The Mass Transit Railway Corp (MTRC) has secured Government approval for plans to build the territory's tallest building at the airport railway's Central terminus. The 90-storey, 400-metre commercial tower will stand on a six-level basement and comprise a gross floor area of 2.02 million square feet. The project is part of the station's property development jointly built by a consortium led by Sun Hung Kai Properties (SHKP) and Henderson Land Development. The developers had previously said the tower would be 88 storeys. An SHKP spokesman yesterday said the difference could be attributed to the inclusion of floors for fire prevention and mechanical and electrical facilities. She said there had been no change in the building's absolute height. The MTRC project was one of 42 building plans approved by the Buildings Department in February, which included 23 residential-related projects and 10 commercial developments. Hutchison Whampoa received approval to build a 62-storey office tower over six basement levels at the former Hilton Hotel site in Central. It will provide 1.55 million sq ft. Henderson Land also received the go-ahead to develop 21 13-storey residential blocks at Tai Tong Road, Yuen Long. The project has a floor area of 1.14 million sq ft. Billion Great Investment will build 311 houses at Kwu Tung, providing about 618,000 sq ft.