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

183 HEIGHT AND AREA REGULATIONS is the table that fixes minimum lot area, lot width, and yard setbacks for each of the county's zoning districts in the unincorporated area. For the R1 Single Family Residential District, the table requires a one-acre minimum lot, 100-foot minimum lot width, a 35-foot front yard, 15 feet per side yard (20 feet total for both sides), and a 50-foot rear yard, alongside a 35-foot maximum building height and 30% maximum lot coverage. The numbers shift by district: A1 Agricultural and RE5 Single Family Estate both require a 50-foot front yard and 100-foot total side yard on their larger minimum lots, while B1 Neighborhood Shopping drops to a 35-foot front yard and 20-foot total side yard, and the setbacks increase again wherever a business or industrial district is adjacent to a residential district, reflecting the buffer the county requires between incompatible uses.

052 backs the table with a continuing-obligation rule: once a yard meets the minimum, it stays legally required for as long as the building exists, and it cannot be sold off, subdivided away, or borrowed to satisfy another building's yard requirement. 052(E). The Planning and Zoning Department checks proposed setbacks against this table when it reviews a zoning certificate or building permit application.