Connected by two bridges, the new Public Swimming Pool Großfeldsiedlung expands a municipal swimming complex from the early 1980s with a contemporary, climate-responsive addition. The extension occupies parts of the former parking area, limiting additional land consumption while preserving the existing trees. Between the old and new building, a green lane is created, which intuitively guides visitors to the new, light-flooded foyer. A winding staircase leads to the elevated pool level, where two bridges create a continuous circulation space linking old and new. The 6m high training pool hall is structured by a timber frame with long span glulam beams and a cross laminated timber roof slab. Full-height glazing opens the hall to the surrounding greenery, while natural timber surfaces and tiles in white and light grey tones create an athletic atmosphere. As part of the refurbishment, the existing hall received a new, raised roof. By relocating the load-bearing structure, the multipurpose pool now benefits from increased ceiling height and soft, glare-free daylight entering through translucent side openings. With its generous timber roof overhang and continuous clerestory windows, the new building alludes to the facade rhythm and distinctive roofline of the existing building. A three-dimensional vegetated steel structure envelops the glazed facade, providing passive shading, enhancing urban biodiversity and forming a living green veil that shifts appearance with the seasons.