Most major Australian cities expect significant infill development over the coming decades. But without significant intervention, ‘business as usual’ development is expected to seriously undermine the hydrology, resource efficiency, liveability and amenity of our cities. IPR4 leads the way in tackling this problem, by developing industry focused tools to assess these impacts for infill developments, and the benefits of more water sensitive designs. The outcome will be design alternatives that combine quality/visionary architectural design with good water performance