Energy efficient building design depends on the mediation and harvest of naturally occuring on-site energy flows for building use. A building’s attentiveness to site allows for this productive relationship between building and environment to develop.Early design decisions about form and orientation and thoughtfulness towards landscape integration allow for the appropriate adaptation of a building to its site and result in energy demand reduction and bottom line savings.The Navy Yard office complex, Parkway Towers, shares a site with a public park and will be an integral part of a quasi-urban work-live community. Design strategies aimed at minimizing energy demands from off-site are also focused around a commitment to positive impact on-site; to interaction with the sun, wind, water and soil; and to providing enjoyable public outdoor space. The experience of the building is one of the landscape. Extensive green roofs, daylighting, passive solar ventilation strategies, high performance building materials, integrated water management, grey-water reuse and photovoltaic energy harvesting all contribute to a low-impact building integrated with landscape which reduces off-site energy demand by 60% from a typical office building baseline.