Our project is in a dense urban area and we will meet the guidelines for SS Credit 2. Our local zoning ordinance allows us to build to the lot line, but we do require to have a 12' setback to to an adjacent residential district. My first question is do we calculate 25% of what our setback requirements are or 20% of our project's site area? We will through a variance not conform to the setback and build to the lot line. My second question is regarding a green roof. If we get Credit 2 does the vegetative roof need to be occupiable or can it just be Extensive?

Thanks!