Architect Eli Attia’s vision for eco-friendly homes will spin you right roundhouse, baby. Well, sort of. (Technically, they’re 64-sided polygons, but that’s splitting hairs.) Attia says the homes ( will be 30 to 50 percent more energy efficient than their boxy brethren.

Why round? Round is thought to be the most efficient form in the universe. It encloses the largest area in the smallest footprint. It has between 30and 50 percent less [of an] exterior wall. Exterior walls are where heat is gained in the summertime and lost in the wintertime.

You’reworking on the first house, a 15,000-squarefoot project in Beverly Hills. It was test-listed with a real estate firm for $16.5 million. Are the houses only for the rich? The roundhouse system is scalable to anywhere. It can even be built for extremely modest means. Actually, it is being considered for implementation in New Orleans.

Why did you choose steel, glass, and concrete as your building materials? On average, every house built of wood requires a clearing of about one acre of forest. [Roundhouse] is built of totally recyclable materials. It is durable and sustainable. It doesn’t rot. It’s not combustible. You don’t need to paint it. It requires barely any upkeep. When you want the house to look sparkling clean, you just hose it.