Skanska USA Commercial Development Inc. said that it has acquired Parcel L1 of Seaport Square in Boston’s Seaport District, with plans to develop a 455,000-square-foot office building on the site.

The seller of Parcel L1, which is located at the corner of Seaport Boulevard and Boston Wharf Road, was Boston Seaport LLC., a partnership between Morgan Stanley and Boston Global Investors.