In our Project we have an underground floor with retail program that has a larger projection that the ground floor which is also retail.
The underground floor area is the same as the LEED boundary area.
How should I consider the building footprint? Do I consider the footprint of the ground floor or the footprint of the underground floor?
In case of considering the footprint of the underground floor, how can I calculate the open space and hardscape areas outside the building footprint located in the ground level?