I've spoken with a landowner in the rural area of Saratoga, California, who owns a single parcel with more land than he knows what to do with, and I asked him why doesn't he build an MDU or some such, to which he replied that the city will never allow to re-zone and/or split the parcel of the land he owns, and that neighbours and such will generally be against any such arrangements, because it'll increase crime and drive the property values down.
However, upon what principle could an application to have the parcel of land split be denied? Wouldn't such restrictions unduly violate the property rights of the owner with such a large piece of land?