This below grade structure blends within the hillside with a “green roof” as it collects water and drains into and incorporated water storage facility in its basement. Expressing the client’s passion for innovative construction and craft of concrete and steel fabrication, this small home is a hybrid of many sustainable features. Planting of native grasses on the rooftop that gently slopes back to the hillside “bury” views of the home from uphill neighbors. High thermal mass of thickened poured in place concrete walls with rigid insulation on the exterior optimize thermal performance in both heating and cooling seasons. The corner balcony facing south and southeast take advantage of what solar gain is available in this wooded site.