+1It may be a condition of the planning regulations in the particular county that planning permission will only be granted for that plot of land for "local needs" - so putting a similarly worded condition on the sale of the plot is actually saving a lot of trouble for someone thinking of buying the site, who might not get permission to build.
the only restrictions really relate to if a new a houses the planning conditions state that the property must be remain in the ownership (or similar) for a period of time usually 7 years.Am I right in thinking that these conditions only apply to planning permission, and not to an actual house. There is no restriction on who can buy a property, once it has been built - right?