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Chicago, IL Rent Increase Laws 2026

Illinois has no rent cap but Landlords must give 30 days' notice before raising rent. Wrong notice = void increase.

In Illinois, there is no statewide rent cap. Landlords must provide 30-day written notice before any increase takes effect. An increase without proper notice is void.

Key Takeaways — Chicago Rent Increase Laws

  • Notice required: 30 days before increase
  • Wrong notice: Entire increase is void

Rent Increase Laws in Chicago

Chicago landlords must follow Illinois state law on rent increase laws. Understanding the specific rules, deadlines, and penalties can prevent costly violations.

30 days

notice required

Penalty Warning

Violate Illinois rent increase laws rules in Chicago and you could have your increase voided. At Chicago's median rent of $1,781/month, even a single violation adds up fast.

Don’t risk it. Let LeaseBase handle the compliance.

LeaseBase automatically calculates your maximum increase, generates compliant notices, and tracks delivery deadlines — so you never miss a deadline.

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Rent Increase Laws in Nearby Cities

Own properties in multiple cities? Rules may differ locally:

Cicero, IL
Pop. 81,004
Oak Park, IL
Pop. 52,055
Berwyn, IL
Pop. 54,414
Forest Park, IL
Pop. 13,660
Lincolnwood, IL
Pop. 12,872

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How we researched this page: Rent increase laws rules are based on Illinois state statutes. Rent data comes from HUD Fair Market Rents (FY2026) for Cook County. Last updated: August 2026.
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Reviewed by Rachid Abadli

Founder & CEO, LeaseBase · Sacramento landlord · Self-managing since 2019

LeaseBase is a property management platform — not a law firm. Consult an attorney for legal advice specific to your situation.