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. |