This one is the real deal — a sustainable home that actually looks the part, the Prius of green architecture (or maybe the biodiesel-converted Mercedes?). This is a hyper-insulated dome, passive solar (hard to imagine how that works, given the ratio of wall to window — there should be a whole lot of south-facing windows), made from timber cleared on the property itself, radiant heat floors (to die for), no-VOC paint. It’s also, as they point out, disaster-proof — should survive the next Irene or terrorist attack. The kitchen looks nice, including the dome-shaped cutout in the cabinet. Too kooky for my taste, but I can tell you from spending time in Earthships that being among rounded walls has a surprisingly soothing effect. There’s a swimming hole and a stream, and it abuts thousands of acres of state land. Annual utilities are $1,500, pretty good for more than 3,000 square feet of space. Certainly this place would be a serious respite from the city. Here’s the big question mark: What does 80% complete mean? Stats on the jump.