Who Owns My Building in Chicago?

Chicago rental buildings are frequently held by an LLC or land trust rather than an individual, which can make it genuinely hard to know who you're actually renting from. The good news: Cook County's property records are public and free to search. This guide walks through how to find the real owner of record.

This is educational information, not legal advice.

Start with the Cook County Assessor

The Cook County Assessor's Office maintains free, searchable property records for every parcel in the county, including Chicago. Search by address to find the property's PIN (Property Index Number) — a unique 14-digit identifier — along with the current owner name on file and basic property characteristics.

Confirm with the Cook County Recorder of Deeds

Once you have the PIN (or the address), the Cook County Clerk's Recorder of Deeds property records search lets you look up the actual recorded deed — the legal document that transferred ownership — which shows exactly who holds title and when they acquired it. This is the more authoritative source if the Assessor's owner name looks outdated or unclear.

What to do if the owner is an LLC

Many Chicago rental buildings are owned by an LLC (often named something generic, like "123 W Address LLC") rather than a person, which is legal and common — but it makes identifying the actual person behind the building harder. To dig further:

• Search the Illinois Secretary of State's business entity database for the LLC's name to find its registered agent — often a lawyer or registered-agent service, but sometimes the actual owner's name or a management company.
• Check for a property manager. If the LLC's registered agent is a law firm or corporate service, look for a property management company handling day-to-day operations — that's often your practical point of contact even if it's not the legal owner.
• Cross-reference multiple properties. If the same LLC or registered agent shows up on several nearby buildings, that can indicate a larger landlord operating under multiple entity names.

Why this matters for RLTO coverage

Knowing who owns your building — and specifically, whether they actually live there — matters for more than curiosity. Chicago's RLTO exempts owner-occupied buildings with 6 units or fewer from most of its tenant protections, including the security-deposit interest requirement (see our RLTO coverage guide). Confirming ownership can help you figure out whether that exemption applies to your unit.

Frequently asked questions

Is it free to look up who owns a building in Chicago?

Yes — both the Cook County Assessor's property search and the Recorder of Deeds' document search are free and public.

Who is my landlord if my building is owned by an LLC?

The LLC itself is the legal owner. To find the person or company actually behind it, check the Illinois Secretary of State's business entity database for the LLC's registered agent, and look for a property management company handling the building day to day.

How do I use this to confirm RLTO coverage?

Ownership records can help confirm whether your building is owner-occupied and how many units it has — the two factors that determine the RLTO's owner-occupied, 6-units-or-fewer exemption. See our RLTO coverage guide for the full exemption list.

Can CertRent look this up for me automatically?

Yes — use our free Who Owns My Building tool to search an address directly instead of navigating the county sites yourself.

Ready to check a specific address? Use our free Who Owns My Building tool.