Adopting Your Stepchildren

 Posted on April 20, 2026 in Family Law

Blended families are a normal part of life for many in 2026. When a stepparent has taken on a parenting role to their stepchildren, it's natural to want that relationship to be legally recognized. If this is the case for your family, stepparent adoption is the next step. A St. Charles adoption lawyer can walk you through what the process looks like and what to expect.

How Does Stepparent Adoption Work in Illinois?

Illinois handles stepparent adoption under what's called a "related child adoption." This process, outlined in the Illinois Adoption Act (750 ILCS 50/), is different from other types of adoption in a few important ways. For example, because the stepparent already has a relationship with the child, a full home study may not be required.

To get started, the adopting stepparent and their spouse file a petition for adoption with the court. The petition includes information about both adults, the child, and the circumstances of the adoption. After this petition is filed, the court reviews it and does any auxiliary steps (i.e., a home study if needed) before finalizing the adoption.

Once an adoption is finalized, the stepparent becomes the child's legal parent in every sense. The child can take the stepparent's last name and inherit from them. The stepparent takes on full legal parental responsibilities, including financial support.

Does the Other Biological Parent Have to Agree to Stepparent Adoption?

The other biological parent has to consent to the adoption or else have their parental rights ended, making this the biggest bottleneck in the process. Illinois law doesn't allow a child to have more than two legal parents. Biological parents almost always have legal parentage over their children when they are both in the picture.

Because of this, the other biological parent's parental rights have to be ended before the stepparent can adopt their child. This can happen because they've passed away, they voluntarily give up their rights, or a court terminates their rights involuntarily.

Voluntary consent is what it sounds like: the other parent agrees to give up their parental rights. Biological parents sometimes do voluntarily consent to stepparent adoption. Their consent must be in writing and filed with the court.

What If the Other Biological Parent Won’t Consent to Stepparent Adoption?

If the other parent refuses to consent, the only way forward is to prove that their parental rights should be terminated. Illinois law allows for termination on several grounds, including:

• Abandonment of the child
• Failure to pay court-ordered child support without a good reason
• Evidence of abuse or neglect
• Being found legally unfit as a parent

However, terminating a parent’s parental rights who wants to be involved is extremely difficult at best. In Addition, if a child is 14 or older, their own consent is also required. If the child doesn't want to be adopted, the process doesn't go forward.

What Happens If the Other Biological Parent Can't Be Contacted About Adoption?

In some cases, biological parents are completely unreachable. Illinois law still requires that they be given the opportunity to respond before an adoption is finalized.

If the parent can't be located through normal means, notice can be served by publication. This means a notice is published in a local newspaper in the county where the parent was last known to live. This runs for a set period of time. If there's no response, the court can move forward and treat the matter as if that parent has consented to the adoption.

If no father is listed on the child's birth certificate, the adoption may be easier to complete. If this is true of your case, act quickly after the publication period for contacting them has ended. Biological fathers can appear later and seek parental responsibilities or parenting time. Taking steps to complete the adoption sooner rather than later protects your ability to complete the adoption.

How Do I Know If Adopting My Stepchild Is the Right Choice?

Even if you love your stepchild and are eager to legally be their parent, it’s important to remember that stepparent adoption isn't always a straightforward decision. Adoption has emotional implications for everyone involved, especially the child. Be sensitive to the fact that they may still have strong attachments to their other biological parent, even if you feel that person doesn’t do a good job of being a parent.

When a child has a positive relationship with both a stepparent and a biological parent, there may be other legal options worth exploring, such as agreed custody arrangements, that don't require permanently ending one relationship. Talking to an adoption lawyer about your situation is often helpful for these reasons.

Call a DuPage County, IL Adoption Lawyer Today

If you're thinking about adopting your stepchild, who you choose as your legal guide is important. The right lawyer can make a big difference in how smoothly the process goes. Mirabella, Kincaid, Frederick & Mirabella, LLC has decades of experience with family law, including adoptions. To schedule your initial attorney meeting with MKFM Law, call 630-665-7300. Our Wheaton family law attorneys serve clients from our offices located in Kane County, DuPage County, and DeKalb County.