Details have been revealed for a new mixed-use development at 357 N Green Street in the West Loop. The final of the three-proposal being presented in this month’s Committee on Design meeting including the 600-foot-tall 420 N May Street, this tower will replace a vacant lot just north of the Metra tracks on the corner with W Kinzie Street. Proposed by Canadian-based Onni Group, this project is being designed by local architecture-firm SCB and will sit over the Kennedy Expressway below.
Rising 29 stories and 457 feet in height, it will become the tallest of the Green Street cluster surpassing the upcoming 360 N Green and the updated 440-foot proposal for 330 N Green. Faced with unique site restrictions, due to the highway crossing below its northeastern corner and not allowing for any foundation work to occur on top of it. To address this the proposed structure will sit at an angle, with its eastern facade hugging the hidden driveway and the southwestern corner open to the public as a green plaza.
We will start our look into its design from this space, the rising stepped-plaza will be the main entry point to the site from the heart of the Fulton Market area. It’ll utilize a similar mews style approach rising up to 25 feet, and cutting through to the other side of the building to meet a smaller eastern plaza connecting to the aforementioned 354 Union. Off of this facing Green street on the northwest end will be a 5,900-square-foot retail space, and a smaller 3,290-square-foot retail space will connect to the rising plaza.
This first floor will also contain the tenant lobby and entrance to the parking garage. Above this will be the second floor acting more as a mezzanine, with a large 10,700-square-foot and 1,700-square-foot retail spaces flanking the covered walkway. Above that, floors three through seven will be fully dedicated to 276 vehicle parking spaces along with bicycle parking spaces servicing the 676,000 square feet of office space above. Hoping to cash in on the corporate growth of the area, the tower will add plenty of space for a trophy tenant who will loom over the main highway.
The floors themselves will offer 45-foot spans between columns with private southern facing terraces on each, varying from 29,500 to 34,600 square feet depending on the level. Tenants will have a variety of amenities most likely including a wellness center and a lounge with terrace on the 15th floor as the tower sets back. There will also be a 29th-floor retail space with an outdoor deck, most likely to be used by a rooftop restaurant facing the city with views that will be hard to be blocked due to placement.
The whole thing will be clad in an architectural glass and metal panel system with copper coated fins and framing, with pronounced mullions on the parking levels and a curtain wall at the base with wood panel accents. The project will be presented to the committee next week on the 14th along with the two previously covered towers, it will then require a zoning change and city council approval prior to a groundbreaking with no construction timeline currently known.