Hello,
We are working on a project in NY, which is a major renovation. The project will demolish all the envelope but will keep most of the structure (roof structure, columns, and beams); however, there will be changes in slabs and the addition of columns to reinforce the structure. We are still deciding if register the project as NC or Warehouse. We will conduct an LCA; therefore, the project will follow option 4 in the building life-cycle impact reduction credit.
My questions are: 
Can I claim savings due to reusing the building structure
And if so, is it correct to use the procedure for calculating the savings according to the “small-scale reuse” process in the LEED guideline? 
Thank you