Architect George Clarke follows the fortunes of a 21-year-old fitness fanatic converting a 1920s railway carriage into a fully equipped luxury gym and sauna and the man going potty over converting a Victorian ladies loo into a romantic getaway. The presenter also visits a magnificent French chateau in the heart of Buckinghamshire. Together with master craftsman Will Hardie, George formulates an ingenious space-saving plan to convert a studio flat prototype into a magical secret garden.

A VW van gets a transformation with a twist, a brick bomb shelter is converted into a bijou bar, and George and Will forge ahead with their ultimate indoor-outdoor living project.