City Tower, (formerly the Sunley Building) is a 30-storey skyscraper situated in the Piccadilly Gardens area of Manchester, England. It has the highest office space currently available in Manchester, standing 107 metres (351 ft) tall. City Tower was completed in 1965, the Plaza complex was constructed by the developers Bernard Sunley and designed by Covell, Matthews & Partners. It is currently the fourth tallest building in Manchester. The Tower has retail and leisure units on the ground floor and is Manchester's main radio transmitting station, which is located on the roof.