There’s even a 3D model of my house. In fact, there’s a 3D model plus raw point clouds of my entire state, they published it as open data. It’s pretty useful for planning PV installations e.g.

Looking around here houses have either been in the family for a long time, were built new or have been sold through word of mouth. Lots of those transfers never went through the hands of a real estate shark. I think the whole “building rows of same-ish houses and sell them online” is a rather American phenomenon.