Floors 13 and 14 will be added to the National Association of Realtors building on Michigan Avenue.
The project represents a second height increase for the building originally erected in 1962. The building went from its original 10 stories to 12 in 1991.
According to Curbed Chicago, the latest expansion, designed by Chicago area architecture firm Healy, Bender & Associates, will include a circular, glass-walled conference room overlooking the Mag Mile. The addition will grow the structure’s overall footprint by about 18,000 square feet.
The two new floors are expected to be completed by late next year.