The crisis caused a slowdown in the usual way to “produce” the physical space of the cities, creating an area with voids waiting to develop (in the broadest sense of the word, not just referring to urban development). Given these circumstances, it became necessary to put into motion urban strategies and tactics so to activate the territorial resources available to the cities.

From this perspective, the Diputació de Barcelona proposed a framework of stable collaboration with the municipal entities in order to support them with strategies, tools, and proposals for the management of spaces that had remained empty in the municipalities of the province. Given the existence of these spaces in Santa Margarida de Montbui pending to build, urbanize or reconvert with new uses, and the reluctance on how to address this problem, the municipality asked the Diputación for its collaboration. And it is in this framework, the project was carried out by the team *estel.