the size of a 1960s house in rural Austria by encasing its stone walls behind a new facade made up of dark timber, concrete and plenty of windows (+ slideshow). More about Jochen Specht envelops a 1960s house in a new timber and concrete facade
A curving copper-clad extension punctuated by portholes has been added to a house in Ghent, Belgium, by local studio Atelier Vens Vanbelle, who describe the structure as "a cocktail of science fiction and nostalgia" (+ slideshow). More about Atelier Vens Vanbelle adds "retro-futuristic capsule" to a Belgian home
Wooden walls concertina across open-plan living areas to subdivide this renovated stone house and extension by Spanish office XLMS (+ slideshow). More about XLMS extends 19th-century stone house in Mallorca to create a holiday home
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Australian studio Philip Stejskal Architecture has equipped a white timber extension to a 1890s duplex with shutters and sliding panels that camouflage with the walls when closed. More about House by Philip Stejskal can be "locked down" with shutters that blend into the facade
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