renovation and addition: effect on site boundary

Dear all, We're working on a project that renovates a tiny portion (interior fit out only) of an existing building and involves an addition right next to the renovated portion. There is no site work involved adjacent to the renovation. For this reason we would like to exclude the site area adjacent to the renovation from the LEED site boundary. Is there a precedent to or guidance on this issue? Can the LEED site boundary exclude the renovated building portion altogether and the site around it? Thank you. Ramana.