Sustainability
Sustainability is a crucial consideration in any kind of planning.
Reusing or continuing to use old buildings is an environmentally sustainable practice, as it keeps materials out of the landfills and saves the environmental cost of producing new ones.
For heritage planning purposes, sustainability also refers to the ability of a project to survive in the long term. This is dependent not only on its ongoing financial security, and, if a building, its physical state, but also on the availability of people willing and able to carry the project forward in the long term.