Project tackles the issue of low density and underpopulation in Lelystad by an attempt to retroactively densify the city historical core. The architectural intervention consists of revitalization vertical addition of dwelling function on one of the Lelystad very first buildings - the shopping center Lelycentre. Building is assesed in aspects of cultural and architectural values and building technology and scenario for its adaptation is proposed. Project touches the issues of safety, quality of public space and livability of the neighbourhood and explores the possibilities offered by high density and proximity of mixed functions.