Mansion House building put up for sale ONE of St Helens most iconic and historic buildings is being put up for sale. Mansion House, in Victoria Park, which has been the headquarters of Age UK Mid Mersey for more than 25 years, is to be put on the market. The independent charity that helps local older people, says it is putting its historic St Helens headquarters up for sale in order to provide a better service for those they support. Age UK Mid Mersey say they have reluctantly decided to sell The Mansion House, which sits in the surroundings of Victoria Park in St Helens.