U.S.-based real estate investment firm American Realty Advisors and Norwegian rival Norges Bank Real Estate Management joint venture (JV) has acquired 121 Seaport office tower from Swedish construction company Skanska.

The joint venture paid approximately $455 million for the Leadership in Energy and Environmental Design platinum office tower building to Skanska.

The office tower building, located across from District Hall and Seaport Square Green, was developed for approximately $281 million.

U.S.-based real estate developer Newmark Knight Frank represented Skanska in the deal.