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Author: Mark Ainely | Partner GC Realty & Development & Co-Host Straight Up Chicago Investor Podcast
If you own rental properties anywhere in Chicagoland, you have almost certainly heard the acronyms RLTO and RTLO thrown around. Both ordinances govern the landlord-tenant relationship in their respective jurisdictions, and both carry real teeth in the form of penalties, class action exposure, and tenant termination rights. Understanding exactly where they overlap and where they diverge is not optional knowledge for serious investors. It is table stakes.
Which Ordinance Covers Which Area?
Before we get into the differences, let's establish the playing field.
The Chicago Residential Landlord and Tenant Ordinance (RLTO) governs rental properties located within the city of Chicago. If your property has a Chicago address, you follow the RLTO and you are exempt from Cook County's ordinance entirely.
The Cook County Residential Tenant Landlord Ordinance (RTLO) was adopted effective June 2021 and applies to rental properties in suburban Cook County, meaning towns, villages, and cities in Cook County that are not Chicago and do not have their own comprehensive local ordinance. Three notable suburbs are generally considered exempt because they maintain their own robust landlord-tenant ordinances: Oak Park, Evanston, and Mount Prospect. If your property is in one of those three, you follow that municipality's local rules.
For investors in the collar counties (DuPage, Lake, Will, Kane, McHenry), there is currently no comprehensive county-wide ordinance like the RLTO or RTLO. You may encounter crime-free ordinances in certain municipalities, but nothing that governs the full scope of the landlord-tenant relationship the way these two do.
If you own in suburban Cook County and you are not yet familiar with the RTLO, this article is your starting point. The class action liability that Chicago landlords have faced for decades is now squarely on the table for Cook County suburban landlords as well.
Key Takeaways
Before we dig into the details, here is a quick summary of the five differences covered in this article:
Cook County caps security deposits at 1.5 times monthly rent and allows installment payment plans. Chicago has no cap and no payment plan requirement.
Cook County landlords have 30 days to return a security deposit after move-out. Chicago landlords have 45 days.
Chicago gives landlords two exceptions to the two-day access notice requirement. Cook County only allows one, emergencies, and penalizes improper entry on a per-incident basis.
Chicago uses a tiered fair notice system for non-renewals and rent increases, going up to 120 days for long-term tenants. Cook County requires a flat 60 days with a 120-day penalty if you miss the window.
Cook County has codified, enforceable standards for how landlords must adopt community rules. Chicago has no equivalent provision in the RLTO.
Difference 1: Security Deposit Caps and Payment Plans
Cook County RTLO
Security deposits are capped at one and a half times the monthly rent. A two-month security deposit is not permitted. Additionally, if a tenant requests a payment plan for the portion of the security deposit that exceeds one month's rent, you must allow them to pay that remainder in six equal monthly installments over the first six months of the lease.
Chicago RLTO
There is no cap on the security deposit amount. You can collect two months, three months, or whatever amount your lease specifies. There is also no payment plan requirement.
Why This Matters
Many suburban Cook County landlords have been collecting two-month security deposits for years as standard practice. Under the RTLO, that is a strict liability violation. You do not get a chance to fix it after the fact. The penalty is two times the security deposit amount plus attorney's fees. If you have been using the same lease form across both your Chicago and suburban Cook County properties, this is a critical compliance gap to close immediately. Reviewing and updating your lease agreements is one of the highest-leverage steps a suburban Cook County investor can take right now.
Difference 2: Security Deposit Return Timelines
Cook County RTLO
After a tenant vacates, you have 30 days to return the security deposit or provide an itemized statement of deductions along with paid receipts for any repairs.
Chicago RLTO
You have 45 days after the tenant vacates to return the deposit or provide deductions with documentation.
Why This Matters
Fifteen days may not sound like much, but if you are managing multiple turnover units and waiting on contractors to complete repairs, 30 days goes fast. If you cannot provide paid receipts within that window, you lose the ability to deduct repair costs from the deposit and must return the full amount. Your remedy at that point shifts to a separate lawsuit against the tenant. Calendar your vacate dates, start your repair process immediately at move-out, and do not wait on contractors in Cook County suburbs. You have less runway than you do in the city.
Difference 3: Landlord Access and Notice Exceptions
Both ordinances require you to give two days prior notice before entering a tenant's unit for inspections, repairs, showings to prospective buyers or tenants, or any other standard purpose. Access must occur between 8:00 a.m. and 8:00 p.m. unless the tenant agrees otherwise.
Cook County RTLO
Only a genuine emergency excuses the two-day prior notice requirement. If you enter due to an emergency, you must provide written notice to the tenant within two days after the fact. There is no other exception. Cook County also penalizes improper entry on a per-incident basis, meaning every unauthorized entry is treated as a separate violation.
Chicago RLTO
Chicago gives landlords two scenarios where prior notice is not required. The first is a genuine emergency. The second is when repairs elsewhere in the building require access to the specific unit, for example a contractor working on shared electrical systems who needs to access a junction inside a tenant's space. In both cases, written notice must follow within two days after entry.
Why This Matters
The per-incident penalty structure in Cook County is what separates this from a minor technicality. Each unauthorized entry can carry a penalty of one to two months' rent plus attorney's fees. If a contractor enters a Cook County unit multiple times in one day without proper notice, a tenant could argue those are separate violations with separate penalties. In Chicago, multiple entries related to the same work on the same day are generally treated as one incident. Proper notice protocols are not just good manners in Cook County. They are financial risk management.
Difference 4: Non-Renewal and Rent Increase Notice Requirements
Both ordinances now include fair notice provisions that require landlords to give advance written notice before non-renewing a lease, terminating a month-to-month tenancy, or increasing rent at renewal. The mechanics differ significantly between the two jurisdictions.
Cook County RTLO
You must give at least 60 days notice before the end of the lease if you intend not to renew, or 60 days notice to terminate a month-to-month tenancy. If you miss that 60-day window, the tenant is entitled to 120 days from the date you finally serve the notice, and they may remain at the same rental rate during that entire extended period.
Chicago RLTO
Chicago uses a tiered system based on how long the tenant has lived in the unit. Tenants with less than six months of tenancy require 30 days notice. Tenants between six months and three years require 60 days. Tenants who have lived in the unit for more than three years require 120 days notice, which is four full months. Each tier also carries an extended penalty period if you miss the original deadline.
Why This Matters
Chicago landlords with long-term tenants need to be planning non-renewals and rent increases well over four months in advance. This is not a last-minute decision anymore. Missing the deadline does not just delay your outcome. It extends the tenant's protected stay and locks in the existing rent for the entire duration of the notice period. Setting up a lease renewal and notice tracking system for every unit in your portfolio is one of the most practical steps you can take to protect your cash flow under both ordinances.
Difference 5: Community Rules and Regulations
Cook County RTLO
Cook County spells out explicit requirements for community rules. Rules must be in writing, must serve the convenience, safety, or welfare of tenants, and must apply uniformly and fairly to all tenants. They must be written clearly enough that a tenant can understand what is required or prohibited. Rules cannot be used to circumvent lease obligations, to impede tenants' rights to communicate with each other including on social media, or to substantially modify the terms of the lease after the fact. Attempts to do any of those things through a rules addendum are not enforceable.
Chicago RLTO
The Chicago ordinance does not contain specific formal requirements for how a landlord adopts or enforces community rules. The general legal standard of reasonableness applies, and courts are unlikely to enforce rules that are arbitrary or have nothing to do with their stated purpose, but there is no prescribed process landlords must follow.
Why This Matters
If you manage buildings in Cook County suburbs and you use a rules and regulations addendum as a catch-all to add restrictions after the fact or to limit tenant organizing, that addendum may be entirely unenforceable under the RTLO. Review your existing rules documents against these standards before you attempt to enforce a violation or use one as grounds for non-renewal. When in doubt, work with a property management team that builds compliant lease packages from the ground up.
Frequently Asked Questions
Does the Cook County RTLO apply to properties in the city of Chicago?
No. Chicago properties are covered exclusively by the Chicago RLTO. Chicago is exempt from the Cook County RTLO. If your property has a Chicago address, you only need to comply with the RLTO.
Which suburbs are exempt from the Cook County RTLO?
Oak Park, Evanston, and Mount Prospect are widely considered exempt because each has its own comprehensive landlord-tenant ordinance that covers most aspects of the landlord-tenant relationship. If you own in any of those three municipalities, you follow the local ordinance rather than the county-wide RTLO.
What happens if I miss the 60-day non-renewal notice deadline in Cook County?
You lose the ability to treat the tenant as a holdover and cannot pursue eviction on that basis. Instead, you must issue a notice that gives the tenant 120 days from the date of that notice to vacate, and they remain at the same rental rate during that entire period.
Can I use the same lease form for my Chicago properties and my suburban Cook County properties?
No, and this is one of the most common compliance mistakes we see. The two ordinances require different summaries attached to the lease, different security deposit provisions, and different disclosures. Using a Chicago lease form in a Cook County suburb, or vice versa, puts you out of compliance from the moment the tenant signs.
What is the penalty for collecting a security deposit over the 1.5x cap in Cook County?
Violating the security deposit cap is a strict liability offense under the RTLO, meaning there is no opportunity to cure the mistake after the fact. The penalty is two times the security deposit amount plus the tenant's attorney's fees.
Do these ordinances apply to commercial properties?
No. Both the RLTO and the RTLO apply exclusively to residential rental units. Commercial leases are not covered. That said, if a residential unit is leased to a corporation for employee housing purposes, it is still treated as a residential lease under these ordinances because a person is living in the unit.
The Bottom Line for Chicagoland Investors
Both the RLTO and the RTLO are serious ordinances with real financial consequences for landlords who are not in compliance. The good news is that they share a significant amount of common ground. The bad news is that the differences outlined above are exactly the kind of nuanced details that create class action exposure when landlords use one-size-fits-all lease forms and management practices across multiple jurisdictions.
If you own in both Chicago and suburban Cook County, you need separate, jurisdiction-specific lease agreements. You need different security deposit processes, different notice timelines, and different rules addenda. This is not bureaucratic busywork. This is asset protection.
Don't Go At This Alone!
At GC Realty and Development, we work with residential and commercial investors across Chicagoland every day. Our team understands the layered complexity of managing properties across multiple jurisdictions, and we have built our processes around keeping our clients protected and compliant.
My personal mission is simple: to help Chicagoland investors build wealth through real estate without getting buried in the details that can quietly erode your returns. You should be growing your portfolio, not worrying about whether your security deposit receipt has the right fields.
Schedule a Consultation with Our Team and let us review your current lease agreements, notice procedures, and property management processes across every jurisdiction where you own.
