The building has been scaled down from its initial one mile high (5,280 ft) proposal, which was never fully designed, to a height of at least 1,000 metres (3,281 ft) (the exact height is being kept private while in development, similar to the Burj Khalifa). [A] At about one kilometre, Jeddah Tower would still be by far the tallest building or structure in the world to date, standing 180 m (591 ft) taller than the Burj Khalifa in Dubai, United Arab Emirates. Jeddah Tower's 50-hectare (120-acre) plot with surrounding buildings will be the first of a three phase Jeddah Economic City development. The three phase project proposed for a large area of undeveloped waterfront land with an area of 5. 2 km2 (2. 0 sq mi). It was originally planned to cover 23 km2 (8. 9 sq mi) and cost SR100 billion. The area is located roughly 20 km (12 mi) north of the port city of Jeddah. Jeddah Economic City was designed by HOK Architects, and is estimated to cost at least SR75 billion (US$20 billion) and take around ten years to build.