The renovation and expansion of Haus Rosenau Clinic aims to integrate and enhance local medical resources to create a healing space that is efficient, economical, and able to cooperate with nature. This project includes renovation of the original building (including the 2004 expansion), re-organizing the spatial structure, layout, and circulation, as well as the construction of a new six-story building with 76 new rooms. In addition, the design establishes a closer urban connection by a new main entrance and bridge, and a more intimate appearance within its surroundings through the renewal of façade.

Haus Rosenau, located in the resort city of Bad Sassendorf which is known for its salt bath, is adjacent to the city's hot spring park to the north, and closely related with a therapy center (Kurmittelhaus) on the southeast over a street.

In order to further enhance the medical service capacity of the region, this project renovates and modernizes the 1-4th floors of the original building (including the 2004 expansion), while builds a 6-story new building along the two northeast axes to meet various needs such as hospitalization, cafeteria, medical treatment, and office.

The new building presents an "angle" shape, with one end vertically connected to the original building and the other end extended towards the hot spring park, which provides an attractive facade facing the park. However, façade renovation for both original building and new building integrates the whole building into a friendly and welcoming architectural image.

In addition, a new main entrance and a spacious front yard have been set up at the intersection of the original and the new building, creating more convenient transportation conditions; while, a new connecting bridge has been built on the southwest to connect the therapy center over a street, forming a complex of "diagnosis + treatment + health care", enhancing the urban connectivity of the entire neighborhood.

Whether renovating or expanding, the design aims to create an advanced, economical, and efficient medical space. The well-organized and efficient spatial layout is based on various requirements for both public and private uses, as well as the needs of different groups such as staff, patients, and visitors.

The 1st floor of the building is defined as the main communication space, carrying functional spaces with strong publicity, such as the central registration hall, counseling room, examination room, as well as dining and lounge areas. The dining area designed for 260 people is shared with patients from the therapy center, which can be accessed via the bridge.

The 2-5th floors of the building are defined as patient rooms, with consideration for patient comfort and well-being in the layout and facility settings.

The rooms in the original building were renovated by removing balconies that increase the amount of usable space for patients, as well as applying celling-to-floor windows that enhances natural lighting and views of landscape. The rooms in the new building are according to the architectural form, adopting an east-west oriented layout to create an optimal layout that is well-suited to the surrounding environment.

Meanwhile, the 5th floor of the original building and the 4th floor of the new building have been redefined as flexible and multifunctional spaces, maximizing its utilization.

As for spatial efficiency and practicality, the design aims to fully improve the patient experience. Through visual and spatial settings, patients can feel nature as much as possible, incorporating nature into the healing process.

The dining area and counseling room on the 1st floor take advantage of a large area of glass to create a pleasant atmosphere, where certain windows can be opened outwards to connect the outdoor area, forming an outdoor dining area and outdoor discussion area, leading people to the north courtyard and the south waterfront space.

The waiting area at the intersection of the original and the new buildings, also as a vertical hub, features a full-height glass facade to provide sufficient lighting, and the combination of natural lighting and materials creates a warm and inviting interior throughout the building.

In addition, both the original and the new building have utilized their top-level space. The 5th floor of the new building features a bright corridor with natural lighting along its axis, providing people with the opportunity to look up and enjoy the skylight; The top floor of the original building has been converted into patient rooms with balconies, allowing people to overlook the city center.

In terms of sustainable design, the large-scale use of glass takes into account functional requirements such as sun protection and anti-glare.

The facade renovation not only gives a unified appearance, but also optimizes thermal insulation for facades facing different directions based on local sunlight conditions. At the same time, different colored shading forms rhythmic patterns on the facade, further emphasizing the warm and cozy characteristics of the clinic.