Vulcan Real Estate is developing the four towers slated for a 2023 completion. : Amazon has leased 555 Tower and West Main, two upcoming developments totaling 2 million square feet of office space across four towers in downtown Bellevue, Wash., following the company’s expansion announcement from early February. The e-commerce giant intends to add 10,000 more jobs to Bellevue during the next several years. Vulcan Real Estate broke ground on both Amazon-leased projects earlier this year, with expected completion in 2023. The 42-story 555 Tower will rise on 2 acres at 555 108th Ave. NE.