The existing residential unit on the upper floor is separated from the rest of the building and given a new access. On the ground and upper floors, all relevant internal partitions as well as window openings and doorways of the historic fabric are retained. As the roof structure is of no historical significance, dates from the most recent construction phase and no longer meets structural standards, it is demolished and rebuilt with insulation. In addition to a recessed terrace in the secluded western part of the roof, the gable windows to the north and south are enlarged and roof windows are provided to the east as shown on the plans.