29-story mixed-use development approved for the West Loop


Chicago Construction News staff writer

Chicago city council has approved a mixed-use development at 357 N Green Street in the West Loop. A former parking lot will be transformed by the Canadian-developer Onni Group.

Solomon Cordwell Buenz (SCB) is the project architect and Confluence is completing the landscape design around the 29-story tower which will be built diagonally on the 60,000 square-foot lot, allowing for a 40,000 sq. ft. built area and a plaza and paseo.

The development includes 8,000 sq. ft. of commercial space and a five-story parking garage with translucent glass facade with bronze vertical fins every 30-inches.

There will be 650,000 sq. ft. of office space, accentuated by private balconies and outdoor spaces and the tower will feature a curtain wall system, clad in glass and bronze vertical fins, that will culminate in a “simple crown” concealing mechanical equipment.

With city council’s approval, Onni Group can set a date to start construction – their first office tower in Chicago in recent years. The firm is currently in negotiations with potential anchor tenants that could occupy a majority of the structure and has targeted the fourth quarter of 2024 for construction launch.

The site will undergo rezoning from M2-3 to DX-7, followed by a planned development process. In exchange for a Floor Area Ratio (FAR) bonus, the developers will contribute about $4.9 million to the Neighborhood Opportunity Fund.


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