Material Reuse on Other Buildings within Site Boundary

We are working on project that has four buildings connected together on the site. One of the buildings is being demolished, and a new building built in its place, and many of the materials are being salvaged from the demolition and reused. Most of the materials are being reused to renovate some of the existing buildings (which are not included in the LEED project scope), while some materials will be reused in the same function in the new building replacing the existing building. Can these materials count toward this credit and it so how would these materials be documented for this credit?