From a unique opportunity to build a house in a vast space at the foot of a tower at the Barbican to a mysterious riverside house in Rotherhithe, and a former station house in Newcastleton, with its own private working railway track and locomotive, these unconventional properties are not necessarily what one would think of as home. But they are all intriguing, once-in-a-lifetime opportunities for the property hunter in search of a project.
Here are six of the best opportunities currently for sale or going under the hammer very soon: