Good morning and thank you for posting on the Final Fantasy XIV Technical Support Forums.

It's likely that you have a different character on that world that is part of a Free Company with a house. That email is sent to every member of the Free Company, regardless of your activity on that character. Double-check if you have any other characters on that world. On the bright side, if that house is demolished, it doesn't sound like it will affect you.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!