CHICAGO — Tandem Partners has opened Sage West Loop, an 18-story mixed-use development in Chicago’s West Loop neighborhood. The high-rise building comprises 196 studio, one- and two-bedroom units, as well as 1,806 square feet of retail space and 70 parking spaces. Amenities include co-working spaces, a fitness center, game room and outdoor sky terrace with grilling stations and firepits. Tandem Construction was the general contractor on the project. KTGY served as the design architect, and Antunovich Associates was the architect of record.