A redevelopment project began in 2002 to re-clad the existing building, add a new storey to the tower block and build a six storey extension to the side of the tower.[3] The original distinctive concrete facade had been severely eroded, and it was decided to replace rather than repair this, as part of an expansion scheme. A louvered glass cladding replaced the original concrete, and the six-storey extension at ground level was completed in June 2006, as well as a new concourse and council chamber. The redevelopment cost ?50 million[4]. The building was previously measured at 64m, however the addition of the extra storey to the tower extended its height to 67m.[citation needed ] This new top storey is a glazed pavilion. The new storey also contains the restaurant Vertigo, offering panoramic views of the city and environs.
