If you're ever inclined to buy an old house which is built into the hillside on three sides, don't do it. Unless it's our house. In which case, do.
'Why is the wall wet?' That was Sweetie Pie on her way upstairs, unwittingly presenting to us the news that the stairs wall is - well, not just damp. Damper than that. If it were any damper it'd be a river. And in the middle of this vertical marshland is the light switch. Now turned off for the foreseeable future.
Yikes. I foresee a visit from the builder and a very big bill. Another one.
Houses? On hillsides? Nope. Avoid them.