What is the age limit to adopt an adult in California?

What is the age limit to adopt an adult in California? There is no age limit to adopt an adult in California as long as the proposed adult adoptee is at least 18 years old and the proposed adopting parent is older than the adoptee. Reference California Family Code section 9300.  Many adult adoptions in California take place after years or even decades of the de facto family relationship in place. In other words, the Adopting Parent(s) and the proposed Adult Adoptee have already been acting like family but have not made it legal.

For example, a Stepparent who raised a Stepchild into adulthood may want to adopt that Stepchild even at a later stage of life. It is quite common to have a 50-95 years old Stepparent (or even former Stepparents) adopting a 35-70 years old Stepchild (or former Stepchild).

Another example would be an elderly adult aged 50-95 years old who has no children present (or has been abandoned by their children) to adopt a proposed adult adoptee aged 35-75 years old. The challenge in these types of situations is not the age of the proposed parties, but rather the advanced stage of life of the proposed adoptive parent.