Farmhouse

"It only cost about $48,000 to build, which was incredibly cheap," says Turner of the Stealth Barn. "We got the Timber Frame Company to supply the shell, then we clad it and fitted out the interior and windows ourselves. The idea was to take the archetypal black tar-painted agricultural building and make an almost childlike icon of that."

With a few small changes and regular maintenance, existing buildings are some of the most sustainable around.

The new custom kitchen is situated in the original structure. The window is a new commercial unit with an operable frameless center pane and was set so that the countertop could tuck right underneath it to create a 1/4-inch shadow line.

In this kitchen, an exposed brick wall stands out against the milky smoothness of the marble tile floors.