ADU Rules: Schaumburg vs Skokie
How do adu rules rules compare between Schaumburg, IL and Skokie, IL?
Schaumburg and Skokie have similar restriction levels.
Schaumburg, IL
Cook County
Schaumburg's zoning ordinance does not broadly permit accessory dwelling units (granny flats, in-law suites) as a by-right use in most residential zoning districts. Illinois does not have a statewide ADU mandate. Creating a separate dwelling unit within or adjacent to a single-family home generally requires a zoning variation or special use permit. Conversions that add a kitchen to create a second independent living unit are typically not permitted without zoning relief.
View full Schaumburg rules →Skokie, IL
Cook County
Skokie's zoning code does not broadly permit accessory dwelling units (ADUs) in single-family residential districts. Two-flat and multi-family zones permit multiple dwellings by right. Some legacy in-law arrangements exist but new ADUs are generally not permitted without a zoning variance. The Village has studied ADU policy but has not adopted a broad authorization ordinance as of the most recent code updates.
View full Skokie rules →Key Facts Comparison
| Fact | Schaumburg | Skokie |
|---|---|---|
| By-Right ADUs | Not permitted in most zones | - |
| State Mandate | Illinois has no ADU mandate | - |
| Approval Path | Variation or special use permit | - |
| Key Trigger | Adding a kitchen creates second unit | - |
| Review Body | Zoning Board of Appeals/Plan Commission | - |
| Single-Family Zone | - | ADU not permitted |
| Two-Flat Zones | - | Multi-unit by right |
| Variance Required | - | ZBA discretionary process |
| Compare Evanston | - | Allows ADUs |
| Compare Chicago | - | Allows ADUs in pilot areas |
Highlighted rows indicate differences between cities.
Schaumburg FAQ
Can I build a granny flat in my backyard in Schaumburg?
Not by right. Schaumburg's zoning generally allows only one dwelling unit per single-family lot. A detached ADU would require a variation or special use permit from the Zoning Board of Appeals, and approval is not guaranteed.
Can I add an in-law suite to my house?
You can add a bedroom, bathroom, and living area for family members, but adding a separate kitchen creates a second dwelling unit under the zoning ordinance, which is not permitted by right. Consult the Community Development Department before planning.
Does Illinois require cities to allow ADUs?
No. Unlike California and other states, Illinois does not have a statewide ADU mandate. Each municipality sets its own rules. Schaumburg currently restricts ADUs in most residential zones.
Skokie FAQ
Can I build an ADU on my Skokie property?
Generally no in single-family zones without a zoning variance. Two-flat and multi-family zones permit multiple dwellings. Unlike Evanston and Chicago, Skokie has not adopted a broad ADU authorization ordinance.
What about a basement apartment for a family member?
An independent second dwelling unit with its own cooking, sleeping, and bathroom facilities is not permitted in single-family zones. Shared family living within one household is allowed; a separately rented unit is not.
Could Skokie adopt ADU rules in the future?
Possibly. The Plan Commission has discussed ADU policy in the context of housing needs. Follow Village Board agendas and Plan Commission notices for developments.
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