This project involved the rehabilitation of a house located in the center of Porto, with basement, two floors, attic and a small patio. The lower floors are open space interconnected social areas, thus enhancing the interaction between the spaces and spreading natural light. On the top floor, were implanted 2 bedrooms. All floors are connected by a new staircase that connects the spaces from the front door to the attic. From the pre-existence it has kept the memory of a lantern that illumined the first floor. In this new skylight window arise 3 new windows that take advantage of natural light and forward it to other spaces in the attic. In terms of artificial lighting, it was decided to create an uplight and minimal system integrated in the elements of the house (walls, cabinets, ceilings) and thus, in a house with small dimensions, be achieved a hidden general lighting that makes highlight space without adding to it.