Kendall County, IL Building Setbacks & Zoning: Setback Rules (2026)

Kendall County Code Section 36-332 fixes yard requirements for the R-1 One-Family Residential District, the zoning applied to unincorporated residential lots outside the cities and villages. The front yard rule scales with the road: a building must sit 150 feet from the roadway centerline (or 100 feet from the right-of-way, whichever is greater) when fronting a Federal, State or County roadway, but only 50 feet from the right-of-way or access easement on a township or private road. The code adds an averaging exception for private-road frontage: where half the lots on the same block face have already been developed with front yards varying no more than 10 feet from one another, that average becomes the minimum front yard for the rest of the frontage, though the required front yard can never exceed 50 feet under that averaging rule.

Side yards must be at least 50 feet on each side of the zoning lot, and the rear yard must also be at least 50 feet. These figures apply to R-1's very low density residential lots, which under the companion lot-size section must run at least 130,000 square feet with 200 feet of width at the building line; special uses get their own setbacks fixed in the special use permit rather than these baseline figures.