This is the first session of a morning in the radical changes that housing suffers . The concepts of comfort change when we intensive use of residential space and the concepts of minimum space, minimum height, ventilation, privacy, sound insulation change in a dizzying way. These are pending issues for decades, but the emergence of the post-pandemic situation has highlighted the urgency of the debate and the application of new conditions in the homes that we will have to adapt if they already exist and in which we will have to design and build again.