A hole in the roof of this timber-clad house extension in Sydney reveals the location of a secluded courtyard. More about Cutaway Roof House by Scale Architecture has a courtyard sliced out of one side
Architect Sean Griffiths has unveiled plans to add a shed-inspired roof extension to the Blue House, one of the best-known projects of his former studio FAT. More about FAT's seminal Blue House set for rooftop extension
Local studio Naturehumaine has created an angular addition to a historic dwelling in Montreal, featuring dark zinc cladding that references works created by the owner, a graphite pencil artist (+ slideshow). More about Naturehumaine adds zinc-clad extension to 19th-century home in Montreal
Link Arkitektur has added a gabled extension to a 19th-century Norwegian farmhouse, featuring a wooden facade designed to age with the building (+ slideshow). More about Link Arkitektur extends Norwegian farmhouse with contemporary gabled structure
Australian firm CM Studio has added a pair of white-painted extensions to an end-of-terrace house in Sydney dating back to the 1880s, and remodelled its interiors with grey marble and pale timber finishes (+ slideshow). More about CM Studio updates 19th-century workers' cottage in Sydney with slatted timber extension
GKMP Architects has extended a 1930s residence in Dublin, Ireland, using the same material palette – which even includes pebbledash. More about GKMP Architects uses pebbledash, brick and slate for Dublin house extension
London architecture studio Platform 5 has added a cranked extension to a Victorian house in Hackney, featuring a herringbone-patterned dining table that matches the parquet flooring. More about Herringbone patterns feature inside angular house extension by Platform 5
Architect Phillip Lühl has added a pair of extensions to a Modernist house in Namibia, using cement brickwork textured with the coarse fibres of hessian fabric (+ slideshow). More about Phillip Lühl uses "bagged concrete bricks" to build two extensions to a Namibia house
Global Architects has transformed the interior of a 1980s Dutch residence, by inserting a house-shaped volume that provides cosy bedrooms and secluded bathrooms (+ slideshow). More about Global Architects builds house-shaped volume inside 1980s Dutch residence
US firm Barker Freeman Design Office has renovated a slender brick row house in Brooklyn and added a two-storey extension with a glass wall overlooking a garden (+ slideshow). More about Barker Freeman overhauls narrow Brooklyn row house for a family of four
Argentinian studio Adamo-Faiden has built a greenhouse-like structure over the top of a Buenos Aires residence, in its continuing bid to make better use of the city's vacant rooftops. More about Adamo-Faiden's rooftop extension proposes a "new idea of luxury" for Buenos Aires housing
A growing thirst for contemporary design is transforming the market for house extensions in London, according to architects working in the city (+ slideshow). More about Londoners' "tastes have improved" say architects as home-extension market explodes
Melbourne architecture office Taylor Knights has renovated an existing Federation-style house in the city and added a contrasting contemporary extension that opens directly onto the rear garden (+ movie). More about Taylor Knights adds modern rear extension to a traditional Melbourne house
Materials and interior details are used to clearly define the old and new parts of this family home in Windsor, UK, renovated by London studio TDO (+ slideshow). More about TDO adds boxy plywood-framed extension to old Windsor cottage
Lisbon architecture office Cais has renovated and extended an outdated house in the city, preserving its existing facade and creating an open-plan interior that extends into a new terraced garden at the rear (+ slideshow). More about Renovated Lisbon house by Cais conceals modern interior behind traditional facade
Architect William Tozer applied Adolf Loos' Raumplan concept to this London house extension, which features several stepped levels that are all visually connected. More about William Tozer's split-level Raumplan House is based on the theories of Adolf Loos
Architecture studio Freadman White has remodelled a 1930s Melbourne house that was extended in the 1970s, and created a new room featuring an angular roof (+ slideshow). More about Freadman White creates new layout for extended 1930s house in Melbourne
London office Studio Octopi has returned to a house it renovated over five years ago to add a loft extension, creating a study and a reading room connected by a perforated steel staircase (+ slideshow). More about Studio Octopi adds plywood-lined loft extension to RCA professor's house
Architecture studio Denizen Works has remodelled a north London house, transforming the "small dark bachelor pad" into a family home with a light-filled kitchen and dining space. More about North London house extension by Denizen Works creates a light-filled family kitchen
A corridor framed by reclaimed bricks and glass separates this Melbourne house from a new extension built in the back garden by local architecture firm MODO (+ slideshow). More about Glazed "tunnel" separates old from new at Melbourne house extended by MODO