Stepparent and Relative Adoptions in Idaho

Part of my Idaho Adoption Overview.

By Ronald W. Brilliant, Attorney at Law · Licensed in Idaho, Nevada & California · Last reviewed: September 2026 against the Idaho Code as posted by the Idaho Legislature (July 1, 2026)

In This TopicIdaho AdoptionTopic 4 of 6: Stepparent & Relative

Idaho’s adoption chapter, Chapter 15 of Title 16 of the Idaho Code, does not create a separate procedure for stepparent adoptions or for adoptions by grandparents or other relatives. Apart from the few provisions described below, these adoptions follow the same general rules on who can adopt, consent, and procedure as any other adoption.

This page collects those provisions in one place. Chapter 15 does not use the word “stepparent.” Instead, it refers to an adopting parent who is the “spouse of a natural parent” (Idaho Code § 16-1502) or who is “married to the birth parent” (§ 16-1506(4)).

Rules That Apply to Stepparents

No Age-Gap Requirement

Ordinarily, the person adopting a child must be at least fifteen (15) years older than the child, or be twenty-five (25) years of age or older (Idaho Code § 16-1502). Those age requirements do not apply when the adopting parent is the spouse of a natural parent (§ 16-1502).

Home Study Only if the Court Orders It

Before any child is placed for adoption in a prospective adoptive home, a thorough social investigation (home study) of the family must be completed with a positive recommendation (Idaho Code § 16-1506(4)). When the prospective adoptive parent is married to the birth parent, the social investigation of that parent is completed only upon order of the court (§ 16-1506(4)).

Notice to the Department of Health and Welfare

When a petition to adopt a minor is filed by “a person unrelated to the child or unmarried to a natural parent of the child,” the court must serve a copy of the petition, with a statement of names and addresses, on the director of the Department of Health and Welfare within five (5) days (Idaho Code § 16-1506(4)). For any other adoption petition, serving the director is at the court’s discretion (§ 16-1506(4)). The statute does not further define which petitioners fall into each group.

The Natural Parent’s Role in the Case

A married person who is not lawfully separated cannot adopt a child without the consent of his or her spouse, if the spouse is capable of giving consent (Idaho Code § 16-1503). At the hearing, the spouse of the petitioner must appear before the court along with the petitioner and the child if that spouse is a natural parent of the child (§ 16-1506(1)).

Notice of the adoption must be served on the petitioner’s spouse only if the spouse has not joined in the petition (Idaho Code § 16-1505(1)(c)).

The Other Parent’s Consent

Chapter 15 has no special consent rule for stepparent adoptions. The general list applies, which includes both parents (or the surviving parent) of a child conceived or born within a marriage, and the mother of a child born outside marriage (Idaho Code § 16-1504(1)(b)-(c)). Certain fathers, including an adjudicated father and an unmarried biological father who meets the statute’s requirements, must also consent (§ 16-1504(1)(d)-(e), (h)-(i)).

No consent is needed from a person whose parental relationship has already been terminated under Chapter 16 or Chapter 20 of Title 16, or under like proceedings in a sister state (Idaho Code § 16-1504(8)). Under Chapter 20, either parent may petition to terminate the other parent’s rights (§ 16-2004), and the relationship may be terminated as to one parent without affecting the child’s relationship with the other parent (§ 16-2010(2)(b)).

A termination case and an adoption case may be consolidated and decided at one hearing if all requirements of both chapters are fully met (Idaho Code § 16-1506(5)). In a termination action brought by one parent against the other, the abandoned-infant ground for presuming that termination is in the child’s best interests does not apply (§ 16-2005(2)(c)). See termination of parental rights for the grounds and procedure.

Effect on the Natural Parents

Chapter 15’s general rule is that, from the time of the adoption, the natural parents are relieved of all parental duties and responsibilities toward the adopted child and have no rights over the child, and the child’s rights from and through them, including inheritance, end unless specifically provided by will (Idaho Code § 16-1509). That rule applies “unless the decree of adoption otherwise provides” (§ 16-1509). The chapter does not say more about how this rule works in a stepparent adoption.

Dissolving a Stepparent Adoption

Idaho allows a stepparent adoption to be dissolved in limited circumstances. Upon petition, an adoption may be dissolved with the agreement of both the adoptee and the adopting parent when the adopting parent was the spouse of a natural parent and that marriage has ended (Idaho Code § 16-1509A).

• An action to dissolve the adoption may be started any time after the adoptee reaches twenty-one (21) years of age (§ 16-1509A).
• The court must determine that avoiding statutory care is not the purpose of the dissolution, unless the court finds grounds to waive this finding (§ 16-1509A).
• If the petition is filed after the adoptive parent’s death, the court must specify the effect on inheritance rights (§ 16-1509A).

Rules That Apply to Grandparents and Other Relatives

When the prospective adoptive parent is the child’s grandparent, the social investigation of that grandparent is completed only upon order of the court (Idaho Code § 16-1506(4)). This exception names grandparents only; other relatives are not listed (§ 16-1506(4)).

Every adoption petition must state the degree of relationship, if any, between the child and the petitioners (Idaho Code § 16-1506(1)).

The age rules have no relative exception. A grandparent or other relative adopting a child must be at least fifteen (15) years older than the child, or twenty-five (25) or older (Idaho Code § 16-1502).

Shorter Abandonment Period for Grandparents

In a termination case, a parent’s failure without just cause to maintain a normal parental relationship for one (1) year is prima facie evidence (enough evidence, unless rebutted) of abandonment (Idaho Code § 16-2002(5)). When a grandparent seeking to adopt the child asks for termination, that period is six (6) months (§ 16-2002(5)).

Bringing a Child From Another State

The Interstate Compact on the Placement of Children does not apply when a parent, stepparent, grandparent, adult brother or sister, adult uncle or aunt, or guardian sends or brings a child into another state and leaves the child with any such relative or nonagency guardian there (Idaho Code § 16-2102, Art. VIII(a)). See interstate placement for details.

What the Code Does Not Separately Provide

Apart from the provisions above, Chapter 15 contains no separate petition, residency rule, consent rule, notice deadline or hearing procedure for stepparent or relative adoptions. The general six-month Idaho residency requirement for petitioners, with its child protection case exception, applies to them as it does to others (Idaho Code § 16-1506(1)).

How I Can Help

I work with stepparents, grandparents and other relatives who want to make a family relationship legally permanent in Idaho. I can explain which consents and notices the statutes require in your situation, whether a termination case is needed, and how the special home study and age rules may apply. Request a consultation to discuss your situation.

This page provides general information about Idaho adoption and termination of parental rights, based on the Idaho Code, and is not legal advice. Court rules (including the Idaho Child Support Guidelines), regulations, and case law also affect family law matters. Every situation is different; consult an attorney about yours. Reading this page does not create an attorney-client relationship.