Williamsburg Passivhaus Corten Steel Facade Architecture, Engineering, Passive House This Passive House building in Williamsburg, Brooklyn, was a collaborative effort with Knoxville based Pentagon Memorial designers KBAS and will feature a hanging corten steel façade system fabricated in Long Island, NY. This Passive House building in Williamsburg, Brooklyn, was a collaborative effort with Knoxville based Pentagon Memorial designers KBAS and will feature a hanging corten steel façade system fabricated in Long Island, NY.