I'm going to change the lock code to keep the kids out of the house
Isn't it your responsibility to have a place to live in for your kids?
I just want to stop them from going in my house.
It's strange that you don't want to spend time with your kids for no good reason. You're their parents so it is expected of you to be there for your kids.
They are distracting.
Most kids are. You knew full well that your life will be different when you have kids. Be responsible and take care of your kids.