At the same time, roughly one billion square feet of buildings are demolished and replaced every year in the United States. According to an analysis by the Brookings Institution, the country is in the midst of demolishing and replacing 82 billion square feet of existing space — nearly a quarter of the existing building stock — by 2030.
That is an astonishing amount of waste. In fact, the energy used to demolish and rebuild that much space could power the entire state of California for a decade! According to a formula produced for the Advisory Council on Historic Preservation, about 80 billion British thermal units (Btus) of energy are embodied in a typical 50,000-square-foot commercial building.