Oak Lawn, IL Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- R-1 front yard
- 25 ft minimum
- R-1 side yard
- 5 ft or 10% of width
- R-1 rear yard
- 30 ft or 20% of depth
- Corner side yard
- 15 ft or block average
- R-2 side yards
- 5 ft, 20% combined min
Summary
Oak Lawn's R-1 single-family zoning sets a minimum 25-foot front yard, side yards of at least 10% of lot width or 5 feet, and a rear yard of 30 feet or 20% of lot depth, whichever is smaller.
1. Front Yard: There shall be a front yard having a depth of not less than twenty five feet (25')... 2. Side Yards: ...there shall be a side yard on each side of the lot of not less than ten percent (10%) of the width of the lot or five feet (5'), whichever is greater... 3. Rear Yard: ...there shall be a rear yard having a depth of not less than thirty feet (30') or twenty percent (20%) of the depth of the lot, whichever amount is smaller.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-15: Code current through: Ord. 26-09-22, passed April 28, 2026).
Full Breakdown
Oak Lawn Village Code section 4-5A-3 sets R-1 single-family yard minimums: a 25-foot front yard (which can shrink toward the neighborhood average, capped at 30 feet, on partly built blocks), side yards equal to 10% of lot width or 5 feet, whichever is greater, and a rear yard of 30 feet or 20% of lot depth, whichever is smaller. Corner lots owe a street-side yard of 15 feet or the block's average setback. The R-2 multi-family district, section 4-5B-3, keeps the same 25-foot front and 30-foot rear yards but sets side yards at a flat 5 feet with a 20% combined minimum.
Violations & Fines
The Department of Quality Control enforces yard setbacks through building permit review; a structure built into a required yard is a zoning violation subject to a stop-work order or removal.
Frequently Asked Questions
How close to my front lot line can I build in Oak Lawn?
Are side yard setbacks the same in every Oak Lawn zoning district?
Sources & Official References
Other rules in Oak Lawn
Compare Oak Lawn to another location·View the Illinois building setbacks & zoning overview
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Setback Rules in Nearby Cities
How other cities in Cook County handle setback rules.