Garage Conversions: Chicago vs Schaumburg
How do garage conversions rules compare between Chicago, IL and Schaumburg, IL?
Chicago has fewer restrictions than Schaumburg.
Chicago, IL
Cook County
Chicago authorizes garage conversions to coach houses (detached ADUs) and conversion units (attic/basement ADUs) under the Additional Dwelling Unit Ordinance. The pilot ordinance (effective May 2021) was made permanent and city-wide by Ordinance SO2024-0008918, which the City Council passed 46-0 on September 25, 2025, with permits accepted starting April 1, 2026. ADUs are now allowed in single-family zones within the original pilot areas plus all multifamily zones citywide (except downtown).
View full Chicago rules →Schaumburg, IL
Cook County
Schaumburg's zoning ordinance requires residential properties to maintain minimum off-street parking. Converting a garage to living space eliminates required parking and is generally not permitted unless replacement parking is provided. Converting a garage into a separate dwelling unit is subject to ADU restrictions. Any conversion requires building permits for structural, electrical, plumbing, and mechanical work to meet habitable space standards.
View full Schaumburg rules →Key Facts Comparison
| Fact | Chicago | Schaumburg |
|---|---|---|
| Ordinance | SO2024-0008918 (passed 9/25/2025) | - |
| Effective Citywide | April 1, 2026 | - |
| Coach House Height | 22 ft max; rear 50% of lot | - |
| Parking | No additional spaces required | - |
| Labor Standard | Reg. Apprenticeship Program (coach houses) | - |
| Parking Requirement | - | 2 enclosed spaces typically required |
| Conversion Allowed | - | Only if replacement parking provided |
| Building Permit | - | Required for all conversions |
| Ceiling Height | - | Minimum 7 feet for habitable space |
| Dwelling Unit | - | Not permitted without ADU approval |
Highlighted rows indicate differences between cities.
Chicago FAQ
Can I legally convert my Chicago garage to a coach house?
Yes, in eligible zones. As of April 1, 2026, Chicago's permanent Additional Dwelling Unit Ordinance (SO2024-0008918) allows coach houses citywide in single-family zones within the original pilot areas plus all multifamily zones (except downtown), with a 22-foot height limit in the rear 50% of the lot.
Do I need a permit to remodel or convert my Chicago garage to living space?
Yes. The Chicago Department of Buildings requires a building permit for any change of use from garage to habitable space, with plan review under Title 14X (Chicago Building Code). For ADU/coach house conversions, a pre-certification from the Department of Housing is required first.
Do I need additional parking after converting my Chicago garage?
No. The Additional Dwelling Unit Ordinance does not require additional off-street parking when adding an ADU, even when the conversion eliminates an existing garage.
Schaumburg FAQ
Can I convert my garage to a bedroom in Schaumburg?
Generally not without providing replacement enclosed parking to meet the zoning minimum. If you can build a new detached garage or demonstrate compliant alternative parking, conversion may be possible with building permits.
What building code requirements apply to garage conversions?
The space must meet habitable space standards: minimum 7-foot ceiling height, natural light and ventilation, insulated walls and floor, proper egress windows in bedrooms, smoke and CO detectors, and HVAC. All trades require separate permits.
Can I convert my garage into a rental apartment?
Creating a separate dwelling unit with its own kitchen requires ADU approval, which is generally not permitted by right in Schaumburg's residential zones. You would need a variation or special use permit from the Zoning Board of Appeals.
Compare other topics
See how Chicago and Schaumburg compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool