The two penthouse levels, which are somewhat smaller in surface than the other floors, thus creating a balcony, have a terrace each on the west side, with the lower level protected against the prevailing winds at the northwest side by a glass screen, and above that is an accessible uncovered roof top, the so-called "daktuin" (roof garden), a name that was used for the penthouse as a whole. This rooftop platform extends over the second level terrace, thus covering it. The lower terrace is now a restaurant, which it also was in summer when the Schunck family lived there. The second penthouse level and roof top are not accessible to the public. Nor is the second (lower) basement. Because the basement slab had to be placed at the considerable depth of 6.5 m, in places there are three basement levels. The basements were used for machinery, storage and workshops. The centre of the first basement was a sales area, the part that is now accessible to the public.