A detached garage was built in the 1980s under permitted development.  It was subsequently attached to an existing 1900s barn to form a dwellinghouse with planning permission.  A small extension was added to the garage and the Council came to the conclusion that as the garage had been attached to the original barn it was now an extension to the original barn and the extension was therefore a disproportionate addition to the original building.  The Planning Inspector disagreed and concluded that the 1980s garage, as originally built in its detached form, should be regarded as the original and on that basis the extension was not a disproportionate addition.