Legal Question in Family Law in California

Re: At what age can the child decide?

they never get to decide. if they are old enough to express an opinion the judge is supposed t consider it but it is not the deciding factor.

Re: At what age can the child decide?

There is no law that says a child can decide who they want to live with. That is within the sound discretion of a judge. A Court will take into consideration what a child wants if the child is sufficiently mature enough to testify. If your child wants to live with you, I would consider doing an OSC asking for a change of custody, and an attorney to be appointed for the child. This would be the best way to the child's wishes expressed to the Court.