One Park West is a 17-storey building in central Liverpool, England, designed by architect César Pelli. Bordering Chavasse Park, it is part of Liverpool One, a 42-acre £920m redevelopment of Liverpool's city centre. The developer was the Duke of Westminster's Grosvenor Group. One Park West consists of 326 apartments, offices, restaurants, cafés an…One Park West is a 17-storey building in central Liverpool, England, designed by architect César Pelli. Bordering Chavasse Park, it is part of Liverpool One, a 42-acre £920m redevelopment of Liverpool's city centre. The developer was the Duke of Westminster's Grosvenor Group. One Park West consists of 326 apartments, offices, restaurants, cafés and parking. Blocks B and A of One Park West are the 21st and 31st tallest buildings in Liverpool respectively.