Austrian architects Winkler + Ruck Architekten and Ferdinand Certov have been selected to create a "floating" roof extension for Vienna's Wien Museum. More about "Floating" extension to be built over roof of Vienna's Wien Museum
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
Architects office McGonigle McGrath has been granted planning permission to transform a heritage-listed war memorial building in Belfast, Northern Ireland, into a boutique hotel. More about McGonigle McGrath to convert Belfast memorial building into boutique hotel
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
Herzog & de Meuron has completed an extension to the Musée Unterlinden in Colmar, France, creating a new underground gallery accessed via a monumental cast-concrete staircase (+ slideshow). More about Herzog & de Meuron creates subterranean gallery for Musée Unterlinden in Colmar
Studio 30 has transformed a terraced house in west London with a new loft bedroom and an enlarged family kitchen, both featuring walls that fold open to offer better views of a garden and nearby park (+ slideshow). More about London house remodelled by Studio 30 with loft bedroom and courtyard-inspired kitchen
A wooden boardwalk leads inside this timber-clad gym and spa building, designed by MacKay-Lyons Sweetapple Architects to accompany a residence on Nova Scotia's Atlantic coast (+ slideshow). More about MacKay-Lyons Sweetapple adds timber-clad spa to its House 22 in Nova Scotia
Curving vaults create a scalloped roofline for this red brick house extension completed by Barcelona studio Mesura in Alicante, Spain (+ slideshow). More about Mesura adds red brick extension with scalloped roofline to Alicante residence
A floor that doubles as a toy box and a vivid yellow bathtub both feature inside this remodelled Melbourne house by local studio Austin Maynard Architects (+ slideshow). More about Revamped Melbourne house hides a giant toy box under its floors
German studio Von M has completed a slatted timber building with a fragmented roofline to house a kindergarten in the German city of Ludwigsburg (+ slideshow). More about Alternating roofs break down scale of Von M's slatted timber kindergarten
Texas architecture firm AlterStudio has turned an Austin bungalow into a three-bedroom home with a black timber extension connected by a glass corridor (+ slideshow). More about AlterStudio adds black-stained angular extension to renovated 1920s bungalow in Texas
This wood-panelled extension by a pair of Swedish architecture studios echoes the design of the 19th-century villa that it adjoins (+ slideshow). More about Kod Arkitekter and General Architecture add wood-panelled extension to Swedish villa
Rem Koolhaas' firm has revealed plans to overhaul continental Europe's largest department store, with the addition of a glass rooftop extension and a series of sculptural new staircases (+ slideshow). More about OMA unveils major renovation plans for Berlin's KaDeWe department store
Work is set to begin on a trio of circular buildings designed by Henning Larsen Architects for a hospital in Denmark. More about Henning Larsen gets go-ahead for ring-shaped extensions to a Danish hospital
Buenos Aires studio Adamo-Faiden has refurbished a local 1970s townhouse and constructed a huge glazed enclosure at the back. More about Adamo-Faiden adds giant conservatory to updated Buenos Aires townhouse
This design centre in an extended 18th-century townhouse was created by Matador Architects as part of Mons' stint as European Capital of Culture last year (+ slideshow). More about Design centre by Matador Architects becomes a legacy project for Mons 2015
Australian studio Those Architects has overhauled a house in a beachside Sydney suburb, creating a spacious new living room featuring secret storage, concrete surfaces and a pivoting garden window (+ slideshow). More about Those Architects transforms small Sydney bungalow into spacious courtyard home
Montreal-based architecture firm Naturehumaine has transformed a modest house in the Quebec countryside into a family retreat near the Bic National Park. (+ slideshow) More about Le Bic House extension by Naturehumaine combines wood and steel panelling