Chicago's Zoning Ordinance (Title 17, Section 17-2-0300) sets maximum building heights that vary by zoning district, from 30 feet in RS1 to no fixed limit in some downtown districts (subject to FAA clearance).
Building heights in Chicago are controlled by zoning district under Title 17. RS1 zones allow up to 30 feet; RS2 up to 30 feet; RS3 up to 35 feet. Multi-unit residential districts (RT, RM) allow progressively greater heights. Business and commercial districts vary widely. Downtown (D) districts may allow heights of 40+ stories depending on the specific subdistrict and planned development approval. All structures must comply with FAA height restrictions near airports (O'Hare and Midway). Height is measured from average ground level to the highest point of the building. Accessory structures in rear setbacks are limited to 15 feet. The Floor Area Ratio (FAR) further controls building bulk. Planned developments may receive height bonuses in exchange for public benefits.
Exceeding zoning height limits without approval carries fines of $250 to $1,000 per day. Non-conforming construction may require modification or demolition.
Chicago, IL
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Side-by-side rule comparisons with other cities in Cook County.
See how other cities in Cook County handle structure height limits.
See how Chicago's structure height limits rules stack up against other locations.
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