Sleeping nooks that look like the grooves in a block of cheese.

A passage between the walls for hide and seek.

Despite the cast-on-site concrete dividers, there's still an airy sense of space; the dividers support, instead of overwhelm. This approach came from the architects' constant sense of experimentation and playfulness, a deliberate approach that helped them find new ways to use recycled and salvaged materials.

"It was supposed to be as naked as possible," says Alexandru Popescu, one of the members of R3Architetti who helped design and build the 3 Vaults apartment. "The furniture is absolutely included in the architecture; it’s more like an indoor landscape instead of a typical open plan." The kitchen exemplifies their approach, with textured concrete walls contrasting with wood panels and salvaged industrial lighting. The table, custom built by R3Architetti, is made in part from pipes procured from one of their fathers, a plumber.

This living/bedroom space showcases neutral tones and shades of white to contrast the continued use of natural, treated wood surfaces.

The original home’s second floor had three bedrooms with flat ceilings. Arch11 quickly realized there was a great volume in the upper floors at the gable ends of the home and chose to integrate the attic space into the second floor. This design move allowed the interior to be informed in part by the exterior while creating a bright, serene living space among the treetops.

Thanks to the extension’s vaulted ceiling, the master bedroom and minimalist staircase have views of the sky. Polly admits to having sacrificed floor area so that the full-height stairwell could achieve a stronger connection with the outdoors. Toyo Ito Mayhuma pendants hang from the ceiling, accentuating the space’s dramatic height.

House O, designed by Jun Igarashi, forgoes hallways and interior doors in favor of casually interconnected rooms.

Situated behind the kitchen, the lower level bathroom is equally suited to cleaning up before a meal or taking a leisurely bath. Crisp white fixtures, including a Kaldewei Centro Duo bath, ensure that the bathroom feels as light and airy as the rest of the house.

In one of the three bedrooms, Wright designed a built-in desk and graphic chair. The angular windows and skylights are continued into the bedrooms.

Designed by Belgium architectural studio OYO Architects, this 1,883-square-foot family residence in Maldegem, East Flanders, was conceived with a single green roof that meets the grass at ground level. The concrete base of the structure supports a lightweight timber frame, which was assembled in a local warehouse before being mounted on site. Different plants are grown on the green roof throughout the seasons.