The tower is 98 metres (322 ft) tall[4] (120 metres (394 ft) including the communications mast)[5] and is a Grade II* listed building.[6] The design is based on Goldfinger's earlier and slightly smaller Balfron Tower in Poplar, East London.[7] It has a long, thin profile, with a separate lift and service tower linked at every third storey to the access corridors in the main building, which overall has 31 floors. Flats above and below the corridor levels have internal stairs, while the 23rd and 24th floors are taken up by maisonettes split over the two floors. Overall, the building contains 217 dwellings and was originally owned by the GLC with the flats rented as council flats.