»house-birmingham« was constructed between the 10th and the 21st of May 2004 in the middle of Centenary Square in Birmingham. Over a period of twelve-days a group of builders aided by student apprentices from the CITB / National Construction College and South Birmingham College simultaneously constructed and deconstructed a series of house shells reminiscent of two interlocking terraces. Five metres high, they were juxtaposed via a rotational symmetry and built from lightweight cellular concrete blocks, involving a new fast-bonding dry-assembly construction technique. By completion of the project, two separate terrace structures had been built in the same place at the same time. By Wolfgang Weileder.