Barcelona is one of the most densely populated cities in Europe. In 2015, 35% of its surface area was occupied by residential areas and facilities. Green urban areas represented 29% of the municipal area, whilst the road network represented 22%. Industry and infrastructure occupied 14% of the city.
90% of properties in the city are in good condition, according to the 2011 census, 7% poor, 1% bad and 0.2% in ruins.
The housing stock is old. 63% of properties are pre-1970 constructions, whilst only 4% of buildings were built in the 21st century. In this regard, renovation policies are essential.
Barcelona has 821,125 residential properties (2015 data). Of these, only 3.8% are empty (unused), compared to 92.1% that have residential use, 3.3% that are destined for other uses, such as professional activities, and 0.8% that are under construction/renovation or in ruins. Of the 31,202 unused homes (3.8%), 10,637 are for sale or rent, 4,679 are unusable and we do not have information about the rest.
New works have fallen in the last decade. The number of housing developments under way has fallen sharply, although there has been a certain degree of recovery in recent years.