The society of the 21st century is experiencing moments of constant technological and social changes that are totally modifying the services and benefits of the habitat where human beings carry out their activities. Likewise, on 25 September 2015, the United Nations approved Agenda 2030, defining the Sustainable Development Objectives for the next decade. From now on, our cities and towns must be sustainable, resilient, efficient, energy-efficient and non-polluting.Urban and architectural rehabilitation plays a key role in adapting the existing building stock to the new requirements of this more sustainable future. But an adequate response to these challenges can only be given if we deepen, as a previous action to any sustainable intervention, in the methods of analysis and evaluation of the current state of our neighbourhoods and buildings.For this reason, diagnosis is essential as a discipline, helping to understand the technological, constructive, social and economic complexity of our built realities, and offering really efficient lines of intervention in rehabilitation projects. Therefore, so that the work of the technicians can reach the rigor that the new times demand, it is absolutely necessary to increase training and specialization in this field, incorporating all those new areas of knowledge of today’s society.We therefore celebrate the results of the European Erasmus Plus Project “Diagnosis Innovating: a crucial profession in Building and construction sector”. It is a strategic action that has made it possible to advance in the redefinition of this discipline and reinforces the networking of the different international experts specialised in the field.
