The ownership of Casa Batlló continues to delve into the building's history and find new uses to keep it alive. They are now opening to the public the last floor inhabited by the descendants of the Batlló family for over a hundred years, after carrying out an archaeological restoration of all elements. The apartment had been preserved with an “exceptional authenticity”, as stated in the press release issued by the ownership, and constitutes “a valuable testimony to Barcelona domestic life in the early 20th century”. The chief architect of Casa Batlló and head of the recovery works, Xavier Villanueva, points out that the one on the third floor is the original dwelling remaining in Casa Batlló because around 1950 all others were modified except this one, as it was rented to the Batlló family. The third and fourth generation of the Batllós lived in the apartment for over 100 years, until 2019.

Antoni Gaudí took care of every detail of his buildings, and was innovative even in the less showy parts. After months of work, those responsible for Casa Batlló have restored the unusual black color of the rear façade, which in the 1930s was covered by a cream-colored paint that had become etched in the collective memory. "We have recovered an image of the façade, which, if not from 1906, is the closest," says Xavier Villanueva, the architect who has led the restoration of Casa Batlló for more than twenty years. "This is the first time that the façade has been fully restored, as stipulated in the master plan we drew up about ten years ago. We have done it with scientific criteria and thanks to an extensive, truly extensive, documentary database," says the architect. The snail shell and the white lead color of the balcony railings have also been restored.