Kankakee County, IL Building Setbacks & Zoning: Lot Coverage Limits (2026)

Sec. 121-146 sets the dimensional standards for the R1 district, which the code describes as designed to conserve existing good residential areas and regulate the efficient use and orderly development of vacant land for residential uses. 2, subsection (g) states that lot coverage shall not exceed 30 percent of the lot size, and subsection (h) limits building height to not more than two and a half stories or 35 feet, whichever is lower. These coverage and height limits sit alongside the district's setback requirements of 30 feet in front, six feet on an interior side, 30 feet on a side adjoining a street, and 40 feet in the rear, and its minimum lot sizes, which range from 9,000 square feet where the lot has both public water and sewer up to 30,000 square feet where the home relies on an individual well and septic system.

2 floor area ratio, and two-and-a-half-story or 35-foot height limit reappear in the A2 Agriculture Estate district under Sec. 121-100, so a homeowner moving between R1 and A2 zoning faces the same building-envelope math. The county planning department's building and zoning division checks these figures against site plans as part of ordinary building permit review before construction begins.