House in planetary boundaries
As a modern counterpart to the massive, monumental existing buildings along Karl-Marx-Allee, the new building aims to feature forward-looking architecture that challenges previous standards in terms of construction, materiality, and technology. In the process, the architects consider the entire life cycle of the building and combine different approaches to achieve the simplest, most resource-efficient and circular construction possible. A low-tech approach is intended to create a climate-adapted architecture and minimize built-in technology. A building simulation helps facilitate a climate-adapted building configuration. For example, the large event hall is to be in the north of the building, while enclosed spaces are organised around the core.

In the spirit of circular construction, the aim is to use materials and components that are already in circulation. In addition to reuse and the use of recycled materials, particular emphasis is placed on local, renewable raw materials. Composite materials as well as wood-concrete composite ceilings are avoided. Instead, it is a pure timber construction based on the principle of design for disassembly. Both the facade and floor plans are modular. The grid system offers a great deal of flexibility and the option of converting and dismantling the building at a later date. The roof will be designed as a retention roof with intensified extensive greening to promote biodiversity and will be fitted with a PV system.

Background
In 2015, parts of Karl-Marx-Allee were designated as a development area in the federal-state funding program “Vibrant Centers and Neighbourhoods.” This urban development funding program has been focusing on the adaptation, revitalization, strengthening, and preservation of neighbourhoods and centers. The development of the special building by asp Architekten and LXSY Architekten is now also taking place within this scope. The property is owned by Wohnungsbaugesellschaft Berlin-Mitte (WBM) and Berliner Immobilienmanagement GmbH (BIM) and will be used by the Heinrich Böll Foundation.

The new Pavilion on Karl-Marx-Allee is a pilot project, showcasing how circular construction can be promoted through both judiscious design and a foundation with public funding in the background.

Both parts of the building have a two-storey design and repeatedly make reference to the existing GDR modernist buildings through design elements. For example, a large gallery that mediates between the levels in both buildings and emphasizes the effect of the open, communicative character. Its function as a centerpiece is expressed above all in the main building: In the form of a lively staircase, it should invite people to sit down, read or exchange ideas and can be used as a grandstand at events.