A curtain made of cut sheet steel by Chicago sculptor Mary Brogger hangs in the living room. The knotty-pine bookshelves were designed by Robertson and Ripple Design. The stacked plywood boxes and powder-coated steel spacers allow light to pass through the shelves. On the left is a fireplace faced in the same hand-troweled concrete as the façade; owner Jan Horn likens it to a miniature house. “I love that little building,” he says.  Courtyard House by David A. Greene