Err, you mean house...
(I live in the basement)
The Condos I used to live in were made from an old lumber mill, so each floor of the building was over 20 feet tall, and the units were then two levels (but occoupied one floor) with a loft above the kitchen for bedrooms, and then the dining room and living room had the full 20 foot ceilings.
They had a new tenant that bought 1/4 of the 4th floor and had three large units remodeled into one giant palace. He had a guest bedroom with it's own bathroom, and the brand new water heater leaked shortly after it was installed. It wasn't noticed for quite a while because the people who lived directly below them on the third floor were gone for the winter, and the people below them on the second floor were gone for the winter, so the flood made it to the first floor bedroom before being noticed. By that time it had completely destroyed both levels of the third floor unit, and both levels of the second floor unit!
It was quite a mess!