Chicago Construction News staff writer
The Chicago City Council has approved an ordinance expanding the construction of additional dwelling units (ADUs) in single-family residential districts across 28 wards, creating 12 new districts where the development will now be legal.
An amendment to the city-wide ADU Expansion ordinance allows homeowners in previously restricted areas to add accessory units, providing a path for gentle density in parcels zoned for single-family homes. The measure is expected to increase housing options and support multigenerational living while addressing Chicago’s affordable housing shortage.
“I’m proud to see the City Council pass an ordinance today that builds on our work to legalize additional dwelling units and create much needed affordable housing,” said Ald. Bennet Lawson. “By legalizing ADUs across single-family home areas, we are sending a strong message that we will use bold, creative solutions to address the housing crisis facing our residents.
“Before the ordinance goes into effect in April, we look forward to adding single-family home areas in additional wards to the program.”
First passed in September 2024, Ordinance SO2024-0008918 legalized ADU construction in all non-single-family residential, business, and C1 and C2 commercial districts. The original framework allowed alderpeople to opt-in RS districts in their wards. The new expansion adds areas previously excluded under pilot programs and will go into effect April 1.
Department of Housing Commissioner Lissette Castañeda said the expansion “will empower homeowners and provide more housing options, all without displacement or changing neighborhood character.”
“Today’s action is a testament to our collective will to make housing a human right for all,” said Mayor Brandon Johnson. “The Johnson administration plans to continue streamlining development through its Cut the Tape initiative, reducing regulatory barriers and speeding construction across the city.”
The ordinance allows for varying limitations depending on community and aldermanic preference, with the city signaling potential further expansion in additional wards in the future.
