SEATTLE – Amazon will occupy the 2nd tallest tower in Seattle, according to the developer of the project.

Wright Runstad announced Tuesday morning that the e-commerce giant will lease all the office space of the Rainier Square development in Downtown Seattle.

Construction of the 58 – story tower has now begun in earnest, with excavation planned until 2018. It is expected to be completed in 2020.

The 1.17 million – square foot project includes office, retail space, and luxury apartments. Wright Runstad says Amazon has agreed to a lease of all the office space in the tower.

Last month the company said it will spend more than $5 billion to build another headquarters in North America to house as many as 50,000 employees outside its hometown of Seattle.