The Laboratory for Visionary Architecture (LAVA) has completed work on a sustainable and inclusive sports-focused youth hostel in Bayreuth, Germany, conceived as a new model of “international, innovative and integrative” design.

The distinctively Y-shaped JH Bayreuth is located on a 3,800sq m (40,000sq ft) landscaped site between Bayreuth’s city centre and university. Its expansive grounds feature sports fields, adventure playgrounds, volleyball terraces are gardens.

Interior and exterior spaces interweave across two floors, offering expansive views and multiple accessible openings to the sports fields and garden. Each 30m-long wing of the Y has access to the exterior at its end, while many looping pathways converge at the central point of the complex.

The upper floor of each wing is connected via an outdoor area with stairs to the landscape level, one of which doubles as an amphitheatre for cultural events like outdoor movie screenings and theatre performances. Parts of the building become stands for the sporting events taking place around the building.

Meanwhile, the reception, seminar rooms, bistro, kitchen and sports and game facilities are spread out over two floors and connected to each other via a central atrium, which serves as a hub for entertainment and interaction.

Designed in collaboration with Frankfurt studio Wenzel + Wenzel, the hostel’s rooms, grounds and facilities are all fully accessible and equipped for active people of all abilities. There are 45 guest rooms in total, including 14 on the ground floor that are wheelchair accessible by lift or ramps, with walk-in showers and wheelchair-accessible sinks.

“We have considered environmental sustainability – using local materials, highly insulated

facades, renewable energy and pollution reduction – but also social and structural sustainability,” the design team said in a statement. “Universal design allows everyone to work and to stay and integration sees more potential users, resulting in the optimum use of the facility.”

LAVA has created an intelligent wooden wall system for modular built-in furniture, including toilets, showers and niches for rotatable beds. This means that rooms can be configured in different ways – for individuals, families and wheelchair sports teams – with space for up to six beds. In total, 180 people can sleep in the JH Bayreuth at any one time.

Tobias Wallisser, LAVA director, said: “Our research showed that Gen Y travellers want funky design, a special identity, access to community and unique experiences, not just a clean bed and shower. So our reinterpretation of a youth hostel features innovative spatial configurations that encourage interaction and accessibility; sustainability at functional, constructional and social levels; and integrated sporting facilities.

“This is a major built project by LAVA, a fully inclusive place, and we are pleased to see our designs, based on sustainable principles, coming to fruition.”

The design flexibility extends to the facility’s other interior spaces. The building’s only load-bearing components are along the corridors and the facades, meaning the rooms are freely dividable inside and could, in the future, be converted. As a result, the hostel may one day be transformed into anything from a kindergarten to a school or retirement home.

Much of the structure, including wooden trusses, is exposed to create a raw and solid space. According to LAVA, “the use of wood, concrete floors and ceilings create an industrial robustness with brightly coloured infills and strong graphics referencing sports activities or natural elements like tree canopies.”

LAVA – which previously remodelled the 1930s Untersberg house in Berchtesgaden, Germany’s first designer hostel – won the international competition to design the €10m (US$12.4m, £8.8m) hostel five years ago, during which time they collaborated with the Bavarian Youth Hostel Association to redefine their architectural guidelines to meet contemporary expectations

The practice was founded in 2007 by directors Wallisser, Chris Bosse and Alexander Rieck to “merge future technologies with the patterns of organisation found in nature to build a smarter, friendlier, more socially and environmentally responsible future.”