Using the existing single-story house as a starting point, this project involved altering and expanding it to add a second floor and access to the accessible roof. Originally designed in the mid-20th century, the existing house's design reflects the "Português Suave," or nationalist, style characteristic of the decades during which Portugal lived under the Estado Novo regime.

Aesthetically, the choice for the second floor was to continue the existing architectural language, reimagining its rhythm and the size of the openings.

For the construction system solution, the choice was made for a metal system that would lighten the expansion while ensuring comfort levels in terms of acoustic insulation and thermal performance.