No. This is one of the biggest advantages of adult adoption. Since the adoptee is a legal adult (18+), only their consent is required — the biological parent has no say in the matter.
In Illinois, adult adoption:
- Requires only the consent of the adult being adopted
- Does NOT require biological parent notification or consent
- Does NOT require a home study or background check
- Is filed in Circuit Court
- Typically finalizes in 4-8 weeks
This means an adult stepchild can be adopted regardless of the biological parent's wishes. Many families choose adult adoption specifically because the biological parent would have objected when the child was a minor.
The cost is the same $349 for our document preparation, and we deliver everything within 24 hours.
Adult adoption in Illinois at a glance
- Court
- Circuit Court
- Typical timeline
- 4-8 weeks
- Court filing fee
- Confirm the adult-adoption filing fee and any copy charges with your court.
- Illinois families we've helped
- 1,101
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Page layout updated . Individual answers have different research histories. This is general information; court requirements and individual circumstances can differ. Document preparation service, not a law firm.
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