Andy and Jeanette plan a precarious cliff-top build on the west coast of Scotland. There are battles with extreme weather, budget overruns, and a sudden emotional shock.

Kevin McCloud meets entrepreneur Paul Wilkinson and his wife Amy, who are building a giant new home on a 16-acre plot in Lincolnshire. The superstructure will be comprised of five circular buildings made up of interlocking timber cylinders, linked by raised wooden walkways that hang over a fishing lake. The complicated build proves difficult for Paul's local team, and their ambitious schedule of completing the project in a year soon looks out of reach.

Design engineer Mark Butler is paralysed from the waist down and needs a cutting-edge, wheelchair-friendly family home. Making it for £600k proves a huge emotional strain.

Kevin McCloud follows the progress of engineer Richard Bennett and his partner Felicia Böhm as they transform an underground water reservoir near the Humber Estuary into a family home. In 2013, the pair decided to embark on the ambitious build with a budget of only £150,000, but it proved a monumental challenge, and design and layout decisions stretched their abilities and the schedule to the max.

Cancer survivor Dad divides out the home into a number of interconnected units in a horse-shoe layout for his family.

For most people, living in a lighthouse is pure fantasy. Not so for Edward and Hazel Short and their two young daughters. Back in 2012, they set out to build a brand new, art deco, shining white lighthouse tower with additional bedrooms, guest rooms, and infinity pool on the side - all on a rugged but beautiful clifftop in North Devon. Kevin McCloud sees if they made that dream a reality.

Kevin McCloud revisits a home built on an airfield in Strathaven in Scotland to check on the progress made by Colin MacKinnon and his partner Marta Briongos. Their ambitious plan was to build a metal-sculptural home inspired by aircraft hangars right next to the runway, but the difficulties of building their elegant design saw a year-long project stretch to three years.