Lofts

Inside, a custom wood-burning fireplace takes center stage in the main living room.

In the bathroom, the cast iron tub is a Paris flea market find, and the cement floor tiles were designed by Alix and made in Istanbul. “I love to use mosaic tiles in gradations of color,” she says.

A concrete staircase leads to a newly added mezzanine that contains Onur and Alix’s bathroom and a small sauna. A gloss-sealed MDF closet doubles as a headboard for the couple’s floating concrete bed. Behind the closet is the girls’ bedroom and bath.

Visiting a Manhattan apartment designed by Tim Seggerman is like sitting inside one of Nakashima’s cabinets, a metaphor realized most fully in an ingenious "library"—really a glorified cubby with a banded maple ceiling, conjured from a free space adjacent to the loft bed.

“The roof construction is the primary architectural expression of the house,” reads the project description on AGPS’s website. “Cantilevered by steel beams, the roof is pivoted from the front wall anchored by tension cables. Continuous glass windows are between the top of the house walls and the roof plane, emphasizing the flying roof.”

In the sprawling, double-height living room, a built-in bookshelf with a rolling library ladder sits below an open loft.