Developers tackle three ambitious projects with auction properties needing a lot of work to get them up to scratch. Martel Maxwell visits a house in Guildford, Martin Roberts falls in love with a GradeII-listed house in Torquay in Devon, and Dion Dublin is in Barry in Wales assessing all the work needed on a mid-terrace house. But will the developers' plans run smoothly and will any of them turn a profit.

A bungalow in Callington in Cornwall, a three-bed semi in Willenhall near Wolverhampton and a terraced house in Hertfordshire's Watford are all sold under the hammer. Martin Roberts, Dion Dublin and MartelMaxwell meet the new owners, and hear their plans for their auction buys. But for one developer there is a hard lesson learned after breaking a golden hammer rule.