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gsw headquarters building, Berlin

The brief was for a £73 million extension to a 1950s headquarters tower block for gsw, a social housing group. Sauerbruch Hutton's extension provides 30,000m2 of offices, shops and public areas and wraps the existing building in three sculptural forms: a fin, an oval cylinder and a rectilinear block. The low-energy concept is founded on six basic characteristics of the building which have been generated through the form and orientation of the plan, in combination with the west ...

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