Today's auction property-developing projects take an incredible 14 days to more than two and a half years to complete. Martin, Martel and Lucy visit the properties in Sandgate in Kent and Bolton in Lancashireas well as a plot of land in Enfield in London at the start of the projects, following the progress until they're finished. Will any of the investors manage to make money?

A small garden with planning permission in the heart of historic Canterbury in Kent, a generously sized flat in London's Crystal Palace and a beautifully maintained bungalow in the quiet village of Branthwaite in Cumbria are all sold under the hammer. Martin Roberts, Dion Dublin and Martel Maxwell meet the new owners to hear their plans, which include a new build, an extra bedroom and a possible loft extension.