Adaptive Reuse

We're working on the adaptive reuse for a five-story 100-year old building (former warehouse/office building being renovated into a boutique hotel) that has been vacant about 15 years. When the current owner purchased the building a few years ago, there were no interior walls in the building. The team has designed the renovation so that most of the existing nonstructural elements will be reused; the interior finish of the exterior walls (brick and plaster) will remain as is, the exposed concrete ceilings will remain as is, and most of the flooring for the new hotel (sealed existing concrete, existing terrazzo) will be reused. Does anyone know if we can exclude the area for interior walls that may have previously existed in our calculations since the building did not have any when it was purchased by the current owner? Also, does sealing existing unsealed concrete allow us to count the area of the sealed concrete flooring towards the 'Reused Area' for this credit's calculations?