We moved in to our new house in nov this year. DS was just turned 3.
DS was ok after the first day or two. He was really excited about the new house etc, so the first night we had to go to the toilet 7 times in a row before bed, things like that but he settled in really quickly.

We also lived with relatives for 7 weeks between houses and he was fine with that also, better even if thats possible! lol