Images of the penthouse at Japanese architect Tadao Ando's residential complex in New York City have been released, showing large rooftop terraces and an internal spiral staircase. More about Duplex penthouse with expansive roof terraces tops Tadao Ando's 152 Elizabeth Street
Tech billionaire Bill Gates has invested in a huge patch of land west of Phoenix, Arizona, with the intention of building a new smart city. More about Bill Gates plans smart city in Arizona desert
British architect Norman Foster has criticised postmodern architecture for not being serious enough, but believes important examples like Philip Johnson's AT&T Building in New York should still be preserved. More about Some cartoonish postmodern buildings are worth saving, says Norman Foster
American design firm Studio O+A has created an office in San Francisco that communicates "new ways of thinking and working" for a major financial services company. More about Studio O+A teams traditional and contemporary elements for San Francisco finance office
Minimal fashion brand The Arrivals has opened pop-up stores in New York, Los Angeles and San Francisco, where designers Bower and Lotte Van Velzen have used metallic and russet surfaces to match the colour palette of this season's collection. More about The Arrivals opens "alien" fashion retail spaces in three US cities
Utah firm Imbue Design has designed various outdoor living spaces, including a protected courtyard and a wrap-around deck, for a family home in Park City. More about Imbue Design builds Red Hawk Residence in Utah around a courtyard
Red and grey tones run through the rammed earth walls that US firm Feldman Architecture has used to build this retreat on a farm in California's Central Valley. More about Stripy rammed-earth walls curve through holiday home on Californian walnut farm
Removing interior walls and expanding the roofline of this bungalow in Austin, Texas, allowed Murray Legge Architecture to create a light-filled living space for a local newspaper editor and her family. More about New roof and clerestories bring light into renovated Texas bungalow by Murray Legge Architecture
Mexican architecture studio Productora has attached a two-storey steel unit onto the back of a bungalow in California to add more living space. More about Productora adds steel-frame extension to pink bungalow in Los Angeles
The Calvin Klein flagship on New York's Madison Avenue has gone from "minimal to maximal", with a bright yellow makeover forming the backdrop for artworks celebrating Americana. More about Raf Simons and Sterling Ruby transform Calvin Klein store with yellow scaffolding
WeWork is continuing its expansion beyond coworking with a kindergarten called WeGrow, which will be designed by Danish architecture firm BIG in New York City. More about BIG designs kindergarten in New York City for WeWork
Filmmaker Nathan Eddy has released a movie showcasing architect Helmut Jahn's James R Thompson Center in Chicago, in a bid to protect the postmodern government building from demolition. More about Movie protests demolition of Helmut Jahn's Thompson Center in Chicago
Uber has partnered with NASA to develop an on-demand electric aircraft taxi service, which is scheduled to begin flights in Los Angeles in three years time. More about Uber and NASA to launch flying taxi service by 2020
A glazed stairwell brings light from a roof window down through this narrow townhouse in Brooklyn, renovated by New York studio GRT Architects with splashes of colour. More about GRT Architects creates fluted glass stairwell for skinny Brooklyn townhouse
Indigo walls and furniture form dining areas for this Japanese restaurant in Midtown Manhattan, while geometric-patterned wall surfaces match the menus and tableware. More about "Tokyo meets New York" in dark-coloured ramen restaurant by Carpenter + Mason
Concrete walls that once enclosed horse stalls are now used as room dividers in this modern guest house by The Construction Zone, a design-build firm in Phoenix. More about Arizona horse barn transformed into desert guest house by The Construction Zone
New York jewellers Tiffany & Co has created a line of everyday items re-imagined in expensive materials, including a gold and silver tin can and a ball of yarn recreated in handspun silver for £6,840. More about Tiffany & Co releases £945 tin can as part of Everyday Objects collection
Brooklyn studio DJDS has redesigned the interior of a loft apartment in Lower Manhattan, using white, black, brass and wood surfaces throughout. More about Hanging staircase divides spacious New York loft design by DJDS
A steel-framed building in Fayetteville, Arkansas, has been transformed into an educational facility with the addition of white cladding, tall linear windows and a second floor. More about El Dorado and Modus Studio repurpose old warehouse for Arkansas art school
David Zwirner Gallery is showing concurrent exhibitions of work by Japanese artist Yayoi Kusama, including her iconic fully-mirrored rooms and spotty spaces, in New York's Chelsea. More about Yayoi Kusama's Infinity Mirror Rooms and polka-dot installations come to New York City