Chicago's Optima Center has reached the halfway point of the 42-story mixed-use structure. Construction began one year ago on the 325-unit Streeterville tower, designed and built by architect/developer David Hovey and DeBartolo Development.

Installation of the black glass on the parking podium is complete, and installation has begun on the blue glass façade, Curbed Chicago reports.

The $114 million, 443-foot (135-meter) tower will include 22,000 square feet of commercial, retail and office space.

Delivery of the first units is expected sometime next year, according to the company.