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The idea for the project arose from Winnenden's long tradition of using the “Zipfelbachtal” area for recreation, dating back over a century. To preserve the Wunnebad's regional importance and adapt it for future needs, the city launched an architectural competition in 2018. The winning concept drew on the area's natural beauty, blending existing structures with modern, organic design. Extensive renovations and new elements—such as a training pool, sauna upgrades, and improved visitor flow—were realized while maintaining ongoing operations.
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The project establishes a strong dialogue with its surrounding landscape and urban edge. Nestled at the transition between the town of Winnenden and the natural setting of the Swabian Forest, the Wunnebad harmonizes architecture and environment. The design draws inspiration from the topography of the Zipfelbachtal and integrates the new structures organically into the terrain. Curved roofs and flowing forms echo the natural surroundings, while the layout connects the indoor and outdoor spaces seamlessly. The redesigned forecourt and entrance area guide visitors intuitively, creating a welcoming link between urban infrastructure and the green recreational zone.
The majority of the materials used in the project can later be either reused or recycled. The materials are documented in a table with data sheets, so it is possible to trace the properties and qualities of the components. Efforts were made to retain as many components from the existing building as possible, or to carefully store and reuse them. Among the newly used materials, the steel supports, aluminum façades, OSB boards, and drywall contain recycled content. An energy-efficient, water-based low-tech façade heating system for the swimming hall was developed, which is connected to the regular space heating. Additionally, the preconditioning of the saunas is managed via the space heating, allowing the sauna stoves to reach the desired temperature with lower power consumption.
The Wunnebad Winnenden is a comprehensive renovation and expansion of an established recreational facility, set in a picturesque landscape on the edge of the Swabian Forest. Its strength lies in the successful integration of new and existing structures, creating a modern, sustainable complex that meets year-round demands. The design draws from the surrounding topography and uses organic forms and curved roofs to blend harmoniously with nature.
Defining characteristics include the preservation of the iconic domed hall, the addition of a training pool with an adjustable floor, and the modernization of the sauna area with indoor and outdoor facilities. The redesigned foyer improves orientation and visitor flow, while a new lifeguard tower and outdoor changing rooms enhance functionality.
The architecture emphasizes openness and natural light, creating clear visual connections between indoor and outdoor spaces. Overall, the Wunnebad offers an inviting, future-oriented space that serves both the local community and the wider region.
“I'm thrilled to see now that everything is really being finished and we've created something here for schools and the public.” Pool Manager
Behnisch Architekten was founded in 1989 and works out of four offices – Stuttgart, Munich, Boston and Weimar. The firm enjoys a global reputation for high-quality architecture that integrates environmental responsibility, creativity, and public purpose and produces a rich variety of buildings mainly in Europe and North America. The partners and staff share a vision to push the boundaries of high performance, 21st-century architecture that respects user needs, ecological resources, and local cultures. From the beginning, Behnisch has prioritized the social dimension of architecture and the quality of the urban environment. Its projects respond to the material and spiritual needs of people. In over 30 years, the firm has created a diverse portfolio of projects that is attuned to the culture and climate of place and demonstrates new ways for occupants to inhabit their surroundings.
