I have a property with two dwellings on. I was given permission 5 years ago to build a workshop with ancillary accommodation on the first floor, the application was given on the understanding that the accommodation was to be used solely by the owners of the main property. The building measures 180sq ft. I have asked the local council for approval to be able to create two separate entities. The council however have refused to allow this (informally) My question is this. If I decided to sell off the house and retain the property that I built what in effect could the council do, after all the house will have been sold.