This boarding house located in the heard of booming suburb Mascot stands five storeys high and incorporates basement parking. While the area is moderately flood affected, the stormwater system had to incorporate fail-safe design to prevent floodwater entering the basement and causing long-term issues. The On Site Detention tank was located seamlessly below the driveway, preventing any impact to the architecturally designed building, with stormwater water quality filters designed to Bayside Council’s requirements.