Builders are building a massive, $1 billion tower to be erected on the Empire state building in New York City.
The building, which will be known as the Empire Center, will replace the Empire Hall in Washington DC, which is slated to be demolished in 2019.
The project is being built by New York-based architectural firm Vickers & Jacobs, and will be a $1.4 billion (AUD$1.1 billion) project.
“It’s an iconic building that has stood the test of time and has a rich history,” said Vickers’ David Vickers, who is leading the project.
“The Empire State building is the pinnacle of American design and we wanted to create a unique and iconic building to complement the city’s other iconic landmarks.”
The project will include the demolition of the building’s historic facade and the creation of a new structure, which Vickers said would be “built for New Yorkers”.
The building will be the largest in the world, measuring 1,200 metres (3,742 feet) tall and weighing a record 1.9 million tonnes.
It is also one of the world’s most expensive buildings, with the construction cost estimated to be about $200 million.
The Empire Center is expected to take about 20 years to complete, with completion set for 2023.
The project comes after the US State Department awarded $1,300,000 in the US Department of Housing and Urban Development’s Housing Choice Voucher program to help developers create new housing units in New Jersey.