My client is designing a hotel project which will be built in two phases. First phase will consist of the undergroud part, one floor above the ground (bowling, disco etc.) and one tower above this (hotel). The second phase will be an addition and will consist of a second tower placed over the already existing first floor (close to the other tower). The Client wants to have two separate certificates for each phase. How should we do it?

1. Can we register first phase and then separately register the other phase as an addition? If yes, how do I register an addition, how can I mark in LEEDonline that this project is an addition to a previous project? Another question is: since this is going to be a vertical addition what will be the LEED project boundary? Can the addition use the same project boundary as the other building and get points related to its site?

2. Or should I register it as a block (I found this option in LEEDonline even though I don't really know how it works)? Where can I find more information about certifying a block?

3. Or should I register it as a campus project?

I would really appreciate some suggestions.