The goal, a new two-level home that could score as high as reasonable in the “GreenPoint Rated System”. The owners de-constructed their existing home when they realized that any single-story design would completely eliminate their back yard. In respect of the neighbors, a partially-submerged lower level was designed with a pulled-back floor plate to create a light-filled atrium. In conjunction with the mechanical engineer, Klopf designed a net-zero energy home featuring insulated concrete forms, structural insulated panels, high-performance windows, cementitious siding and a solar photovoltaic system sized to cover all the energy usage. The new open and light house offers a connection to nature while maintaining privacy.