David Vandervort Architects The walls are standard drywall construction. It requires a special detail (a rabetted wood piece that gets blended flush with the drywall) and a detail oriented builder to pull off this no base design. It is somewhat expensive so, on this house, it was limited to significant walls such as this one.
Jim Peterson I agree, looks like polished concrete. Here is more information and a photo gallery with 100's of polished floors from concretenetowrk.com:
http://www.concretenetwork.com/concrete/polishing/
Economical. The cost of concrete floors is very low, about $2 to $6 per square foot to polish a plain gray slab, giving it a lustrous sheen. The concrete's tonal differences, subtle cracks and aggregates take on a stonelike, natural feel.
Some black from the exterior is carried through to the interior (wood wall on the left and window frames), but this house is another example where white and light prevail.
Some black from the exterior is carried through to the interior (wood wall on the left and window frames), but this house is another example where white and light prevail.