Is he getting any treatment for his ADHD? If not, that could help immensely. If he is, it sounds like it’s not working quite as well as it should and he needs to speak to the prescribing doctor about that.
It takes more than medication though. Having a reason for his disorganization doesn’t change it. He needs to create strategies and coping mechanisms that help him do better with those things. And, I just have to add, he may have never had to keep a toilet clean on his own before, so it just slides right under his radar. 😉
Beyond that, do what gives you peace of mind. If that’s putting some legal mechanisms in place, then do that.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism