A home study or investigation is not required for a California Adult Adoption Case.  Pursuant to California Family code section 9300 et seq, in a California Adult Adoption case, the Judge must make a finding that the adoption will be in the best interests of the parties and in the best interests of the public. Therefore, the Judge has the discretion to require a home study or investigation into the suitability of the Adopting Parent(s) and the appropriateness of the adoption, but this simply never happens in California Adult cases. Therefore, it is safe to say that a home study or investigation is not required for a California Adult Adoption Case.