Renewal and expansion of the built environment enables us to simultaneously improve our quality of life and the performance of the buildings we inhabit—more efficient, better indoor air quality, improved light, lower sound pollution, and more spacious. However, it also uses non-renewable resources and energy and emits greenhouse gasses. Making better use of the existing building stock and its individual components and designing new buildings to be easier to adapt and reuse can help limit the input of virgin material required and greenhouse gasses emitted now and in the future.