Has anyone else heard that moving can make you gain weight fast?

I was pretty happy with my weight in 2009; we had been living in a big house with stairs to the finished basement for ten years. As soon as we moved to a smaller, one story house in January of 2009 I gained twenty pounds! Have you heard of this before? This fact alone makes me want to move to a two story house but he doesn’t like stairs. He believes all older people fall down stairs and break bones and that Facebook is the real culprit !