Your brother needs to be diagnosed by a professional. If he refuses to get help, I'd seriously be concerned about your parents wellbeing, and safety. They should not be afraid or uncomfortable living in their own home. If he is unable to control his temper, I'd want him out of the house asap.

But, since he is having a house built, I assume he holds a full-time job? So, he is able to manage his temper safely at work. Do you know how things are going for him at work? No one is psychotic only at home. So, he should be able to manage his temper in front of your parents, right? Am I making sense? If work has not been affected by this....it seems stress induced (living at home can sure be stressful for an adult), but controllable. Maybe he doesn't realize how out of control he is acting? Or he just doesn't care and is simply a bit selfish?

I am concerned that you said that he is getting worse. I hope he accepts your father's advice and gets the help he needs. Keep us posted!

emmy