This south London house extension by Studio Octopi features a pre-cast concrete staircase that had to be craned into position.
More about Pre-cast concrete staircase forms centrepiece of basement extension by Studio Octopi
Simon Conder Associates has placed a prefabricated, black-stained timber extension on top of a former warehouse in east London, creating a new home for the designers whose studio occupies the old building. More about Black House is a duplex apartment above a converted Victorian warehouse in Hackney
Architecture studio LT2A has added a brick extension to a school near Lille, featuring an entrance sheltered by an anodised-aluminium canopy, and circular windows that provide glimpses of courtyard gardens. More about Lille school extension by LT2A features porthole-like windows and golden details
Jamie Fobert Architects has completed a cliffside extension to the Tate St Ives in Cornwall, southwest England, which includes an underground gallery, a rooftop garden and ceramic cladding that mirrors the hues of the sea. More about Jamie Fobert sinks Tate St Ives extension into Cornish cliff facing the Atlantic Ocean
This extension to the roof of a Brussels apartment block by local studio Notan Office features a fireplace that takes its cues from the work of modernist architect and designer Alvar Aalto. More about Alvar Aalto inspires orange blockwork fireplace in Notan Office's Brussels roof extension
Atelier Pierre Thibault has restored and enlarged an early 19th-century home in Montreal, creating two separate libraries and a writing studio overlooking a river. More about Atelier Pierre Thibault expands historic Montreal home to create writer's studio
Austin-based architect Tom Hurt has extended the back of a ranch house using a series of stacked units and wooden interiors to form a multi-storey living space. More about Tom Hurt attaches tiered white pods with plywood core to Austin house
Brooklyn-based Office of Architecture has completely gutted and expanded a local row house for an architect, jewellery designer and their two children. More about Office of Architecture includes rooftop bedroom suite in Brooklyn row house overhaul
Italian studio Pedevilla Architects has completed an extension to a traditional Alpine hotel, comprising a monolithic blackened-timber volume with windows that jut from the walls and roof to optimise mountain views. More about Pedevilla Architects adds angular blackened-larch extension to hotel in South Tyrol
A pointy black entrance building has been added to the historic dockyards of Chatham, England, as part of a major expansion of the local nautical museum – one of six projects in the running for this year's Stirling Prize. More about Baynes and Mitchell creates museum complex within historic buildings of Chatham Dockyard
A climbing wall, a study and a bedroom are all contained within this Brisbane house extension, designed by Phorm Architecture + Design to be reminiscent of a treehouse. More about Extremely pointed garden room features a treehouse-like design and a climbing wall
New York firm EL Studio has placed a contemporary box-shaped extension on top of this suburban home in Maryland to more than double its size. More about Cuboid extension by EL Studio sits atop a Maryland bungalow
William Tozer Associates has overhauled a Victorian terraced house in north London, introducing a white, modern living area that faces out onto a neighbouring brutalist estate. More about Revamped London house features white surfaces and concrete details that match a brutalist neighbour
Architecture studio Elding Oscarson has added a Corten steel extension to the Skissernas Museum in Lund, Sweden, designed to open the building up to the adjacent sculpture park. More about Elding Oscarson creates "slightly bent" weathering steel extension to Lund's Skissernas Museum
London studio Amin Taha Architects has updated a 1950s terraced house in the city's Bayswater neighbourhood, adding a basement level topped with a rugged concrete soffit and a lightwell set into a courtyard garden. More about Amin Taha Architects reconfigures London home around lightwells and a spiral staircase
Architecture studio Bergmeisterwolf has completed an extension to a house on the shores of Italy's Lake Garda, featuring glazed walls that disappear into the ground to open the living area up to the garden. More about Vertically sliding walls open Bergmeisterwolf's Italian villa extension to the garden
Steel mesh curtains can be lifted to offer glimpses of performances inside this traditional music centre designed by Office Kersten Geers David Van Severen for Muharraq Island in Bahrain. More about Office Kersten Geers David Van Severen drapes mesh curtains over Bahrain music centre
London firm Stanton Williams has renovated and extended the Musée d'arts de Nantes, adding a series of extensions including a monolithic structure wrapped in stone and translucent marble to the beaux-arts building. More about Stanton Williams completes renovation of beaux-arts museum in Nantes with stone and marble extension
The gothic-revival chapel at the University of Winchester, England, has been "returned to its former glory", following a renovation and extension by local architecture studio Design Engine. More about Glowing gold extension added to Winchester university chapel by Design Engine
Three stacked cuboids covered in strips of dark-stained wood form this extension to a 1930s house in Ljubljana by Slovenian firm OFIS Arhitekti. More about OFIS Architects extends Slovenian house with trio of stacked wooden boxes