In another meta question, I mentioned "The core of the site is mostly around parts of your home that were there when you purchased it, the structure, utilities, and major appliances." That leads to two questions. First, was I speaking out of place, or does everyone agree that this is a decent starting point when describing our scope? And second, if that description is a good summary, are there any objections to adding something along those lines to the top of our FAQ and About pages?
That sounds like a useful addition to the FAQ (and indeed about page) - perhaps replacing some (or indeed all) of the bullet points we currently have.
I think it defines the distinction between what's on and off topic quite clearly. There will be questions where there is dispute over which side of the line they lie, but hopefully it should be more obvious more of the time.