The basement was intended to be the garage, the main floor the residence of the Milàs a flat of all 1,323 m 2 , and the rest distributed over 20 apartments.
This would become one of the major influences in his architecture to come.
Since 2013 it has been the headquarters of the Fundació Catalunya La Pedrera which manages the visit to the building, exhibitions and other cultural and educative activities at Casa Milà.