InDeaTe Tool and Template is a sustainable design support, aimed at imbibing and improving the sustainability considerations in any design. This paper presents a case-study on ‘design of green roof’, a type of green infrastructure, to combat the existing issues of Stormwater Management in Syracuse. The primary objective of the design project is to design (or re-design) a green roof that will store stormwater for enough time during a reasonably strong storm so that the capacity of the Syracuse Metro treatment plant would not be exceeded. A second objective is to incorporate low environmental impact materials when designing the green roof so that the final design is more sustainable. The case study discussed in this paper, illustrates how the use of InDeaTe Tool not only improved sustainability considerations and led to many creative solutions, but could be used for design of more sustainable service systems.