Just when you thought development in Dubai was frozen along comes the news that construction contracts were just awarded to Arabian Construction Company for Pentominium, the tallest residential in the world at 618 metres (2027 feet) and 124 floors. At a cost of AED 1.46 billion ($USD 400 million). The total floor area will be 170,000 square meters and expected to take just 48 months to build. Currently Q1 in Australia is the tallest residential tower in the world. Aedas are the project designers.