This may well be whythey made the door open inward. That's all they knew. But they should have looked at the blueprints and at the room first.
They also had to molding or baseboard around the hall. When they got there, the tile had been laid in half the hall, so they put the baseboard just above the tile where there was tile, and just above the plywood where there was no tile!
They made other mistakes too but I don't remember what they are. The couple would go out every day after work to look at the house, and she was never bothered by these things, but he was.
She told me that building the house is what ruined the marriage, but after I knew her better, I knew that wasn't it!