Kevin McCloud visits homes in the running for the 2019 Royal Institute of British Architects House of the Year. This time, Kevin and his co-presenters, architect Damion Burrows and design expert Michelle Ogundehin, visit five experimental homes competing for a place on the shortlist. The properties include a pioneering home made entirely from cork in Eton, an innovative Derbyshire stone cottage, a bold family home on the South Downs with a vaulted interior, a micro-home built on the site of a double garage in London, and an extraordinary ultra-low-energy house in Buckinghamshire.