In the living area of the New York town house where Fractal Construc--tion’s Ulises Liceaga lives, 1970’s sofas by Ueli Berger, Eleonore Peduzzi-Riza, Heinz Ulrich, and Klaus Vogt encircle a leather rug and design books stacked to serve as a cocktail table. Glass in the steel-framed windows and sliding doors is embedded with dimmable LEDs. Photography by Eric Laignel