Our client is building a Retail center for a large grocer with small satellite retail spaces. The balance of the building is simply a parking garage with an enclosed and tempered elevator lobby. The owner is considering installing the Shower and Changing Rooms for the tenants but no other plumbing will be provided elsewhere. If we don't build out the Shower Room, how else can we meet the 20% reduction to qualify as a LEED project? There is also no intention to require the tenants to reduce water usage as part of their lease.