Perth, the capital city of Western Australia, is a city which is urbanizing into seasonally waterlogged land on two major development fronts. One result of this is that many new greenfield developments are adopting Living Stream orientated Public Open Space systems to cope with the related drainage issues. With respect to this situation this paper scopes the twin research questions, to what degree can Perth Living Stream reserves be considered high amenity Public Open Space, and how can Living Streams be optimized, from an urban design perspective, to provide greater amenity?’ These questions are explored in relation to a taxonomy of recently constructed greenfield Living Stream projects in Perth. The paper concludes that a number of urban design strategies could be deployed in relation to urban density and structure, which could increase the amenity Living Streams provide.