Conserves Resources
In January 2012 the Preservation Green Lab, a project of the National Trust for Historic Preservation, released The Greenest Building: Quantifying the Environmental Value of Building Reuse, which found that in almost every case, the reuse of existing buildings results in fewer environmental impacts over their life spans compared to demolition and new construction. Conserving buildings prevents demolition waste from entering landfills and reduces sprawl by encouraging the revitalization of our existing communities. Further, historic buildings are often more energy efficient than more contemporary buildings due to careful siting choices and the use of passive heating and cooling systems.
The Greenest Building: Quantifying the Environmental Value of Building Reuse