Between 2001 and 2011 there was a decrease of 36.0% in the number of very degraded buildings and 40.4% in the number of buildings with large repair needed (corresponding to a decrease of 1.3 p.p. and 2.4 p.p. in the respective weight), showing a reduction of the buildings in a bad state of conservation, also due to the increase of 12.2% in number of classical buildings.
Buildings with 3 or more dwellings were in better state in 2011, and among buildings with 1 or 2 dwellings, the isolates showed a better condition. The exclusively residential buildings were in better maintenance status when compared with other types of occupation.
NUTS III regions of Grande Lisboa, Algarve and Tâmega recorded the highest number of licensed rehabilitation works between 2001 and 2011.