Keywords Change this

International Bauausstellung 1987, IBA 87, Ecological, Social Housing, IBA 1987

Project timeline

1987 – 1990



Location Change this

Rauchstraße 21

Also known as Change this

Öko-Haus, Tree House, Ökohäuser

Architect Change this


Article last edited by Bostjan on
March 01st, 2020

Eco-Houses Change this

Berlin, Germany
by Frei Otto Change this
1 of 19

Description Change this

For the 1987 International Building Exhibition IBA in Berlin - IBA Berlin 1987, Josef Paul Kleihues and Frei Otto were commissioned to design a block of flats on the principles of natural building.

The site is situated in a fallow land surface in the vicinity of the Berlin Wall. Frei Otto suggested "a three-dimensional garden city" with low density and private use of public green. He developed two skeletal structures made of concrete with a width of about 35 m and about 60 m in height.

Frei Otto is against forms of dwelling that disregard respect for the individual, and he incorporated this belief into his design. The future residents planned their own building which included 50 one- and two-storey houses. Throughout the process advice and consultations were had with eco-architects, garden designers and energy experts - making sure that all the guidelines for social housing were still met. The final design includes solar panels and generous glazing, to harness solar energy, while the remaining buildings have green surfaces.


Posted by AleeshaCallahan | Tuesday, August 6th, 2013 | 17:24pm
Trailer for the film on this building: Dreaming of a Treehouse

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