The great horizontal volume of the hospital extension contrasts with the less dense, more dispersed buildings of the psychiatric area. In its dimensions and its geometry, it connects with the small scale of buildings of the garden city, and this define the smooth boundary of the park.
The center of the new hospital is a great square which signals the end of a sequence of urban spaces along Höhensteig, the southern access route serving the garden city. The different parts of the hospital are grouped around this central square, which distributes and links them all together in the manner of the historic square in one of the old towns in the vicinity of Berlin.
The terraced garden, which continues to the east from the existing villa, might be said to maintain or even to recover the original baroque structure. There will be no building in this part of the site, thus effecting a return to the pleasing historic relationship between garden and villa.
The psychiatric units are formed by two-story courtyard house that have been displaced to form the soft boundary of the new hospital where it meets the park. The six psychiatric units are accommodated in six free-standing buildings, of which four open directly onto the landscape, while the two intensive observation units are oriented towards the interior. In particular, the garden is an important part of the process of getting well. In terms of their dimension and distribution, these buildings are based on models of community or ‘sheltered’ housing. The layout of the units makes for an interesting graduation from the narrow street to the courtyard to the open landscape.