Hammerschmid Pachl Seebacher Architekten has added a contemporary extension to a traditional farmhouse in Austria, featuring rough-sawn spruce cladding and a folded fibre-cement roof (+ slideshow). More
A 1960s-inspired window wall fronts this extension to a psychiatric institute in Paris by Local firm Atelier 2+1 (+ slideshow). More
This set of images by photographer Iwan Baan provides a first look inside Herzog & de Meuron's extension to the Tate Modern art gallery, set to open next month in London (+ slideshow). More
This tall, gabled extension is tucked behind the Victorian frontage of a mid-terrace house in Melbourne's Fitzroy North suburb, and its exterior is clad in pale blue tiles (+ slideshow). More
A three-metre-high pivoting glass door protrudes from the sloping roof of this London house extension, which is clad in fibre-cement panels to match a refurbished dormer window (+ slideshow). More
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
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
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
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
Spanish studio H Arquitectes has renovated and extended a tired mid-century school building in Catalonia, adding a new facade of concrete blocks and slatted screens (+ slideshow). More
Nordic firm AART has won a competition to extend the Viking Age Museum building in Oslo, with plans to add a new curving wing to the cruciform plan (+ slideshow). More
Bennetts Associates has extended a historic theatre in London's West End, adding a serrated box made from weathering steel on top of the roof (+ slideshow). More
GKMP Architects has extended a 1930s residence in Dublin, Ireland, using the same material palette – which even includes pebbledash. More
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
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
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
Architecture studio Tengbom has added a zinc-clad extension to a traditional brick courthouse building in the Swedish town of Alingsås (+ slideshow). More
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
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
A faceted golden nodule protrudes from one side of this art studio in Warsaw, providing a secluded meditation space for Polish sculptor Pawel Althamer (+ slideshow). More