Kevin McCloud follows the progress of a dual-purpose family and wheelchair-friendly home built by design engineer and former Paralympic swimmer, Mark Butler. Mark was paralysed from the waist down following a motorcycle accident and the home he currently lives in with his family makes it virtually impossible for him to complete even the simplest of tasks around the house. He and his wife Penny want to build a cutting-edge family home, with a drive-in basement, passenger lift and accessible kitchen and bathroom. However, building such a unique property proves a huge challenge, and the strain on Mark and Penny becomes almost unbearable