The sloping roofline of an old extension to a London residence is surrounded by the pale brickwork of its replacement, designed by local studio Tsuruta Architects (+ slideshow). More
This blackened plywood box added by architect Antonin Ziegler to one end of a rural home on France's northern coast provides a private library and garage for its inhabitants (+ slideshow). More
A sloped section of roof joins this timber-clad extension by Melbourne studio Julie Firkin Architects to the adjacent weatherboard house (+ slideshow). More
Slender batons of untreated larch cover two extensions erected in the garden of this semi-detached home in London, as part of a refurbishment and remodelling by architecture studio Haptic (+ slideshow). More
A cylindrical tower clad in weathered steel forms part of this extension to a 19th-century stone cottage in the English countryside, designed to recall a gasworks that previously stood on the site. More
The residents of a house in Melbourne have allowed architect Andrew Maynard to reveal their living spaces to passers-by, with a timber-framed extension that slots into the perimeter fence (+ slideshow). More
A living room is contained within this glazed extension to a period property in Dublin, forming a transparent connection between the existing building and its garden. More
A small extension to the rear of this remodelled townhouse in Dublin is clad and roofed in panels of opaque black glass, designed by architectural studio Ailtireacht to reflect the building's surroundings. More
Australian studio Mihaly Slocombe has returned to a Melbourne home it completed almost a decade ago to add a timber nursery annex patterned with circular cutouts (+ slideshow). More
This red-painted timber-clad extension was added to the rear of an old stone farmhouse in Portugal, framing a new courtyard at the centre of the family home (+ slideshow). More
This extension to a Victorian house in London features a decorative wooden ceiling, exposed brickwork and a dining space that opens out to a garden filled with bushy plants (+ slideshow). More
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
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
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
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
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
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
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
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
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