There is some "zoning" in the UK too, it is just not so set in stone. Most councils have areas that are pre-approved for new housing, any other areas would requ

There is some "zoning" in the UK too, it is just not so set in stone. Most councils have areas that are pre-approved for new housing, any other areas would require planning permission. Building in a conservation area (not necessarily rural!), on a listed building or in a "greenbelt" area require special permission, which is not always easy or obvious. I think the theory must be that people want some assurances. If somewhere is zoned for housing, I don't have to do pointless paperwork to build houses. It also keeps commercial areas away from residential which might or might not be a good idea although I suspect most residents prefer it that way.