I was originally thinking 100% lived-in, by anyone wether they are the owner or not, and precise data down to each housing unit. That definitely gets into shade

I was originally thinking 100% lived-in, by anyone wether they are the owner or not, and precise data down to each housing unit. That definitely gets into shades of grey when you consider vacations and second homes, or even granny flats! What if someone owns a house but goes on vacation for 2 months every year? If you just want data you can probably trust residents to self-report this but if you were trying to implement a vacancy tax that might not work.