Mixed-use development planned at 315 S. Jefferson

Proposed nine-story building would bring 52 residential units and retail to Chicago site

Apr. 3, 2026 at 2:30pm

A photorealistic studio still life of a sleek, angular high-rise building model made of polished steel and glass, floating on a clean white background and dramatically lit to cast long shadows, representing the complexities of urban development.A conceptual model of the proposed mixed-use development at 315 S. Jefferson highlights the architectural design and urban infill challenges of the project.Jefferson Today

A mixed-use development is in the works at 315 S. Jefferson in Chicago, planned by Jefferson 315 S LLC. The project would feature a nine-story residential building with 52 units, 1,130 square feet of retail space, 22 car parking spaces, and 58 bike parking spaces. The developer is seeking zoning variations to reduce setbacks, parking, and open space requirements.

Why it matters

This project represents continued development and investment in Chicago's downtown area, adding new housing and retail options. However, the requested zoning variations highlight the challenges of building in an urban infill site and balancing development needs with city regulations.

The details

The proposed development at 315 S. Jefferson would replace a surface parking lot with a nine-story, 109-foot-tall mixed-use building designed by Built Form LLC. The building would include 52 residential units, 1,130 square feet of retail space, 22 car parking spaces, and 58 bike parking spaces. The ground floor would feature the retail space and residential lobby, with a parking garage in the rear. Amenities like a fitness center and resident lounge would be on the second floor, while typical residential floors would have 7 units each on levels 3-8 and 6 units on the 9th floor.

  • The project is on the agenda for the Zoning Board of Appeals meeting later this month.
  • If approved, the developer can move forward with permitting and construction, though a timeline has not been announced.

The players

Jefferson 315 S LLC

The developer planning the mixed-use project at 315 S. Jefferson.

Built Form LLC

The architecture firm designing the proposed nine-story residential building.

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What’s next

The Zoning Board of Appeals will consider the developer's requested variations at their meeting later this month. If approved, the project can proceed with permitting and construction, though a timeline has not been announced.

The takeaway

This mixed-use development represents continued investment and growth in Chicago's downtown, adding new housing and retail options. However, the need for zoning variations highlights the challenges of building on urban infill sites and balancing development needs with city regulations.