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DX-3 Downtown Mixed-Use District

Downtown high-rises - offices or apartments - with ground-floor stores. Prevalent on the edges of Loop: east of Dearborn Ave, in River North, the South Loop, and the West Loop.


Zoning Ordinance reference ยง 17-4-0103
View the Chicago Zoning Ordinance
Floor area ratio 3
Maximum building height None, but buildings taller than city's "building height thresholds" require Planned Development review.
Lot area per unit (density) 400 sq ft/dwelling unit, 300 sq ft/efficiency unit, 200 sq ft/SRO unit
Minimum lot area
On-site open space All buildings with people living in them must have at least 36 sq ft of on-site open space per dwelling unit. (See 17-4-0410-A)


Front yard None
Side None
Back yard 30ft for floors containing dwelling units. All others, none.