Radnor’s Brandywine Realty Trust has partnered with Drexel University on a project, entitled Schuylkill Yards, that will be developed in six phases over a 20-year period, writes Natalie Kostelni of the Philadelphia Business Journal.

The first phase will begin during the first half of 2018, according to documents filed with the Securities and Exchange Commission.

According to Kostelni, office space will account for at least 60 percent of the initial phase’s 700,000-square-foot mixed-use facility. The construction should be completed by the end of 2019.

Brandywine agreed to build on approximately 10 acres next to the Drexel’s campus, and anticipates entering into a 99-year ground lease with the university on the first and subsequent phases of the project.

“It will involve a mix of commercial, office, educational, research, residential, and other facilities, as well as green spaces,” writes Kostelni.

The project will be a total of five million square feet and cost an estimated $3.5 billion.

Brandywine Realty Trust (NYSE: BDN) is one of the largest, publicly traded, full service, integrated real estate companies in the United States with a core focus in the Philadelphia, Washington, D.C., and Austin markets. Organized as a real estate investment trust (REIT), Brandywine owns, develops, leases and manages an urban, town center and transit oriented portfolio comprising 232 properties and 28.9 million square feet as of December 31, 2015.

Click here to read more about the Schuylkill Yards from the Philadelphia Business Journal.