Building Life Expectancy: The life expectancy of the building has a large impact on the results of the LCA. Buildings with large lifespans will have proportionally lower impacts in the construction stages and higher impacts due to operation. The difficulties (and costs) in demolishing the 20-storey building would be challenging for someone looking to re-develop the site in the future, combined with the high density of people likely to be using the space implies the re-development potential is low. The building may be likely to remain operational well beyond the current 60 year Green Star default assumption.
Posted in: Life Cycle Design vs Green Building Rating