Building Setbacks & Zoning in Rock Island County, IL (2026)
2 rules for unincorporated Rock Island County, Illinois.
Verified from official government sources
Setback Rules
In the R-1 Single-Family Dwelling District of unincorporated Rock Island County, a one- to one-and-a-half story house needs at least a 25-foot front yard, 8-foot side yard, and 35-foot rear yard on a 7,500-square-foot lot. Lots without central sewer must be 20,000 square feet with a 40-foot front setback.
Rock Island County R-1 Yard Setback Minimums
Some RestrictionsRock Island County Code of Ordinances § 154.175
The following minimum requirements shall be met for primary structures. Accessory structures shall meet the requirements of § 154.039. Number of Stories / Lot Area (sq. ft.) / Lot Width / Front Yard Depth / Least Side Yard Width / Side Yard Sum Width / Rear Yard Depth All* 20,000 / 100 feet / 40 feet / 15 feet / 30 feet / 40 feet 1 to 1-1/2 7,500 / 75 feet / 25 feet / 8 feet / 20 feet / 35 feet...
Structure Height Limits
In the R-1 Single-Family Dwelling District of unincorporated Rock Island County, a house cannot exceed two and one-half stories or 35 feet, and detached garages and sheds are capped at one story or 15 feet under Section 154.174.
Rock Island County R-1 Building Height Limit
Some RestrictionsRock Island County Code of Ordinances § 154.174
No principle structure shall exceed two and one-half stories or 35 feet in height. No accessory structure shall exceed one story 15 feet in height, except as provided in §§ 154.070 and 154.071.
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