Belgian studio Atelier Tom Vanhee has added two offset gabled volumes onto the side of an existing brick structure near the village of Aartrijke to turn it into a modern home (+ slideshow). More about Atelier Tom Vanhee adds pair of gabled extensions to brick farmhouse in Belgium
Local architecture firm Studio Octopi added this brick and glass extension to a Victorian terrace in west London to improve the connection between the property's reconfigured interior and garden (+ slideshow). More about Studio Octopi adds glass-fronted extension to White Lodge house in London
Architecture studio Hayhurst and Co has built a home and studio for leading leather-design duo Whitaker Malem, featuring a steeply stepped roof covered in over 800 plants (+ slideshow). More about Hayhurst and Co creates "hanging-basket roof" for designers' home and studio
Australian architect Matt Gibson used zinc cladding to distinguish this faceted structure from the Edwardian residence it extends (+ movie). More about Matt Gibson's faceted Shadow House extends an Edwardian home in Melbourne
This extension to a Swiss art museum by Spanish studio Barozzi Veiga features gridded concrete facades and subterranean galleries (+ slideshow). More about Barozzi Veiga adds gridded concrete extension to Bündner Kunstmuseum
Architecture studio Selencky Parsons has extended a typical midcentury end-of-terrace house in southeast London by adding a pair of brick gables that diminish in size like Russian dolls (+ slideshow). More about Selencky Parsons adds stepped extension to 1960s terraced house in London
Kirkwood McCarthy has added a black zinc-clad wing to the rear of a London house, creating a light-filled living space that sits between the garden and a new courtyard. More about Kirkwood McCarthy adds zinc-clad garden wing to north London house
Local firm FABG has made major improvements to the Musée d'art de Joliette outside Montreal, restoring the original building and adding three new volumes to the museum (+ slideshow). More about FABG renovates and expands Quebec's Musée d'art de Joliette
Porto studio NPS Arquitectos has renovated a pair of matching townhouses and added a contemporary linking building to create a new headquarters for the Portuguese Architectural Association (+ slideshow). More about Portuguese Architectural Association takes over two revamped townhouses
Panes of transparent and translucent glass create a gridded facade for this photography museum in Albania by Dutch studio Casanova + Hernandez Architects (+ slideshow). More about Albanian photography museum by Casanova + Hernandez features gridded glass walls
Australian architect Christopher Polly has added an asymmetric extension to an early 20th-century house in Sydney, creating a bright double-height living space filled with Modernist furniture (+ slideshow). More about Wedge-shaped reading and sleeping nooks feature in Christopher Polly's Sydney extension
Fraher Architects has added a simple extension with a sloping glass roof to an early 19th-century house in London, creating a bright new dining area that opens onto a garden patio (+ slideshow). More about Fraher Architects adds glass-roofed extension to terraced house in London
Tate Modern has released a time-lapse movie showing the building of Herzog & de Meuron's Switch House extension, which has already attracted record visitor numbers (+ movie). More about Tate Modern releases movie showing construction of Herzog & de Meuron's extension
These new images by British photographer Jim Stephenson offer a look around Herzog & de Meuron's extension to Tate Modern in London, which officially opened on Friday (+ slideshow). More about Tate Modern Switch House by Herzog & de Meuron opens to the public
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 about Traditional farmhouse in Austria updated with contemporary extension
A 1960s-inspired window wall fronts this extension to a psychiatric institute in Paris by Local firm Atelier 2+1 (+ slideshow). More about Atelier 2+1 adds glazed extension to Parisian psychiatric hospital
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 about Tate Modern releases first images of Herzog & de Meuron's Switch House extension
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 about Pastel blue tiles front gabled extension to a Melbourne house by Dan Gayfer Design
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 about Alma-nac creates huge pivoting door for London house extension
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