How to Petition for Conservatorship in Illinois

The first thing to know is a vocabulary point that trips up almost everyone: Illinois does not use the word conservatorship. What other states call a conservatorship, Illinois calls guardianship of an adult with a disability. You petition the probate court to be named guardian of the person, guardian of the estate, or both. Which role you need depends on whether you have to make personal decisions, financial decisions, or a mix of the two for an adult who can no longer make them.

The process is court-driven and protective by design, because it takes legal rights away from an adult. That means a formal petition, a doctor's report, notice to the person and their family, a court-appointed investigator, and a hearing. Knowing the steps and the standard before you file saves time and avoids a petition that gets bounced.

Conservatorship in Illinois Means Guardianship

Illinois splits the authority you are seeking into two kinds of guardianship.

When a court adjudges an adult to be a person with a disability, it can appoint one of two kinds of guardian, or both.^[1] A guardian of the person handles personal and medical decisions, while a guardian of the estate handles finances and property. What people usually mean by conservatorship, control over an incapacitated adult's money, is a guardian of the estate in Illinois. The court appoints based on clear and convincing evidence of what the person actually cannot do. This is the adult track of guardianship, and the general rules for adult guardianship in Illinois apply throughout.

Before You File: Is a Guardianship Even Necessary?

Illinois requires guardianship to be a last resort, not a first move.

The court can order guardianship only to the extent the person's actual limitations require, and it must favor the least restrictive option. If the adult still has capacity and signed a power of attorney for health care or property, or if a trust already manages their assets, a full guardianship may be unnecessary. That caution runs through all of guardianship in Illinois, and a court will ask whether a less restrictive tool would work before it strips someone's decision-making rights.

The Petition Process, Step by Step

Step 1: File the Petition for Adjudication of Disability

You file the petition in the probate court of the county where the adult resides.^[2] The petition has to name the alleged person with a disability, state their date of birth and residence, list their nearest relatives, name the proposed guardian, and identify anyone already acting under a power of attorney.^[3] Once filed, it cannot be dismissed or withdrawn without the court's permission.

Step 2: The Evaluation Report

A written evaluation report is the medical backbone of the case, but it does not have to be attached the day you file. It should accompany the petition, and if it does not, the court orders an evaluation and the report must be filed at least 10 days before the hearing.^[4] At least one evaluator must be a licensed physician, working from an evaluation done within three months before filing, or, when the disability is an intellectual disability, a clinical psychologist based on an evaluation within the past year. Many counties provide a standard form.

Step 3: Notice and a Guardian ad Litem

The alleged person with a disability must be personally served and given written notice of their rights, and in nearly every case the court appoints a guardian ad litem to meet with them and report on their best interests.^[5] The person has the right to a lawyer, the right to be present, and the right to demand a jury of six. This is where the process protects the individual from an unwanted or unnecessary guardianship.

Step 4: The Hearing

At the hearing, you have to prove the disability by clear and convincing evidence. The judge decides whether to appoint a guardian, whether it should cover the person, the estate, or both, and whether it should be limited or plenary. The full guardianship petition process follows this same core sequence, so the general process page walks through the filing mechanics in more detail.

Step 5: Letters of Office

If the court grants the petition, it issues letters of office, the document that proves your authority to act. A guardian of the estate often has to file a bond and, later, periodic accountings, while a guardian of the person reports on the ward's wellbeing. Your authority begins with those letters, not with the judge's oral ruling. Unless an exemption or court-approved good-cause waiver applies, the guardian must complete the required training program and file a certificate of completion within one year after the letters of guardianship are issued. Failure to comply may lead to enforcement proceedings or other action by the probate court.^[6]

Limited vs. Plenary Guardianship

Illinois would rather give you only the authority you actually need.

A plenary guardian has full authority over the person or the estate. A limited guardian gets only the specific powers the court spells out, leaving the adult in control of everything else. When the person keeps some capacity, the court will often prefer a limited guardianship, consistent with the least-restrictive rule.

When It Is Urgent

If the adult faces immediate harm, you may not be able to wait for the full process.

When there is an immediate risk to the person or their assets, Illinois lets a court appoint a temporary guardian while the main case is pending, under 755 ILCS 5/11a-4.^[7] This is what people often call emergency guardianship, but it is not a separate or faster statutory track. It is the same temporary-guardianship process: on a showing that the adult or the adult's estate faces immediate harm, the court may appoint a temporary guardian with only the powers named in the order. The appointment generally expires within 60 days, or when a regular guardian is appointed, subject to the statute's limited extension provisions.

How Sterling Lawyers Handles Guardianship Petitions in Illinois

A guardianship petition is part paperwork and part proof: the right filings, the physician's report, and evidence that clears the clear-and-convincing bar without asking for more control than the person actually needs.

Sterling Lawyers works on fixed-fee pricing, so you know the full cost of the petition before you hire us, not a meter that runs through the report, the hearing, and the letters of office.

Because Sterling handles guardianship matters across Illinois and Wisconsin, your case is worked by people who file these petitions regularly and know what each county's probate court expects.

What to Do Next

If an adult in your life can no longer manage their health or finances, start by arranging a physician's evaluation and gathering the family and financial details the petition requires, because the case does not move without them. To file correctly the first time and ask only for the authority the court will actually grant, talk with the team at Sterling Lawyers about the person's situation and which type of guardianship fits.