Architectural pioneers Mark Schatz and Anne Eamon built their own 700-square-foot house with a curved roof in Houston, Texas. The pair bought a small sheet of copper, cut out their house numbers, mixed and poured some concrete, and voilá—their own groovy house numbers for $125. Photo by Misty Keasler. Photo by Misty Keasler. This originally appeared in Small Amidst Sprawl.