5 rules for unincorporated Champaign County, Illinois.
Verified from official government sources
Illinois has no statewide ADU mandate. The City of Champaign legalized one accessory dwelling unit per residential lot in June 2022, capped at 600 or 800 square feet by lot size.
A backyard shed is an accessory structure in Champaign County. In the City of Champaign a detached accessory building must sit at least 10 feet off the rear line and 6 feet off the side; larger sheds need a building permit.
Converting a garage into living space in Champaign or Urbana is a change of occupancy that requires a building permit. The city checks egress, insulation, and smoke and carbon-monoxide alarms.
Champaign County requires permits for carport construction. Setback requirements, height limits, and lot coverage maximums apply.
Champaign County regulates tiny homes differently based on whether they are on a permanent foundation or on wheels. Zoning and minimum square footage requirements apply.
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Champaign County Ordinance Hub →