Lapa Habitational Building is a minimalist residence located in Lisbon, Portugal, designed by João Tiago Aguiar. The project is about the reconstruction of a building located in Lisbon’s historical city centre. The existing building in an advanced degradation condition and lacking architectural quality was demolished and completely rebuilt, reshaping its compartmentalization, without distorting the memory of the environment in order to preserve the urban heritage of the neighbourhood, but guided by a contemporary intervention that marks the time of its execution. Both façades were demolished and rebuilt, keeping however, through metrics and materials, the memory of the building. The building’s intended use is for housing and it is developed in 4 floors (one semi buried and the latter corresponding to the attic), totaling a gross floor area of about 350m2 of new construction.