The present project explores in 6 sustainable neighbourhoods in Europe (Germany, Spain, France and Sweden) the sound qualities of intermediate spaces located on the facades of building like balconies, loggias, terraces and corridors. A cross analysis of the physical dimensions of the built space, of the sound environment and of the user's perceptions allows to describe the minimum conditions of existence of these remarkable sound situations (soundscapes). All of this work is compiled in a catalog that is the first tool for sound design of such type of spaces. This catalog is available online on the portal Esquis'Sons (esquissons.com) and geolocalized. This papers shows also how from this remarkable soundscapes, a parametric tool in order to sketch the soundscape of future project has been built. The application use 3D spatial model used by designers and provide a real time 3D virtual sound environment in which users can hear the impact of architectural choices made during the design process. The auralization module is informed by the geometric characteristics of the spatial pattern and vice versa. In other words, this application lets you sketch a space by listening.