Suburbs are often very contradictory places. Despite great part of urban population live there, these parts of cities are mostly considered as degradation places. The topic of suburbs regeneration is relevant today. Nevertheless, often expensive interventions implemented by local authorities fail to regenerate their public spaces. This paper presents the experience of “Serpentone reload”, a workshop based on participatory reactivation of abandoned or underused spaces and buildings in “Cocuzzo/Serpentone” neighbourhood in Potenza (Basilicata, Italy). The workshop particularly focused on the reuse of the “Ship”, an underground building, completed in 2010, never used, because it has been perceived as an extraneous element, the result of an imposition and not the outcome of shared choices. The experience is particularly significant, because it shows how low cost interventions, realized with citizens involvement, could contribute to the regeneration of peripheral urban areas more than expensive and complex imposed interventions.