Manchester One (Manchester)

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Manchester One, formerly known as Portland Tower and previously St. Andrew's House, is a high-rise building in Manchester, England, owned by Bruntwood and let out as office space. The tower is located at 53 Portland Street from which it was named. The tower was one of the first high-rise buildings built in the 1960s and 1970s in the United Kingdom.

In 2002, the west side of the tower was painted bright yellow and boasted the logo for the 2002 Commonwealth Games. It is now dwarfed by the CIS and Beetham Towers. It was one of Manchester's tallest buildings when completed, and has since been renovated as part of Manchester city centre's regeneration. At 80 m (260 ft), it is the joint eighth-tallest building in Manchester alongside the Manchester Civil Justice Centre.